installing intake manifold
Melting Slicks
Joined: Aug 2012
Posts: 3,487
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From: Titusville Florida
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Joined: Oct 2014
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Le Mans Master
Joined: Oct 2007
Posts: 7,451
Likes: 974
From: RI, Now Franklin/Nashville TN
I used the sequence described in the GM AIM for the tightening sequence on my L-82 aluminum intake on the AFR heads on my engine…
From AFR's instructions:
"We suggest NOT using a torque wrench on intake and exhaust manifold bolts, accessory bolts, or spark plugs. Inaccurate torque wrench values can easily strip the smaller threads. Just snug up hand tight with a wrench only".
I just snug tightened with a wrench on my bolts…no leaks. I did use thread sealant on the bolt threads.
From AFR's instructions:
"We suggest NOT using a torque wrench on intake and exhaust manifold bolts, accessory bolts, or spark plugs. Inaccurate torque wrench values can easily strip the smaller threads. Just snug up hand tight with a wrench only".
I just snug tightened with a wrench on my bolts…no leaks. I did use thread sealant on the bolt threads.
2026 Loser of the Year
Joined: Sep 2013
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From: New Or-leens Loo-z-anna
It would be a good thing......after the car is driven a few times.....to re-check the bolts holding the intake in place.
Some gaskets compress causing the bolts to "not be as tight" as they should be, which leads to small vacuum leaks.
And, any bolt with oil seepage around the bolt-head can be removed/sealant added to the bolt threads...then re-install the bolt(s)
(Only remove one oily bolt at a time/reseal the threads/re-install the bolt....then go to the next oily bolt and re-seal it)
Some gaskets compress causing the bolts to "not be as tight" as they should be, which leads to small vacuum leaks.
And, any bolt with oil seepage around the bolt-head can be removed/sealant added to the bolt threads...then re-install the bolt(s)
(Only remove one oily bolt at a time/reseal the threads/re-install the bolt....then go to the next oily bolt and re-seal it)
Le Mans Master
Joined: Oct 2007
Posts: 7,451
Likes: 974
From: RI, Now Franklin/Nashville TN
It would be a good thing......after the car is driven a few times.....to re-check the bolts holding the intake in place.
Some gaskets compress causing the bolts to "not be as tight" as they should be, which leads to small vacuum leaks.
And, any bolt with oil seepage around the bolt-head can be removed/sealant added to the bolt threads...then re-install the bolt(s)
(Only remove one oily bolt at a time/reseal the threads/re-install the bolt....then go to the next oily bolt and re-seal it)
Some gaskets compress causing the bolts to "not be as tight" as they should be, which leads to small vacuum leaks.
And, any bolt with oil seepage around the bolt-head can be removed/sealant added to the bolt threads...then re-install the bolt(s)
(Only remove one oily bolt at a time/reseal the threads/re-install the bolt....then go to the next oily bolt and re-seal it)
