Smoke from exhaust
#22
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#23
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Ok just inspected the wires quickly.. cylinder 3 wire has a funny white mark on it..like shorting or something
and cylinder #2 the plug is loose!! I destroyed the wire when trying to remove it. The plug was finger tight... i swear i torqued them all down to 10 ft-lb. Heres what that plug looks like.
Should i install a new one and should i follow NGK specs for torque or GM?
hopefully this is part if the reason im getting smoke.
and cylinder #2 the plug is loose!! I destroyed the wire when trying to remove it. The plug was finger tight... i swear i torqued them all down to 10 ft-lb. Heres what that plug looks like.
Should i install a new one and should i follow NGK specs for torque or GM?
hopefully this is part if the reason im getting smoke.
Last edited by C5 Diag; 09-09-2018 at 10:20 AM.
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#27
Burning Brakes
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I guess i damaged the wires when i did my clutch install at the beginning of summer... i should have removed them when loosing header
the sharp flange of the header must have damaged it..
the sharp flange of the header must have damaged it..
#29
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Well a loose plug may let extra O2 into the cylinder and cause a lean condition...and possibly low compression...a scan tool can’t tell you it was a loose plug but looking at the fuel trims you can tell...they would be positive...O2 sensors would be seeing a “lean” condition (low millivolts) and the fuel trims go positive...they go opposite !!.. but you have to have a GOOD understanding of O2 sensors and fuel trims. Even a shorting wire you might be able to see that reading fuel trims. I use an oscilloscope to check ignition systems...it’s faster and more accurate... I can look at each bank of 4 at one time and then the other
#30
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torque is 11 FOOT POUNDS (132 inch pounds).owners manual should tell you the gap..,2000 and earlier is .060” and 2001 and later are .040”...with a “cammed” engine I’d ask your tuner..,maybe not yours if they would recommend a different plug...a little anti seize only and use a spark plug wire with a rubber insert (you don’t want to crack the plugs porcelain) and also start the plug with a small length of rubber hose...you don’t want to cross thread the plug. #7 plug can be a bi$$h !!
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CorvetteBrent (09-12-2018)
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#32
Burning Brakes
Thread Starter
torque is 11 FOOT POUNDS (132 inch pounds).owners manual should tell you the gap..,2000 and earlier is .060” and 2001 and later are .040”...with a “cammed” engine I’d ask your tuner..,maybe not yours if they would recommend a different plug...a little anti seize only and use a spark plug wire with a rubber insert (you don’t want to crack the plugs porcelain) and also start the plug with a small length of rubber hose...you don’t want to cross thread the plug. #7 plug can be a bi$$h !!
#33
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Sounds great !!...I use the GM “red wires”... these “0” ohm wires are a bunch of BS !!...don’t waste your money !!...let us know how it goes !!
#34
Burning Brakes
Thread Starter
Spark plug #1 was also loose . Ima torque to 12 ft-lb (144 inch-lb). I did 11ft-lb (132 inch-lb)last time and they are loose WTF...
Last edited by Georgies; 09-09-2018 at 12:19 PM.
#35
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11 is the number in my FSM...what size torque wrench are you using ???...if you are using say a 0-100 ft lb torque wrench it’s NOT going to be accurate at 11 sometimes...I’ve been using torque wrenches in the aviation industry for over 40 years now...if I torque something to say 132 I use a 0-200 inch-lb torque wrench...you want to be somewhere in the middle of the torque range...just snug it down but not to tight...you’ll be fine without a torque wrench !!
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#36
Le Mans Master
Agree with rwobs777... I use a standard torque wrench for mid that unit, and a much smaller one for things with low torque requirements.
#37
Burning Brakes
Thread Starter
Proto 6064C
im going 144 inch pound. I used the same tool last time and my torque wrench was calibrated in 2015. Im the only one that uses it and i take car of my tools.
i know i torqued it to 11 ft lb last time. Thats why im only going a little tighter.
i have a flat spot in both my front tires. Happened when my abs wasnt working and i locked front tires for about 150 feet on the highway.
maybe this slight vibrations along with this bad *** cam caused them to go loose...
#38
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#39
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Proto 6064C
im going 144 inch pound. I used the same tool last time and my torque wrench was calibrated in 2015. Im the only one that uses it and i take car of my tools.
i know i torqued it to 11 ft lb last time. Thats why im only going a little tighter.
i have a flat spot in both my front tires. Happened when my abs wasnt working and i locked front tires for about 150 feet on the highway.
maybe this slight vibrations along with this bad *** cam caused them to go loose...
The following users liked this post:
CorvetteBrent (09-12-2018)