Ridgeback08

Anyone installed a Melling oil pump on their LS1? If so what color o-ring did you use? I put one on my 02 TA and used the recommended o-ring, now the damn engine is ticking again.

conan

iTrader: (5)

Blue O ring on my LS1 F-body oil pan and pick up tube.

Black O ring on my LM7 Yukon 5.3L truck pan and pick up tube.

Ridgeback08

Is the o-ring supposed to be put on the pickup tube, then pump and tube put together? I thought the assembly instructions said to put it on the pump side. If I damaged the ring during installation I would think it would cause issues immediately, not weeks later. Do i need to replace with the same size o-ring or one that is thicker?

milkey57

iTrader: (7)

Just did this a month ago on my gto. Ordered a new blue o ring out it on the tube then installed the tube into the pump. No issues here warm idle 40psi

Ridgeback08

I must have put it on the pump side instead of the tube side causing it to not seat correctly. Where did you but the replacement o-ring?

conan

iTrader: (5)

X2

Oil up the O ring slide it on the pick up tube insert pickup tube in the oil pump as straight as possible.

What color O ring was on your original pick up tube / oil pump combo ?

Ridgeback08

Was blue. The new pump came with black and green. I used the green one (incorrectly).

conan

iTrader: (5)

I would pull it back down and check the O ring for problems. Either pinched or too loose. Throw a blue one in there while its all apart. The pick up tube is what determines the O ring.