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928S from 1985 - Running hot
Hi all,
Need some help/suggestions.
My Porsche 928S from 1985 with automatic transmission, is running hot. Within few minutes of driving (10-12 min) and not loading the engine at all, it has the temperature gauge needle in the dash hitting the second highest white line, and continues to go in between last white line and the red zone. It stayes in that area and doesn’t seem to go all the way in the the top of the red. But I’ve not dared to keep on driving long enough to test it fully.
I know the engine is HOT, because you can feel in when opening to the engine room, everything just feels too hot, so I’m 99,9% sure the gauge in the car is right.
Many things have been tried fixed but without fixing the problem:
- brand new water pump incl cam belt installed
- brand new thermostat installed (btw did test it before installing it)
- all coolant exchanged (btw using red coolant)
- tried to vent the system to avoid air trapped in the cooling system
- jumped the wires to the temperature switch on the radiator, to ensure the fan in front of the A/C condenser is running full speed at all times (didn’t change anything)
- verified that the coolant system isn’t leaking, so no coolant is lost.
I have probably done more, but can’t remember now…
BUT is obvious for me that I’ve got no clue what next to try, hence this post.
What would you try next to find the culprit?
Bug thanks in advance for all your advise.
BR
Chris
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