compression test results?

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dopeassjackson

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Mar 13, 2009
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i bought a JDM 7mge engine last week and did a compression test. the pressure is between 226 and 236psi. this is a long block with no belts on it and only a auto trans flex plate. is the lack of draw from the accessories why its reading so high?
i have the head off now and dont see alot of carbon build up or any thing major. the engine is preaty clean on the inside.
 

supradragontoy

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May 1, 2009
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dopeassjackson;1320961 said:
i bought a JDM 7mge engine last week and did a compression test. the pressure is between 226 and 236psi. this is a long block with no belts on it and only a auto trans flex plate. is the lack of draw from the accessories why its reading so high?
i have the head off now and dont see alot of carbon build up or any thing major. the engine is preaty clean on the inside.

It would make sense that compression would be created faster with no accessories on the motor, but compressions compression. It should read somewhere in the 150 range if I recall correctly for the 7m. Super high readings like that would lead me to believe you have a stuck valve or something. Is it reading high across all 6? Maybe someone f*d up on the machining?:3d_frown:
 

jdub

Official SM Expert: Motor Oil, Lubricants & Fil
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Feb 10, 2006
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Excellent question...thread is closed.

Poodles - Next time you see something like this, you can help us out by using the "report post" feature icon (red outlined triangle) in the user box on the left. It gets sent to the Mod forum immediately ;)
 
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