Question about 1987 Porsche 944

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What could it be

I had a new rebuild water pump put on and my 87 porsche still do not run or sound right.it run hot ust by idling in the yard.what could be making it run hot so quickly.

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When you replaced the water pump did you replace the thermostat? If it is sticking it will overheat. The 944' s are picky about getting all of the air out of the cooling system. Don't forget to use the bleeder bolt. Also if it is really full of water without air in the hoses the upper and lower hoses will be hot and firm due to pressure. The radiator fan should also be kicking on. My bet is air in the cooling system. Air also like to hide in the head. Be careful to not let it overheat. As for the not running right and sound I believe that is another issue. Also I hope you got a good reman pump. Good luck.

Posted on Jul 13, 2015

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Hi, I think you have an airlock in the pump,You need to drain the water totaly when stone cold.Drain radiator and disconect hoses from waterpump and top hose from themostat. Reconect pump hose and add water slowly into radiator through top hose untill rad is full then squeeze bottom hose vigourously,You ll feel the water tension in the hose, Connect all hoses and top up water level. This must be done cold as hot and cold water will cause an airlock. Hope this helps you out.All the best.Phil

Posted on Sep 11, 2008

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