Quick compression question

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Mar 22, 2008 | 02:54 PM

theedn

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From: Rohnert Park, CA

Quick compression question

when doing the check do you need to take all the plugs out or just the one you have the gage in?

Mar 22, 2008 | 05:56 PM

Project84

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From: Kicking down doors in a neighborhood near you

Just the one you have the gauge in. if you remove the upper plug to install the gauge, then remove the lower plug, it won't build any compression because the air will go out the lower hole.

Mar 22, 2008 | 11:54 PM

Davidov

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From: FWTX

Remove the front and rear TRAILING plugs. If you just remove 1 of 4 plugs, the compression the adjacent rotor is creating will slow down the engine speed and could cause erroneous results.