Spark plug torque value??
12-01-2016, 06:26 PM
#21
Le Mans Master
Thread Starter
12-02-2016, 07:34 AM
#23
Le Mans Master
Thread Starter
12-02-2016, 09:55 AM
#25
Le Mans Master
I don't see any big deal with these compression readings. You're 8% difference. My first impulse, I am thinking you might have a fuel injector sticking at #1.
12-02-2016, 10:42 AM
#26
Melting Slicks
12-02-2016, 11:28 AM
#27
Melting Slicks
Member Since: Jul 2010
Location: Tacoma, Wa/Surprise, Az
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I would use a bronze/brass small wire brush if you want to clean the threads off and re-install. You have to be careful though not to leave any broken bristles caught in the tip.
If the plugs are really tight, they may be easier to break loose if the engine is warmed a bit. I haven't had to try this, but I think the aluminum head may warm up and expand a bit quicker, making the plug easier to break loose. This is supposed to work well on the Z06 brake pad screws too, loosen while the caliper is hot. When I replaced the plugs on my Denali at 100k miles, they all broke free without undue strain. The real issue was removing the spark plug boots. I ended up using a shoelace to do that...
If the plugs are really tight, they may be easier to break loose if the engine is warmed a bit. I haven't had to try this, but I think the aluminum head may warm up and expand a bit quicker, making the plug easier to break loose. This is supposed to work well on the Z06 brake pad screws too, loosen while the caliper is hot. When I replaced the plugs on my Denali at 100k miles, they all broke free without undue strain. The real issue was removing the spark plug boots. I ended up using a shoelace to do that...
