Spark Plug Torque

[tlwolf]

What is the torque specification for installing spark plugs in a 2011 PCM EX 343 engine? I have found 8 -12 ft lbs on internet but can't definitive answer.

[Paxdad]

25 ft/lb

[tlwolf]

Thanks.
Is that in the manual someplace and I just can't find it?

[jhersey29]

It's a Chevy. Look up Chevy small block 350 torque specs.
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[Paxdad]

It's a Chevy. Look up Chevy small block 350 torque specs.
Sent from my RM-877_nam_att_205 using Tapatalk

Exactly what jhersey stated. The 343 does not have aluminum heads and I believe the plugs have a gasket on them and are not the taper version. In either event 25 ft/lb or even 3/8 of a turn past where the plug seats against the head is the specification.

[tlwolf]

My 2011 PCM EX 343 engine has tapered plugs, no gasket. I think that changes the torque spec

[Paxdad]

10-20 ft lbs for iron heads.

[JayG80]

10-20 ft lbs for iron heads.

Do you reduce the torque 25% if an anti seize is used?

AC Delco plugs have a rebate going up to Sept 30, 2021. Rock Auto.com price for plugs was $40 net after rebate.

[SilentSeven]

AC Delco plugs have a rebate going up to Sept 30, 2021..

Ah...thanks for this. Just bought some 41-101's. $24 back...not too bad. Link to the form.

https://www.acdelco.com/content/dam/...ebate-form.pdf