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Old Oct 5, 2015 | 08:43 AM
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Default Ls1 engine problems

Hello everyone. I got a motor from a 2004 GTO with 89k miles. I had a local machine shop rebuild the motor from top to bottom with new piston rings and all new seals.

I have the motor in my 1996 BMW and have put 7500 miles on it after the rebuild. When I compression tested it my numbers ranged from 148-160ish. I will find my compression test sheet.

I feel like these numbers are very poor. I compression tested my other BMW with 120k miles and original motor and I have from 155-160 across the board.

Also when I pulled the motor I drained the oil and smelled like gas. I think the piston rings are having some issues. Half the spark plugs had oil on them and the other half were dry. The motor also has oil consumption.

Can I get some opinions on what you guys think? The machine shop said the numbers are normal and the motor doesn't need to be fixed.

Last edited by GMW96; Oct 5, 2015 at 09:51 AM.
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Old Oct 5, 2015 | 01:21 PM
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Does anyone have an opinion on this?
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Old Oct 8, 2015 | 04:04 PM
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I would post this in the "Internal Engine" section
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