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I think the jig is up and I gotta pull this motor apart. What do you think?
Its a 94 block with acl race bearings, mtuned rods, supertech 84mm pistons, and a 99 head. The water and oil pump are oe...something like 6k on the motor since it was built I think.
Also while I have everything ripped out should I swap anything out or new seals, bearings, and send it?
Location: Detroit (the part with no rules or laws)
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Yeah, if coolant is getting into the oil, then you need to fix it.
I had some reports of my Miata, but i can't for the life of me find them. Compare your numbers to my 5l race engine(at 40 hours). I should be getting my report back for this last year soon.
Looks like you've been shoving bananas in your valve cover.
Looks like you are very ready for a rebuild. I'd carefully check your bearing surfaces, if they've been digging into your crank or rods you'll need to source new ones.
Awesome, thanks! I asked a couple friends and they didnt really know what to make of it...but one of them told me to just throw the turbo on. I didnt believe him hahaha.
There is a small possibility that coolant-in-oil contamination can come from a leak in the stock water-to-oil heat exchanger that mounts behind the oil filter. If there aren't any other symptoms (smoke, bad leakdown, etc), I wouldn't tear it apart until you've checked that.
150psi compression test, 3% - 7% leakby with a 100spi leakdown teat.
I had a oil in my coolant a few months back, pulled and tested the head, reinstalled with a commetic head gasket and torques the arp head studs to 60ft lbs in 3 stages.
I also tested the stock oil cooler at 100psi (coolant route) and it was good too.
01-10-2020, 05:11 PM
Oil report, is it really that bad?
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