Question about Cars & Trucks
This machine had a new head gasket installed as well as having the head machined last fall. after less than 100 hrs of use, coolant showed up again in the engine oil, so back it went to the shop where they confirmed the head gasket failed with a pressure test. New gasket, head machined again, and now, less than 30 hrs of use later, I've got coolant in the engine oil! This unit has never over-heated, so I don't know why this has happened for the third time. Is there something else responsible for this that is not being addressed? Crankcase breather filter is new. Is the head being improperly machined? Your thoughts would be greatly appreciated.
You should have the head it's self pressure tested when it is off the engine it may cracked .
Posted on Feb 11, 2014
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Posted on Jan 02, 2017
As you've stated driving around town it's fine, and everything is working well. For the symptoms, there are 2 possible causes:
1. Your cooling fans are not working.
2. Your radiator needs to be replaced.
I'm sure you can determine which it is, and I wish you luck on your repair.
Posted on Jun 02, 2009
have a 2000 jeep grand cherokee with 84,000 miles. started having issues with oil pressure gauge going crazy up and down, beeping. had oil pump replaced per mechanics recommendation. didn't help won't hold pressure---only registers about 2. now they tell me i need a new motor!!! just bought vehicle less than 1 yr ago...had carfax clean report!!!!any suggestions?
Posted on Jun 07, 2009
check both lambda sensors for breaks in wires and for open circuit on heater side of lambda sensor on the one under the car on the second cat,failed heater element will not heat gas engough for sensor to read causing false readings , also check for slow i.a.c valve on inlet manifold.
Posted on Oct 01, 2009
Typically would not overheat until enough coolant was lost. Find out if they mag fluxed the heads, or had it done. A lot of shops rebuild without doing this step as it's expensive. If they got a rebuilt head, again they need to know if it was mag-fluxed.
It's harder to mag flux the block while in the vehicle and assembled.
Posted on Dec 12, 2009
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