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Posted on Jan 02, 2017
SOURCE: Head Gasket?
an emulsion build up on the cap can only be caused by water. the question is how the water is getting in, mostly likely head gasket. are you having to top up your cooling a lot?
Posted on Oct 05, 2008
Have someone put a radiator pressure test on it .If you can't find the leak then it will be internal.Don't for get to check heater core.
Posted on Feb 18, 2009
OK you have done the engine side of things. If you have an electric radiator cooling fan make sure it comes on when radiator is hot, if not the fan motor is caned or the thermostat switch is faulty. Sometimes the fan motor is supplied by a fused/relayed circuit in which case these items will also need to be checked. Check that not only does the top hose from the engine to radiator get hot but that the bottom one does too. If not this would indicate a blockage perhaps in the radiator core due to sludge. If full of sludge give both ends a flush out with a high pressure hose. Like wise do the same with the bottom hose back to the pump. If the water is circulating and the radiator fan is working then the normal cooling system is working as it should. f the engine is running hot one last thing is to find the EGR valve and check that it is opening as it should. If not the combustion temperatures go very high. One indicator of a hot engine is blue/glazed spark plugs so take one out and check it for signs of hot running. If hot then look to clean the EGR valve and associated exhaust gas feeder pipe with frayed cable, cloth and and carb cleaner spray.
Posted on May 05, 2010
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