Having problems with your Nissan King Cab ?

I have a problem with a 94 Nissan King Cab XE, 145.8 4 cylinder. The vehicle was given to me so I have very little background on how or when it happened. I was told there was water in the engine oil but saw no sign of water contamination. I found out later the vehicle had been using AMSoil instead of real oil. I performed a compression test when I first got the vehicle and the compression was 90 psi across all 4, after flushing the motor and replacing the oil I had 120psi to 150psi across al

Posted / edited by AnonymousUser on : 22-02-2021

Answers :

It could be either or. the same problem would persist if the head gaskets were seeping or cracked block. The only way to test is by removing the head(s) and having them pressure tested. You can look at the head (where the gasket touches) and see if there is a spot on it that looks like is clean to the metal (everywhere else should be gasket residue). If you loosing coolant then the car is dumping it one of 2 places. The cylinder, then dumping it out the exhaust (has white smoke or smells like coolant or both) or dumping it in the oil pan (will run down the cylinder and past the rings to the oil pan). Either way it will damage themotor. The first signs of a head gasket are not very noticible then as it will still behave normally. When the seep gets larger it will start overheating as the seep will start compressig the coolant causing it to not circulate properly. The next is the oil will become contaminated (not lubricating the motor) and will cause a mechanical malfunction usually bearings will wear first. Changing the oil very frequently will reduce this but it will only get worse as time passes. If you can remove the heads yourself you'll save $100's of dollars by changing the head gasket yourself. I would recommend sending the head(s) out for testing while they are out.
Repair Help & Product Troubleshooting for Nissan King Cab

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