remove upper or bottom plugs for compression check
03-12-05, 11:47 AM
#1
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remove upper or bottom plugs for compression check
haynes says upper
http://www.rotaryresurrection.com/ says bottom
http://www.rotaryresurrection.com/ says bottom
03-12-05, 10:40 PM
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It really doesn't matter which holes give you higher or lower readings. If you're comparing your readings to Mazda's specs then you need to use Mazda's method. So you should use the upper (trailing) plug holes.
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