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Cooling system question V70-XC70 1998

posted by  Robert S. on  Thu Jan 22 07:05 CST 2015
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last visit: Sun Sep 21 05:48 CST 2014
[RELATED]

This can be a sign of hot exhaust gasses in the cylinder leaking past the cylinder head gasket and into the engine cooling passages. The internal cooling system pressure becomes abnormally high, hoses bulging and excess pressure is released through the pressure cap and/or coolant hose leaks. I lived this exact scenario with a 240 turbo. The fix is to replace the cylinder head gasket and while disassembled, insure there are no cracks in the cylinder head.

Find a reputable repair shop that has the instrument to detect exhaust gas hydrocarbons in the cooling system. The answer will help your troubleshooting.






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