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Old 06-11-2012, 01:54 PM
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V6 Vortec crate engine problem

I installed a crate marine engine into my boat last summer. By summer's end I was not happy with it's performance. I did a compression test and found some of cylinders half that of the others on one bank. (I should mention that this is a V6 Vortec Mercruiser Marine engine year model 2010 with roller rockers.)

I am not an engine builder; I know enough to be dangerous. The only assembly work I did on the engine was to install the intake manifold (with new gaskets).

This new engine now has about 10 hours on it.

I am assuming that the problem is in the valves, but I don't know.
Where should I start? Thanks!
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Old 06-11-2012, 02:21 PM
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Get back with the ones you purchased the motor from.
If it was GM they have a good warranty. If you touch the wrong thing it could causr the warranty to be void.
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