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Today I was driving my freshly rebuilt engine around and feeling out the car and after I got home I let it cool down to check the oil and when I did it had some coolant at the bottom of the dip stick mixed in it and I checked the fill cap and it was milky as well im hoping it’s just the oil cooler since I had everything pressure tested and magnafluxed at the machine shop but just for reassurance what do you guys think I could be
Last edited by Brandon Fluharty; 09-07-2021 at 05:59 AM.
Normally, it's bad oil cooler seals in the oil filter housing.
While it could be Head or Head Gasket related (being a newly rebuilt engine) if they/you reused the gaskets and O-Rings, or possibly even shifted parts to cause those items to lose their seat, they will cause this.
Normally, it's bad oil cooler seals in the oil filter housing.
While it could be Head or Head Gasket related (being a newly rebuilt engine) if they/you reused the gaskets and O-Rings, or possibly even shifted parts to cause those items to lose their seat, they will cause this.
I used a brand new head gasket and the head and block had both been resurfaced so I really don’t think that’s the issue but I’ll rent a compression tester just to see I guess
I used a brand new head gasket and the head and block had both been resurfaced so I really don’t think that’s the issue but I’ll rent a compression tester just to see I guess
Good idea, a compression test is much simpler than replacing oil cooler O-Rings, then finding out they aren't the problem...
Good idea, a compression test is much simpler than replacing oil cooler O-Rings, then finding out they aren't the problem...
Good Luck
alright so I did a compression test and the first two cylinders where at 140 the third was at 150 and the fourth was at 120 the jump from 140-120 is bothering me could that be my problem?
alright so I did a compression test and the first two cylinders where at 140 the third was at 150 and the fourth was at 120 the jump from 140-120 is bothering me could that be my problem?
While a 20-30 psi difference isn't great, I can understand your concerns being a rebuilt motor.
just curious, did that plug look any different? If there's a small crack in the head at a water jacket, that plug would be (in theory) cleaner than the others from built up steam.
Honestly, if there's enough coolant to be noticeable on the dipstick, I would think the loss would have been greater, and there would be noticeable extra pressure in the cooling system.
Update after driving the car to work only maybe 2 miles at most the oil has gotten a lot whiter no bubbles in the overflow and hasn’t over heated or started knocking I’m going to drain the oil soon to see how bad it is and do an engine flush as soon as my cooler comes in
Just don't drive it anymore with the watered down oil in it, that could wipe out a bearing QUICK.
I’ve dumped the oil already I’m about to put more in and cap off the coolant hoses that go into the heat exchanger to try and figure out if that’s the issue
09-06-2021 | 07:16 PM
