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MOCAL® - the most comprehensive line of oil cooling and fluid conveying products for automotive, marine and industrial applications. 

Mocal oil cooling products
 
Oil coolers

The most popular oil to air coolers are the pressed plate range, which were first made in the late 50's. These coolers, built to our specification since 1965 must rate as the single most commonly used component on racing cars world wide.

The cooler consists of a variable number of aluminium pressed plates forming oil ways and end tanks, the oil ways contain turbulators. These do not only break down boundary layer effects in the flow to obtain maximum heat dissipation without undue pressure drop but also, because they are brazed to both surfaces of the plates, hold them together under pressure. The oil ways are interspersed with aluminium strip louvered and formed into corrugations to provide airways. 

The design is beautifully simple and efficient and most suitable for mass production, but it is restricted to a 2" thickness and a limited amount of lengths.
The secret of the success of the Mocal cooler is our insistence on the highest standards of build quality allied to a rigorous inspection system. In particular the attention paid to the accuracy of the pressing tools to ensure the closest contact of the plates during the "Nocoloc" brazing process ensures our superiority over look-a-likes from the Far East.

Maximum working pressure on the standard range of coolers is 10 bar (150psi)although each cooler is tested to 11.5 bar (170psi) this is adequate for all but the most arduous motoring applications, however some customers prefer a higher pressure rating, for instance where the pressure by pass valve does not provide enough protection as in high rpm in cold start up conditions or on dry sump installations.


We have introduced a heavy duty (HD), 12bar (180psi)working pressure, version of the cooler which is dimensionally similar but has aluminium castings between the plates, on the standard cooler this is the weakest point where they are unsupported by fins or turbolaters, there is also thicker material in some areas. These coolers are about 18% heavier.

 



Weights and Measurements

The coolers are available in various heights and two widths, 115mm matrix or 235mm matrix but only one, 51mm, front to back measurement. The height of a cooler is usually r ferred to in rows, these are the number of oilways including top and bottom plates which carry oil.



Performance

Interpreting the graphs

We will take Mocal heat transfer (II) as an example.
1. Calculate oil flow per tube. Usually an unknown, the oil flow through the engine can only be measured using a flow meter. ( Example 29 litres/min through 16 row cooler \29 ¸ 16 = 1.8 litre/ min ).
2. Calculate etd (extreme temperature difference ) (Example oil in to cooler at 120° C - Ambient at 25° C \ 120 - 25 = 95)
3. State matrix air velocity. Again an unknown depending on cooler position, whether ducted etc, typically a fifth of the available air would go through the cooler. ( Example road speed 112mph divide by 2.25 to get 50 metres/sec divide by 5 gives 10 m/s m.a.v.)
4. From the graph we find we are dissipating 8.8 watts per tube per °C etd.
5. Calculate total heat dissipated ( Example 8.8 x 16 (tubes) x 95 (etd) =13376 watts @ 13.4 kilowatts.
6. Calculate oil out of cooler temperature which is arrived at by deducting the heat dissipated multiplied by a constant of 39 divided by the oil flow rate from oil temperature in to cooler
( Example 120 - ( 13.4 x 39 ¸ 29) = 102° C
From this we can conclude that in the example given we are reducing the temperature of the oil going to the bearings from 120° C to 102° C. If it seems too complicated please send us the parameters and we will work it out.
Setrab have no graphs available, but do have a comprehensive computer programme to work out individual cases, please give us the parameters and we will provide a print out.
Graphs for oil pressure drop are self explanatory, however please note that the oil in the Laminova graph is at 120° C, the oil in the Mocal is at 100° C and therefore thicker, so meaningful comparisons are difficult.
KPa to psi multiply by 0.145
Bar to psi multiply by 14.5
Oil cooler installation kits
oil cooler take offs We manufacture components to enable all types of oil cooler to be fitted any kind of vehicle. To save our customers time and trouble we are able to supply a complete installation kit for fitting Mocal coolers to production cars, part numbers for the more popular kits are shown below, no vehicle is impossible provided we can find an example to measure, so please ask if a model is not listed. In the kits we use a top quality textile braided elastomer (a type of black rubber) covered hose with factory swaged on BSP fittings, we also offer these hoses with a stainless steel braid covering where enhanced appearance and extra abrasion resistance is required. Hose bore is 1/2", where we feel that oil flow could be restricted we use 5/8"

If, as on most modern cars, a spin off oil filter is used then the kit can incorporate a built in oilstat, if the car has a disposable element filter then the oilstat must be ordered separately and inserted into a suitable section of hose run after installation, where braided covering has been specified then to avoid frayed ends at the oilstat use suitable Proclamps, part no HF-10 for 1/2", HF-12 for 5/8".

Cooler size. We recommend a 10 row cooler for most cars under 2 litres with a 13 row for larger capacity engines.
Kits with * in price list need coolers with 5/8 BSP connections.

Part No Description Part No Description
OCI40 Alfa 4 cyl rear drive pre 1972 OCI998 Mazda 323 (T)
OCI41 Alfa 4 cyl rear drive post 1972 OCI1879 Mercedes 190 * (T)
OCI42 Alfa Alfetta (T) OCI98 MG late TC early TD
OCI43 Alfa Alfasud (T) OCI99 MG late TD/TF
OCI2418 Aston Martin DB2/4 MGA1 MGA kit has OEM style steel tubes
OCI44 Audi 80 (T) OCI96 Morgan plus 8 preSD1 engine * (T)
OCI45 BMC Mini/MiniCooper OCI97 Morgan plus 8 with SD1 engine * (T)
OCI46 BMC Mini Clubman 1100/1300 OCI94 Morgan 4/4 (T)
OCI49 BMC 2200/Princess (T) OCI95 Morgan plus 4
OCI53 BMC Healey 100-6/3000 OCI100 NSU 1000/1200
OCI1718 BMC Maestro 2ltr (T) OCI104 Opel Manta/Ascona before 1981 (T)
OCI52 BMC Sprite/Midget pre 1974 OCI1511 Opel Manta post 1981 (T)
OCI51 BMC Midget 1500 (T) OCI1828 Peugeot 205 (T)
OCI60 BMW 4cyl post 1863 *(T) OCI1540 Porsche 924 (T)
OCI1179 BMW 6cyl pre 2.3ltr *(T) OCI109 Reliant Scimitar 3 ltr * (T)
OCI61 BMW 6cyl post 1969 * OCI110 Reliant Scimitar 2.8 ltr * (T)
OCI964 Caterham Super 7 1981-83 (T) OCI111 Renault 5 (T)
OCI1287 Caterham Super 7 1983 (10x115 cooler)(T) OCI2417 Renault 5 GT Turbo
OCI151 Chevrolet Camaro V8 * (T) OCI999 Renault 18 Turbo (T)
OCI1000 Chevrolet Corvette * (T) OCI112 Rootes Imp/Chamois (T)
OCI1829 Colt Shogun * (T) OCI115 Rootes Avenger (T)
OCI887 Colt 1200/1300/1400 fwd hatchback (T) OCI118 Rover Range Rover * (T)
OCI63 Colt 2000 rear wheel drive (T) OCI119 Rover new 3500 * (T)
OCI64 DatsunCherry (T) OCI120 Rover Land Rover
OCI66 Datsun 160/180 (T) OCI122 Saab 99 2 ltr (T)
OCI68 Datsun 140Z/260Z/240K/260C (T) OCI128 Skoda S110 (T)
OCI70 Fiat 128 (T) OCI124 Subaru 1600 (T)
OCI71 Fiat 127 (T) OCI127 Sunbeam Lotus
OCI69 Fiat 4cyl rwd (T) OCI2435 Suzuki Swift (T)
OCI73 Fiat Ritmo/Strada (T) OCI997 Toyota Corolla (T)
OCI72 Fiat x-19 (T) OCI129 Toyota Carina/Celica (T)
OCI2423 Fiat Uno Turbo OCI130 Triumph Herald/Spitfire (T)
OCI77 Ford Ang/Esct/Ctna pre 1971 OCI131 Triumph Vitesse/GT6 rhd
OCI78 Ford Esct 1300/1600 ohv post 1971 (T) OCI132 Triumph TR2/3/4a
OCI1204 Ford Escort Mk3 (T) OCI133 Triumph 2000/2.5 PI
OCI74 Ford Fiesta (T) OCI134 Triumph TR5/6
OCI150 Ford Mustang V8 * (T) OCI135 Triumph GT6 lhd
OCI75 Ford RS2000 * (T) OCI136 Triumph Dolomite
OCI76 Ford V4/V6 German eng. * (T) OCI137 Triumph TR7
OCI80 Ford V4/V6 UK eng not pas * (T) OCI1230 Triumph TR5/6 spin off
OCI81 Ford V4/V6 UK eng with pas * (T) OCI1382 Vauxhall Astra 1800 & GTE
OCI2391 Ford Sierra Cosworth * (T) OCI138 Vauxhall Chvt/Viva/Frza ohv
OCI82 Honda Civic OCI141 Vauxhall Chvt/Vva/Frza.Mgm ohc (T)
OCI83 Honda Accord/Prelude (T) OCI142 Vauxhall Cavalier pre 1981 (T)
OCI2421 Honda CRX (T) OCI1511 Vauxhall Cavalier post 1981 (T)
OCI84 Jaguar 6cyl E type * OCI146 Volkswagen Beetle
OCI85 Jaguar Mk2/240/340/XK150 * OCI147 Volkswagen Beetle kit with remote filter
OCI1582 Jaguar XJ6 * OCI148 Volkswagen Golf (T)
OCI1830 Jaguar XJ12XJS V12 * OCI149 Volkswagen Scirocco (T)
OCI86 Lada all models (T) OCI143 Volvo 4cyl not 66/343 (T)
OCI89 Lotus Elan post 1971 (T) OCI144 Volvo 6 cyl
OCI91 Lotus 7 post 1971    
OCI92 Lotus Europa Ford eng. (T)    
OCI93 Lotus Europa Renault eng    
Oil cooler take offs
oil cooler take offs  
Any engine fitted with a full flow oil filter may be adapted to take an oil cooler. This is achieved in various ways.

Oil cooler take-offs

Type A A sandwich plate fitted between filter head and filter bowl. In certain cases there is insufficient room to fit a sandwich plate, in these instances it is sometimes possible to obtain a filter assembly shorter than the original fitting. We can advise if such filters are available for any particular engine. Our sandwich plates for engines with spin on filters can have built in thermostat.
Type B A sandwich plate between the filter assembly and cylinder block.
Type C Discard the original filter head and replace with a filter head tapped to take the oil flow.
Type D

The original filter assembly may be relocated and instead of a sandwich plate, a take-off plate and remote filter may be fitted, see below. In the case of the Triumph Dolomite and Stag a cover plate on the block may be removed and replaced with a special take off (TOP7/7B)
Type E For the Rover, Buick, Oldsmobile, V8 where space can be very limited we can supply a replacement oil pump cover with outlets for a remote filter plus oil cooler if required.
Type F For the 6 Cylinder Triumph engines where there is not enough room to fit a Type A plate we provide an adapter turning the filter through 90º, For convenience this takes a spin on oil filter
Type G In the case of BMC "A" and "B"series engines an external oil pipe may be removed and replaced with hoses running to and from the oil cooler. "A" series have 1/4 NPTF & 5/8 UNF use HEM8-4-8 & HEM1-7-8 hose ends or suitable adapters. "B" series have 1/2BSP threads, use suitable adapters.
Type J The Volkswagen Beetle and Porsche derivatives have an oil cooler fitted to the engine as standard, this will be insufficient for modified engines and also blocks the air flow to number 4 cylinder. We provide an adapter to fit in place of the existing cooler with 3/8NPTF connections to cooler. Consideration may be given to fitting a remote oil filter in the cooler circuit, the original engine having no filter, we advise fitting a part number 500 valve in place of the original combined oil pressure relief and cooler bypass valve, this ensures oil flow through the filter at all times. An oilstat can be used to control flow to the cooler.


Take off plates for use with remote filters:

It is sometimes desirable to relocate the existing oil filter due to lack of space brought about by engine changes, installation in kit cars, fitting an oil cooler or in a dry sump system. We have two types of take off plates that fit in place of existing spin on filter to allow for connection to a remote filter.

Type H Top take off, TOP will require a minimum of 4.5" clearance including hose fittings and adapters.
Sideport take off, TOPO will require only 2.5" clearance. Can be turned to face any direction.

Fitting chart 

Make Model Sandwich
Pt No
Type Take off
Pt No
Alfa Romeo all 4 cyl models after '72 SP1 A TOP1/TOPO1 H
all 4 cyl models SP14 B  
American Motors all models '65 on SP1C A TOP1C/TOPO1C H
Audi all models SP1 A TOP1/TOPO1 H
Austin Healey Sprite G
all 6 cyl models SP15 B
Austin/Morris BMC etc all models with "A" series engine A
BL Montego SP1C A TOP1C/TOPO1C H
Maestro with o series engine SP1C A TOP1C/TOPO1C H
Marina 1.3 SP1E A TOP1E/TOPO1E H
BMW all models with spin on filter SP1 A TOP1/TOPO1 H
6 cyl models with removable element filter SP26 A
Buick all models '59 on SP1C A TOP1C/TOPO1C H
all models '78 on SP1D A TOP1D/TOPO1D H
Cadillac V6 all models all models '60 on SP1C A TOP1C/TOPO1C H
Chevrolet All V8 models with spin on filter SP16A A TOP16/T0O16A H
all models '78 on SP1D A TOP1D/TOPO1D H
Chrysler (America) all models '59 on SP1 A TOP1/TOPO1 H
Chrysler (Britain) all models SP1 A TOP1/TOPO1 H
Daf all models SP1 A TOP1/TOPO1 H
Datsun all models * SP1* A TOP1/TOPO1 H
FIAT all models over 900cc SP1 A TOP1/TOPO1 H
Ford (GB) Anglia 105F, Cortina & Escort '70 on SP1 A TOP1/TOPO1 H
above pre Oct '70 SP3 A
V4 and V6 models SP1 A TOP1/TOPO1 H
Ford (Germany) all models '62 on SP1 A TOP1/TOPO1 H
Ford (U.S.A.) all models '59 on SP1 A TOP1/TOPO1 H
Honda Accord/Prelude * SP1G* A TOP1G/TOPO1G H
Jaguar MK2, 240, 340, XK150 SP10 A
all other 6 cyl models SP31 B
all 6 cyl models FH2 C TOP10
all 12 cyl models FH4 C
Lotus all models after '71 SP1 A TOP1/TOPO1 H
Elan all models pre '71 SP3 A
MG Midget 1500 SP1A A TOP1A/TOPO1A H
late TD/TF SP24 A
MG A/B G
Mazda all models '89 on SP1F* A TOP1F/TOPO1F H
Mercedes 230SL and 220 range SP8 A
Mitsubishi Colt all models * SP1F* A TOP1F/TOPO1F H
Morgan Plus 4 SP9 B
Plus 4 SP13 A
See explanation under "Triumph"
NSU 1000, 1200 use with spin-off filter SP12 A
Oldsmobile all models '60 on except V6 '78 on SP1C A TOP1C/TOPO1C H
V6 models '78 on SP1D A TOP1D/TOPO1D- H
Opel all models except 1.6/1.8 ltr after '81 SP1 A TOP1/TOPO1 H
all V8 models SP16 A TOP16/16A H
Peugeot 204/5 & 304/5 '75 on except GTI SP1 A TOP1/TOPO1 H
204/5 & 304/5 to '75 except diesel SP1D A TOP1D/TOPO1D H
GT GTI & Diesel SP1 A TOP1D/TOPO1D H
204 SP20 A
404 pre March '68 SP22 A
Pontiac all models '60 to '78 SP1C A TOP1C/TOPO1C H
all models '78 on SP1D A TOP1D/TOPO1D H
Reliant V6 models SP1 A TOP1/TOPO1 H
Renault all models SP1 A TOP1/TOPO1 H
Rover

 

2000, 3500 & all derivatives with SD1 engine SP1 A TOP1/TOPO1 H
3500 pre SD1 engine SP1C A TOP1C/TOPO1C H
Replacement pump cover use with remote filter for 3500 and all V8 derivatives E PC1 E
Land Rover 4 cyl SP11 B
Replacement filter head to fit all "K" series engines FH6 C
213,800,827 SP1G A TOP1G/O1G H
214, 220,414i,420  "K" series, 820 SP1C A TOP1C/TOPO1C H
216 to 1990 SP1 A TOP1/TOP01 H
216 1990 on Honda engine,218,416,418,600 SP1F A TOP1F/TOPO1F H
Saab V4, 99 2 ltr (for 1800 99 see TOP 7) SP1 A TOP1/TOPO1 H
Simca 1000, 1200S, 100, 1204 SP1B A TOP1B/TOPO1B H
Studebaker all Avanti, '62 on SP1C A TOP1C/TOPO1C H
Subaru all except those with "micro" filter '86 on SP1* A TOP1/TOPO1 H
'86 on with "micro" filters SP1F A TOP1F/TOPO1F H
Toyota all models * SP1* A TOP1/TOPO1 H
'87 on with "micro" filter NEW SP1* A TOP1/TOPO1 H
Triumph Spitfire, Herald SP1A A TOP1A/TOPO1A H
TR5, TR250, TR6 r.h.d. GT6 and Vitesse SP6 A TOP/6 H
TR2/3/4/4a SP9 B
TR2/3/4/4a SP13 A
With the SP9 the oil cooler is upstream of the oil pressure valve, damage has occurred during high RPM cold starts. The SP13 avoids this problem but does not suit all installations. 
2000, 2.5PI, Left hand drive GT6 FH3 F
TR7, Dolomite D TOP7 D
Stag   D TOB7b D
Vauxhall all 4 cyl OHC models to '81 SP4 A
all 6 cyl engines except Velox, Cresta, Ventora SP1 A TOP1/TOPO1 H
4 cyl not OHC engines '63 on SP4 A  
Volkswagen all models except Beetles with no oil filter SP1 A TOP1/TOPO1 H
Beetles D TOP27 J
Volvo all models SP1 A TOP1/TOPO1 H

Part Nos. SP1/A/B/C/DE/F/G can have thermostatic operation, prefix part no with OT, e.g. OTSP1. Alternatively they may be tapped to take an oil temperature gauge prefix with TGA.

*We have also made a quantity of sandwich plates from billet aluminium to fit the Japanese microfilter which are of slightly smaller diameter than the new SP1. They are called SP2A/B/ etc. 

For remote filter applications where no take off is shown, the only solution is to use a sandwich plate together with the existing filter bowl with the filter removed, if space is limited, bowl and center bolt must be cut down to suit.

Hose assemblies
oil cooler take offs Moquip oil hoses and fittings are economically priced and suitable for all oil carrying purposes in vehicles except those used in competition where regulations specify a 135°C maximum temperature. (The hose will still function at these temperatures but a gradual but detectable hardening of the hose will shorten life).

Standard black hose

Has an elastomer (type of rubber) inner tube, one textile braid reinforcement and elastomer outer cover in accordance with SAE 100R6 specification The temperature range is -40°C to +120°C. 400psi(27.5bar) working, 1600psi(110bar) burst pressure.

Dimensions and bend radius

mocal hose assemblies

Stainless steel braided hose

We can supply Moquip 100R6 with a stainless steel braided cover where enhanced appearance and extra abrasion resistance is required. Competition regulations invariably require a braided covering for hoses running through the cockpit area.

Dimensions and bend radius

mocal hose assemblies

Fittings for oil hose

The lightweight mild steel fittings with serrated shaft are usually swaged to the hose at our factory. When ordering,measurements should be taken from mating face to mating face, if the assembly does not include a straight fitting, orientation of fittings may be specified, although the swaged ferrule may be clamped in a vice and the fitting rotated to the desired position. When required for on-site assembly use with a worm drive clamp tightened to 10 inch/pounds (1.2Nm), an O-clamp which is secured with pincers is a neat alternative, use a Proclamp if hose is wire braided to avoid unsightly frayed ends.

Remote filter heads
oil cooler take offs A range of bracketed filter heads which take the modern spin on oil filter cartridge and enables relocation of the oil filter.

  • Caused by lack of room due to engine changes
  • Installations in kit cars
  • Fitting an oil cooler
  • Conversion to dry sump system
  • Conversion to full flow filtration on older cars
  • They are often used in conjunction with a take off plate which is screwed on in place of the original filter
Suitable oil filter elements are available from many manufacturers, most of them have catalogues with full specifications. When choosing, the first requirement is that it should have a 3/4"UNF thread, 1"UNF if high oil flows are anticipated. The larger the oil filter the less the oil pressure drop so chose the largest that can be accommodated unless weight is a problem. Filter heads can be mounted in any attitude, but we suggest when choosing an oil filter that is to be fitted in other than an upright, filter below, position, it should have an anti-drain valve. No provision is made in our heads for filter relief valves, these are available built-in on some filter elements, they should be avoided if regular oil changing and gentle warm ups can be relied upon. Filter heads can be mounted in any attitude, but we suggest when choosing an oil filter that is to be fitted in other than an upright, filter below, position, it should have an anti-drain valve. We are always pleased to recommend a filter for any application. Direction of flows listed below are for filters as illustrated. (remember oil always flows down the outside of the filter and returns up the middle).

RFH1. Takes filter with 3/4UNF thread. A compact design which will require a spacer if a filter larger than 80mm diameter is mounted against a flat surface. Provision can be made to take a capillary type temperature gauge sender or pressure gauge tapping. Available in either flow direction. Has 1/2BSP female ports with a recess to take No 590 sealing ring. Material cast aluminium.
RFH2. Takes filter with 3/4UNF thread, has 1/2BSPports with a recess for No 590 sealing ring. RFH2G takes 1"UNF and has 3/4BSP ports. Both 80 & 98mm diameter filters can be accommodated. Bosses are provided which may be tapped to provide for pressure gauge, oil feed take offs, etc. Left to right flow only. Material cast aluminium.
RFH3. Takes filter with 3/4UNF thread. Left entry RFH3A has 1/2BSP ports, right entry RFH3B has 1/2NPTF. 80 & 98mm diameter filters can be accommodated. RFH3A has bosses.. Material cast aluminium.
RFH4. Takes filter with 3/4 UNF thread, has left to right top entry 1/2 NPTF port. Material cast aluminium.


Complete remote oil filter kits:

These kits comprising take off / pump cover, remote filter head, adapters and hoses are available for the popular Land Rover/V8 conversion and can be made up for any installation.

THREADED ADAPTERS
oil cooler take offs We keep over 1000 different kinds of threaded adapters in stock mainly in aluminium and plated steel.

We have CNC lathes with programmes written for every kind and size of thread to enable us to produce even small quantities of adapters in any material quickly and cheaply.

We also have a database of all adapter suppliers enabling us to locate any 'off the shelf' items.

Gauge adapters and warning systems
mocal gauge adaptors

We keep over 1000 different kinds of threaded adapters in stock mainly in aluminium and plated steel. We have CNC lathes with programmes written for every kind and size of thread to enable us to produce even small quantities of adapters in any material quickly and cheaply.

We also have a database of all adapter suppliers enabling us to locate any 'off the shelf' items.


Early warning systems

Oil pressure switches

Low oil pressure switches are offered as alternatives to the" whoops its too late" pressure warning transmitters fitted as original equipment, ours provide a warning when the oil pressure drops below the desired running pressure, they can irritate by actuating a warning when the engine is ticking over but are absolutely essential for spotting signs of trouble in a competition engine.

They have a 1/8 NPTF thread so screw into matching thread on T piece and use a suitable pressure gauge adapter on the thread vacated by original transmitter. We also offer a fuel pressure warning switch for carburettor engines, an essential to warn of failing pumps, blocked lines or filters all of which can cause a weak mixture to melt pistons in seconds on a highly stressed engine. A nil pressure fuel switch may be fitted downstream of an electric fuel pump to turn pump off in the event of an accident resulting in fuel line rupture etc.

T pieces and oil pressure gauge adapters

All engines have a tapping on an oil gallery to take the oil pressure warning transmitter, we make a range of T pieces to screw into this tapping, T pieces have one male thread to screw into the oil gallery, a female thread to take the original transmitter and a female 1/8 NPTF tapping which allows a pressure switch or a 1/8 BSP female pressure gauge line to be attached via a MMS10-3-3 adapter.

The chart below shows tapping thread for most engines.

Warning lights

Best if immediately visible, ours are 29mm diameter with a choice of red, yellow, green, blue or clear lens, they have a removable diffuser under the lens which may be titled using dry print lettering. A T5.5 side contact bulb is accessed from the front and is sealed against ingress of dust, oil and water. Weight is 1.5 grams.
 
Oil pumps
mocal gauge adaptors

Electric Oil Pumps

Mocal oil coolers are used for cooling gearboxes, crown wheel and pinion units, differentials and power steering pumps, here the primary problem is not so much concerned with avoiding bearing metal to metal contact, as in engine cooling, but in preventing loss of tolerances due to heat expansion of metals which in turn lead to greater friction resulting in a runaway spiral of heat build up.

Some gearboxes and all power steering pumps have an oil pressure system that can be tapped for oil flow otherwise a remote pump is required.When designing an installation these pumps require a switch, either heat actuated or manual, pumping cold oil is not recommended. Add extra oil to fill cooler, pump and pipes which must be at or below the normal oil level otherwise the oil level in the gear housing will be too high when the pump is switched off. When returning oil onto the gears do so after the point of contact to avoid pumping losses caused by cool oil. If difficulty is experienced in supplying ram air to an oil to air cooler we can supply a fan and housing. Use -6 (3/8" bore) hose.

MOCAL oil cooling diaphragm pump

Pump has integral cooling fan, 12 or 24volt motor. Ports are 3/8NPTF and may be rotated in 90o increments to simplify plumbing. The pump body is made of lightweight nylon, care must be taken when tightening tapered adapters not to over tighten and crack housing.

Perfomance: 2 UK gals/10 litres per minute with 7 amps current draw. Temperature constant use up to 130oC, intermittent up to 150oC.

Dimentions: Weight: 1.5kg/ 3.3lbs

Temperature Switches.

Use to control oil pump action. EWS/1F is a single pole switch and connects to earth on the rise and disconnects on the fall at 110oC, remember component into which it is inserted must be earthed. EWS/1G is a two pole surface mounted switch with two screw holes, connect into earth line, makes on the rise at 100oC and breaks on the fall at 82oC.
Tanks and pots
Information coming soon.
Spin off filter adapters
Information coming soon.
Fuel sampling kits
Information coming soon.
Mocal Oilstats
mocal gauge adaptors

Prolonged use of a car engine in conditions where the oil cannot reach its correct working temperature will cause sludge formation and crankcase oil dilution, leading to excessive wear especially in the cylinder bores. Optimum engine power will only be delivered at correct temperatures. The elimination of drag in engines caused by cold oil is a most important consideration, especially with a racing engine, revving the engine without a load will not put much heat into the oil and devices for preheating the oil may not be available.

It is therefore desirable to control of the oil flow through the cooler by a thermostatic device, we call an oilstat, set to divert oil to the cooler at 80ºC (although a wide range of settings is available for special applications). This is the minimum temperature required to evaporate and dispel contaminating substances.

Mocal Oilstats

  • Can be built into the oil cooler take off for most engines with spin-off filters, they add nothing to the thickness of the plate.
  • Are available as a separate unit to be fitted into the oil lines. Two sizes of oilstat for in line fitting are available.
Mocal oilstat OT1
The OT/1 can be supplied with push on fittings for 3/8" or 1/2" bore hose only and is designed for smaller engines with relatively low oil flows.
Dimensions
Mocal oilstat OT1 dimentions
Mocal oilstat OT2 The larger OT/2 can be supplied with any form of push on or threaded connection, male or female.
Dimensions
Mocal oilstat OT2
The bodies of the these units are die cast aluminium. Control is by a "waxstat", a mass produced item built to highest standards. They are light enough to be supported by the hoses, however a bracket is supplied with the slightly heavier OT/2, if further restraint is required. The oilstats should only be used where oil cooling is adequate, the sensing device will suffer permanent damage above 140°C, replacements are available.
 

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