I drive a 98' 3.0 Ranger and for the last 3)of 5,000mi UOA reports showed signs of coolant in the oil but not enough to affect the wear rates. I have controlled it with a product called Iron Tite. Last report showed levels at 323(K) and 109(Na) which is an improvement from the first two. I am at 2,500mi about and think it may have gotten a little worse. I had it pressure tested twice now with no findings and no moisture showing in the exhaust and temps are steady. There is an oil leak which I need to find out where. All cylinders showed compression of 125 except one showed 90psi. I'm thinking #6 back at the firewall on drivers side. With the age and miles of 142,500; I could add more Iron Tite but isn't the heatercore at risk or something. I would like to find this leak. Any help would be appreciated. Thanks
Need help finding mysterious coolant leak
- Thread starter Toaster_Jer
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You won't see the leak if the engine is ingesting it. A tailpipe sniffer in the coolant reservoir will confirm that.
Timing cover gasket. Have done a ton of these over the years
Because the gasket seals the timing cover to block and the water pump bolts to it. So there is coolant flowing through the cover. If the timing cover gasket leaks it can leak coolant externally(ground),internally into the oil or both. They like to leak after being disturbed from a water pump replacement or corroded from lack of cooling system maintenance. They are just a paper based gasket.
Part of my concern is one cylinder is testing 90psi. I also did a cooling system flush on it about 4yrs ago. It,s never gotten hot and never had issues with the water pump. Is there a way to verify that there is a leak to the oil from the gaskets of the timing cover?
Leaktest the cylinders and watch for bubbles in the coolant.
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