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Low compression engine "done blowed"

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Old Mar 6, 2018 | 06:15 PM
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Emmoe's Avatar
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Low compression engine "done blowed"

So, after coil, plugs, ESS module, MFA module (chasing codes) and advice on compression from the forum (#1 90psi, #2 70psi),I got the car running. Power was lacking, missing on one rotor, but fine over 6000 rpm. Lots of smoke. Smooth and powerful over 6 grand, pulled home in a cloud of steam and smoke. Found about all coolant draining out along with 3 quarts of oil! Will crank, but no start.
Did I blow it up?
Ordered a 35,000 mile engine today!
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Old Mar 6, 2018 | 06:21 PM
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From: BALLS DEEP
its blown. did you get a comp test on your used engine?
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Old Mar 6, 2018 | 06:26 PM
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Can return.

Comes with starter, will test. What should be acceptable?
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Old Mar 6, 2018 | 06:27 PM
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From: BALLS DEEP
you bought a used motor without a comp test? good luck
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Old Mar 6, 2018 | 06:31 PM
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From: BALLS DEEP
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Old Mar 6, 2018 | 11:40 PM
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It's usually not recommended to get a used Renesis.

Hopefully it comes with a warranty that you can actually use...
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Old Mar 7, 2018 | 12:58 AM
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From: BALLS DEEP
Originally Posted by UnknownJinX
It's usually not recommended to get a used Renesis.

Hopefully it comes with a warranty that you can actually use...
buying a used renny without a comp test is about as smart as going down on/raw doggin a hooker
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Old Mar 7, 2018 | 06:36 AM
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From: 2017 Miata RF Launch Edition
Originally Posted by Emmoe
Found about all coolant draining out along with 3 quarts of oil! Will crank, but no start.
Did I blow it up?
Ordered a 35,000 mile engine today!
WAT? Are you saying you have massive coolant and oil leaks? Like, it's leaking onto the ground?

Originally Posted by Emmoe
Comes with starter, will test. What should be acceptable?
Compression tests have to be done with the engine warm. Doing them cold will give artificially high numbers.

This is why used JDM eBay engines never have compression test numbers even when they're fully dressed with transmission and starter.

There's also a reason why these engines never come with a warranty beyond "will start".

I wish you the best but you've taken an awful risk.
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Old Mar 7, 2018 | 04:39 PM
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And you can't properly compression test a cold engine out of the car.
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