Author Topic: How to test a pulled motor.  (Read 580 times)

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Thetrader

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How to test a pulled motor.
« on: Mar 22, 2019, 02:58:20 AM »
Okay so I bought a 22r awhile back that had tranny tcase n starter still bolted. I've got it to turn over sounded good n tight. But how can I be certain. Did a compression check but the carb was not on when I got it. Just intake. If I did it correctly 40 75 74 120 on compression. I saved the engine bc I've been looking hard for a 91 yota pickup 4x4 n iv finally got on with a rode thru block. Want to know if I can check it out any better to make sure it's not a junk one.

H8PVMNT

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Re: How to test a pulled motor.
« Reply #1 on: Mar 22, 2019, 04:54:28 AM »
If those are your compression test numbers it's pretty well worn out.  I would either run it planning on it being an oil sucking turd or rebuild it now.  You could see what the plugs look like.
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Snowtoy

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Re: How to test a pulled motor.
« Reply #2 on: Mar 22, 2019, 01:12:18 PM »
I would adjust the valves and see what the numbers are, if 120ish or less, it needs to be rebuilt.
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Re: How to test a pulled motor.
« Reply #3 on: Mar 22, 2019, 02:10:02 PM »
Remember, compression test interpretation changes with elevation. Also as others said adjust the valves first, badly adjusted valves can really hurt your compression.

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Re: How to test a pulled motor.
« Reply #4 on: Mar 22, 2019, 04:05:57 PM »
Engine vertical, any cylinder at TDC

About 1/2 oz of ATF into each cylinder.

let soak.      rotate 90 degrees every 6-8 hours.    add another 1/2 oz.

spin engine with starter to make sure you don't hydrolock.     test compression.

Leak-down test if you can.
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