How am I doing with these compression #s?
04-03-2012 | 12:06 PM
#1
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Joined: Jul 2003
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From: Home of the NIMBYs
How am I doing with these compression #s?
Hi ya,
Based on my earlier thread (loss of power, poor idle): https://www.rx8club.com/series-i-trouble-shooting-95/power-loss-blinking-cel-rough-idle-231376/
I sent the car to my usual Mazda dealership that services the rx-8 and mazda6. They did a compression test. Here are the numbers...
Rotor 1: 8.0, 8.3, 8.1 @234rpm
Rotor 2: 9.0, 8.7, 8.7 @234rpm
I looked up the Workshop manual. And I think it is within specs. But what do you think?
They say I need new coil for Rotor 1. Other coils tested to be fine. Will also be replacing all 4 plugs irregardless.
Car has around 35,000 KM.
Based on my earlier thread (loss of power, poor idle): https://www.rx8club.com/series-i-trouble-shooting-95/power-loss-blinking-cel-rough-idle-231376/
I sent the car to my usual Mazda dealership that services the rx-8 and mazda6. They did a compression test. Here are the numbers...
Rotor 1: 8.0, 8.3, 8.1 @234rpm
Rotor 2: 9.0, 8.7, 8.7 @234rpm
I looked up the Workshop manual. And I think it is within specs. But what do you think?
They say I need new coil for Rotor 1. Other coils tested to be fine. Will also be replacing all 4 plugs irregardless.
Car has around 35,000 KM.
04-03-2012 | 12:10 PM
#2
Those are fantastic numbers. Most new motors come in at mid-8s at 250rpm. Your slightly lower RPM should bias a bit lower than that. So your front rotor is basically as good as new, your rear rotor is better than typical for new.
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