2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Anyway to compression test a motor out of the car?

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Old Oct 29, 2004 | 06:40 PM
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Anyway to compression test a motor out of the car?

I couldn't get ahold of a compression tester in time to test it and I only had the cherry picker for a couple hours. The engine, tranny, and starter are all still bolted together and this weekend I'm going to fill it up with oil and put on the oil cooler.

Could I just take some huge wire and run it directly from the battery to the starter to turn it over or is this a completly stupid idea? Which posts on the starter are negative and positive?

Last edited by Lodivigo; Oct 29, 2004 at 06:43 PM.
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Old Oct 29, 2004 | 06:51 PM
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yeah, u could do that
just clamp the ground to the tranny somewhere... then apply the positive to the both the terminal and the starter signal plug.. that should do it.
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Old Oct 29, 2004 | 07:41 PM
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Originally Posted by Lodivigo
Could I just take some huge wire and run it directly from the battery to the starter to turn it over or is this a completly stupid idea? Which posts on the starter are negative and positive?
Bingo!
Make sure the trans is in neutral.

Negative, ground is the starter case itself.
If you're using a set of jumper cables (easiest), clamp the negative side onto the starter itself.

With the positive side of the jumper cables, touch either of the two terminal posts - only one will work.
Do NOT touch the engine or the starter case with the positive side jumper cable!
Can you say sparks?


-Ted
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Old Oct 30, 2004 | 12:46 PM
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Cool, I wanted to make sure I wasn't about to burn something up, thanks for the info.
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Old Oct 30, 2004 | 11:04 PM
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oh yeah... and also hold the throttle open too.
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Old Oct 31, 2004 | 11:37 AM
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yeah, and also secure the engine somehow if the mount's aren't still attached, or it'll want to flop all over.
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Old Oct 31, 2004 | 12:15 PM
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lol flop excelent word usage!!!
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