Mini update from work over the weekend.
I got the oil pan off the motor. Decided it was easier to take the hood off and hoist the motor up a few inches than drop the rack. However, my confidence in the cheap/easy fix is shaken. The oil pump pick up tube o-ring looked to be in perfect shape and installed correctly. Just to be on the safe side I picked up two new o-rings from the dealer on the way to work this morning.
GM makes 3 different sized o-rings. My online reading has shown that all of the oil pumps are the same size but that the pick up tube itself has different sizes and you match the o-ring to the pick up.
Stolen from a 2009 Ls1tech.com post:
Quote:
They are color coded for a reason, like stated above, if the pickup tube has a recessed area where the o-ring goes you need the thicker RED o-ring. The trucks use this design.
GM Oil Pick-Up Tube O-Ring (1st Design)
12557752
BLUE SEAL
Specifics:
* Oil Pick-Up Tube O-Ring ea.
* Chevy/GMC Pick-Up (1999-2000 LS V8) 1st design
* F-Body (1998-2002)
* Cadillac CTS-V (2004-2007)
* Corvette (1997-2008)
* Thickness = 3.55mm (0.140")
ID = 23.60mm (0.930")
GM Oil Pick-Up Tube O-Ring (2nd Design)
12584922
RED SEAL
Specifics:
* Oil Pick-Up Tube O-Ring ea.
* Chevy/GMC Pick-Up (1999-2000 LS V8 engines with 2nd design pick-up tube)
* Trailblazer (2003-2008 With LS V8 engine)
* Hummer H2 (2003-2008)
* Hummer H3 (2008 With LS V8 engine)
* Chevy/GMC Pick-Up (2001-2008 LS V8 engines)
* W- Body (2006-2008 With LS V8 engine - Impala, Lacrosse, Grand Prix)
* Thickness = 4.20mm (0.165")
ID = 20.69mm (0.815")
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The green I believe is even thicker than the red design but can't find those specs right now.
My Autokraft pan came with the blue o-ring but I bought both a blue and red o-ring today at the dealer. The fit with the blue o-ring that came with my pan just doesn't feel that snug when playing around with it this weekend. So tonight I will try both the red and blue o-ring. My online research showed some folks and shops/dealers using the red o-ring even in fbody/corvette applications with better success rates.