Question about 1991 Peugeot 405
Hi Dave. You should have the sick in the gut feeling by now... pressure in the water system is a sure sign of a head gasket failure. There are no quick fixes for head gaskets most of the time... you can try a product called "stop leak" but I have never had any luck using it to resolve a head gasket leak. Most any product you use or introduce into the coolant to try and stop the leak will have side effects that usually end up costing more money down the road.
The first thing you do is loosen the radiator cap to the first notch and leave it there until the head gasket is replaced. It will require you OFTEN add coolant / water to your radiator and will bypass the function of the coolant recovery tank.
I wish I could be of more help here. I just want to be honest about what your up against.
Posted on Feb 07, 2010
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Posted on Jan 02, 2017
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