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If your customer said his car overheated and you determine the water pump thermostat and belt needed changing is it customary to do a compression test not a pressure test before doing it?
Wiki User
∙ 10y ago
I would not have done a compression test unless I noticed a running problem or the customer complained of one.
Wiki User
∙ 10y ago
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How do you determine if your car has a blown head?
run compression check on it
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use a compression tester.
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compression and rarefraction
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Remove all the spark plugs and turn the engine over by hand. Place your thumb over the #1 plug hole and you will feel the pressure on the compression stroke. A compression gage will also tell you when you are on the compression stroke.
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Try to determine the origination of leak i.e. radiator, hose, thermostat housing etc. Try to determine the origination of leak i.e. radiator, hose, thermostat housing etc.
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You can have a compression test done on the engine to determine the condition of the rings and valves.
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A compression test will determine which cylinder(s) are at fault.
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When the car is hot, squeeze the upper radiator hose. If it feels soft, then the thermostat is not opening and therefore bad. If you squeeze the hose and its hard to squeeze, then it is pressurized and the thermostat is open. That is one way to check if the thermostat is stuck closed. If the thermostat is stuck open, then in cold conditions the car will take a long time to produce hot air from the heater.
