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 Post subject: Lower crankcase reseal
PostPosted: Sun Oct 01, 2017 4:52 pm 
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Year and Trim: 2005 Bonneville GXP
I am resealing the lower crankcase seal on my 2005 GXP and need the torque specs (ft lb & degree) and tightening sequence for the crank main bearings when reinstalling the lower half of the block. I have searched the forum for a previous post but have been unsuccessful. Any help would be very much appreciated.


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PostPosted: Mon Oct 02, 2017 1:36 am 
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Joined: Wed May 13, 2009 10:45 pm
Posts: 5527
Location: CHICAGO
Year and Trim: 2006 STS-V, 2004 GTO, 2009 G8 GT
First Pass = 15 lb/ft
Second/final pass = 65*

Sequence;

First is the outer bolts on each main and you're starting at the center bearing, and working towards each cap out from the center, alternating each end.
-Start at center bearing cap outer bolt, front side of block
-Second is the outer bolt on the opposite side

Move to the next cap towards the back of the engine
- Front side, outer bolt
- Outer bolt opposite

Move to the next cap towards the front of the motor
- Front side outer bolt
- Outer bolt opposte

Move the last cap at the back of the engine
- Front side outer bolt
- Outer bolt opposite

Move to the last cap at the front of the engine
- Front side outer bolt
- Outer bolt opposite

Repeat this sequence for the inner bolts. Then repeat the sequence for the second/final pass.

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PostPosted: Mon Oct 02, 2017 5:57 am 
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Joined: Sun Oct 01, 2017 4:43 pm
Posts: 3
Year and Trim: 2005 Bonneville GXP
Thanks, that is exactly what I was looking for.


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