12/10/2023 0 Comments Cooling system testerA bulb aspirator is typically used to draw in air from the coolant system to mix with the solution and exploits the fact that the concentration of CO2 in such air from a leaking head gasket is going to be significantly higher than the 0.04% found in the atmosphere. Chemical Test: uses a plug and siphon device to seal off the radiator cap port so that any leaking combustion gases into the cooling system can be suctioned into the device and detected by a chemical reaction which changes the color of a special solution.Less useful in that the compromised cylinder(s) cannot be identified Examples Useful in testing the entire block at once, i.e. The crankshaft may need to be rotated to line up the cylinder head to the proper focal length of the camera to put the surfaces of interest into focus. Visual Inspection: coolant leaking into a cylinder will power wash the carbon off the cylinder head which can be seen and evaluated with an endoscope through a spark plug port as demonstrated here. ![]() Since cylinders are tested on an individual basis one may need to test all cylinders before the failed one is discovered. ConsĬan be inconclusive due to other sources that can also yield compromised cylinder seals via piston rings and/or valves. Useful in isolating the source of a gasket leak at the cylinder level. Again, a compression test is a good indicator. They can also be detected by a compression test, which will check the amount of compression in each cylinder - a failed one will be much lower as the air will be escaping.Ĭylinder-air failures are rare (though you can also get cylinder to cylinder failures, particularly in over-bored engines). They will result in a smoky exhaust (as the contaminant is burnt), and pressurisation of the oil or coolant systems (leading to loss of coolant and the overheating that is commonly the first obvious symptom). Oil-cylinder or coolant-cylinder failures are probably most common. Oil-air or coolant-air failures should be obvious, with deposits of either on the outside of the block. Oil-coolant failures will result in one or both being contaminated - look for a mayonnaise-like substance in the oil (though small amounts of this can also form from condensation, particularly if the engine has been sitting for a while), or oil in the coolant. They can fail between any two (or more) of these, and each has different symptoms. Pressure releasing means the pressure tester can be removed.įix cooling system parts yourself like the radiator, thermostat, coolant reservoir, water pump, and more with many videos for different makes and models in 1A Auto’s video library.There are 4 things around a head gasket - combustion chambers (cylinders), oilways, coolant-ways and the outside air. Twist the connector counterclockwise and unlock it. Inspect parts like the radiator, upper and lower radiator hoses and hose clamps, water pump, thermostat, heater core hoses/firewall, head gaskets, intake gaskets depending on the engine, and the interior carpet near the firewall for leaks If the level drops significantly, there is a leak. If the system holds pressure at the set pressure on the gauge, check the gauge over a span of 30 minutes and see if the pressure has dropped. The slower the gauge drops, the smaller the leak. If the pressure gauge drops quickly, there is a leak. Most cooling systems’ pressure measures between 13 and 16 psi. Keep pumping the pressure tester to apply pressure to the cooling system without going over the system’s psi number on the radiator cap, which the pressure tester’s gauge measures. Apply Pressure to the System without Exceeding the System’s psi by Pumping the Tester. ![]()
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