oil pump O-Ring
10-03-2011, 07:02 PM
#1
oil pump O-Ring quick question for those that have swapped oil pumps. I just put in a Melling M295 oil pump. i used the black O-ring that came with the pump. i lubed up the o-ring w/lucas oil, put it on the pickup tube, put the pump on and rotated the pump onto the tube, then i centered the tube and o-ring and with a slight bit of pressure/using my fingertip as a pry bar on the back and front of the tube it sorta sat or poped into place,,, i then red lock tighted the pickup tube bolt and bolted it to spec... does this sound right??? or did i smash my o ring? dont want to take it apart after its all back together.
Last edited by 3rdCoastPowerSports; 10-04-2011 at 09:22 PM.
10-04-2011, 10:24 PM
#4
the black o ring looked closer to the size of the stock o ring. i tryed the green one but it seemed like it was to large and would require me to force it into place. so i used the black one,,,, just hopen i did the right thing i read a post on hear the other day and i belive it was a MOD who said the black O-ring is for the f bodys and vettes and the green o ring was for the trucks (i guess the LS truck motors came with different pick up tubes)
10-05-2011, 08:05 AM
#6
You're fine. Green is the truck "O"-ring. I have used each on F-body type pump installs. Besides, you'll know if it's an issue when it's started. IMO, there won't be an issue.
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10-05-2011, 11:25 AM
#9
Green = truck
Black = F body/Vette
10-05-2011, 11:42 AM
#11
ok i got some hard info:
Specifics:
1st design) Oil Pick-Up Tube O-Ring 12557752
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")
2nd design) Oil Pick-Up Tube O-Ring 12584922
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")
to translate into the melling Oil pump O rings: the Black O-ring is for 1st design pick up tubes (all models are listed above), the Green O-ring is for the 2nd design pick up tubes (all models are listed above).
Specifics:
1st design) Oil Pick-Up Tube O-Ring 12557752
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")
2nd design) Oil Pick-Up Tube O-Ring 12584922
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")
to translate into the melling Oil pump O rings: the Black O-ring is for 1st design pick up tubes (all models are listed above), the Green O-ring is for the 2nd design pick up tubes (all models are listed above).
10-05-2011, 02:46 PM
#13
if it slid in without forcing it to much and without pinching it then your all good (i asume, then again i asked the same question). but i know alot of guys have used the green one... i was looking at a corvette forum and all those guys said green. i tryed to put the green one on, it just wouldnt fit without really jaming it in there (and i know that aint right), so i put the black one on and it slid in like the stock one
10-05-2011, 07:08 PM
#15
It will take a few seconds to prime. Depending on what gauge you have, it will either be almost immediate (if it's a dummy gauge) or will build pressure after say 10 seconds or so if it's a true pressure gauge. Did you pack the pump w/ vaseline to prime? Regardless, it's fine. Go start it up.
