toyin

I'm changing the oil pan/pick-up tube on my LY6 6.0 to a 2007 Cadillac CTSV oil pan/pick-up tube. The pan and pick up tube i got didn't have an o-ring when i got it. I hve RED o-ring that was on the truck pickup/oil pump but after looking it says the Cadillac pick-up tube should have been a BLUE o-ring. Im thinking i should use the red one since it was what the original seal the truck oil pumps come with. I need to make sure I have the correct one because I don't want to have to change it out after I install the engine (or even worse damage the engine). Any suggestion would be helpful. TIA.

S10xGN

iTrader: (11)

Seems like if your manual says blue ring for the Caddy tube, that's what you should use. Pump housings are the same, pickup tubes are not...

toyin

Unfotunitly when i got the pan and pick up tube it didn't come with instuctions or with an oring. i just know i have the red one that came off my truck pick up and figure i should use the one for the pump but im not sure? Looks like ill be going to the Gm dealer tomorrow for an oring.

S10xGN

iTrader: (11)

As I said, the pumps are all identical. The swedge on the tube ends are different, you need to match the ring to the tube.

toyin

Thanks S10xGN. Reading comprhention exceeds me today at first i read your posts wrong but i found that the pumps are the same bore and the oring needs to match the tube. Thanks again sorry i read your post wrong.

flintwrench69

iTrader: (11)

I bought a new melling pump & it came with blue & green O-rings. According to their instructions I used the blue one. I have an ls1 pickup tube.

S10xGN

iTrader: (11)

No sweat, pays to get the right one the first time. Some tubes, the ring references on an inner step and will need a thicker ring, some tubes reference on the outer step and use a thinner ring. There actually is a thread on here somewhere that shows all this...