LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Spark Plug Torque specs?

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Old Aug 21, 2008 | 03:55 PM
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Default Spark Plug Torque specs?

Im going to be changing the spark plugs on my car tommorow but before I do that I wanted to ask you guys a question on the torque specs. I have a chilton book on these engines and it tells me that the torque specs on spark plugs is well over 100 foot pounds. But when I bought the plugs the box said it was something like 30 foot pounds. I dont have the exact numbers cause im at work but which one is it? BTW the plugs are ngk's
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Old Aug 21, 2008 | 04:00 PM
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have fun getting a torque wrench down there. wtf! just snug them down. they dont need to be rediculously tight. there aluminum heads so dont go crazy tight on them.


no need for a torque wrench.

Last edited by Badazz 97 TA; Aug 21, 2008 at 04:06 PM.
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Old Aug 21, 2008 | 04:08 PM
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Its my second time changing them, I'ts cramp as hell down there lol, but I just wanted to put them on the right way. I will be going on feel if i cant get the torque wrench in there.
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Old Aug 21, 2008 | 04:12 PM
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WHOA!!! WHOA!!! easy with the 30ft. lbs. you just need to snug it up probably in the range of 10-15 lbs but.

it would be really bad if stripped it out so be careful.
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Old Aug 21, 2008 | 04:21 PM
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I had a feeling they didnt go on so tight, thx guys for the info
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Old Aug 21, 2008 | 04:27 PM
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15ft lbs is the spec...
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Old Aug 21, 2008 | 10:56 PM
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Last I checked they are 11ft.lbs. And are you sure the chiltons didn't say it in in.lbs.? Because over 100in.lbs. would be right.
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Old Aug 21, 2008 | 11:45 PM
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Doesnt have to be exact, just get em' tight and dont strip them out. If you accomplish both then your golden
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Old Aug 22, 2008 | 01:14 AM
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I just came home and I checked the Chilton book and it was 132 in/lbs. And the box on the plugs said 7-14 lb/ft for aluminum heads. You guys were dead on.
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Old Aug 22, 2008 | 12:46 PM
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Don't forget the anti-seize. :O
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Old Aug 22, 2008 | 01:13 PM
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15# - 20# Max
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