As some of you know the P38 diesel can be prone to overheating especially when offroading. The cylinder head might warp and this results in a head gasket failure.
Nowadays these cars start to get old and they are not always very well maintained. Especially the cooling system is often neglected and often the cause for overheating.
While working on my own car I noticed that when the engine temperature needle sits in the middle on the dash, the actual temperature can ranges between 85 and 105 degrees celsius!
Ideally the temperature should be 95-98 degrees. I noticed the temperature going up quite a bit while driving especially when driving uphill. Ok it settles fast enough to normal values after that but I'm not sure if I can live with that.
Fortunately there is a workaround to aid in the cooling process.
The solution is the removal and the implementation of an electric fan(s) rather than a viscous coupling clutch fan.
There are existing aftermarket solutions available for that, with complete kits ready to install. However, if your vehicle is equipped with an air conditioning system one could use these fans instead.
They are used by the aircon system in 2 modes, slow and high speed mode depending on the pressure in the aircon system. The engine ECU also uses these fans when it detects an overheating situation but by than it might already be to late.
A possible solution is to install a capillary thermostat with a range from 0-120 degrees celsius. You'll have to connect it electrically to the dual pressure switch and to (chassis) ground.
Note: These are not rated for use outdoors or even 12v. However they are easy to find and cheap. You'll also have to make a waterproof case to make sure it does not get wet.
It is a simple diy job, anybody can do it really. Also before you do this mod make sure all other components in the cooling system are in good working order so you don't mask any underlying problems.
Here you'll find more information about the Ac-fan mod in more detail .
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