For those who have installed ls6 pumps, what color was the o-ring? Mine was blue/purple in color.

The factory o-ring that was black and a little smaller.

 

Old one was blue and looked kinda diffeerent than new one.

 

Mine was green. Stock one and new one I put in. GM changes parts all the time. As long as it fits and is the same thickness, I'm sure the color doesn't matter much.

Have you put the pump in yet?

 

Yes, i put the pump in. I have good oil pressure. little less than 60 at idle, and 70-80 above 2000 rpm.

The reason I ask because I have a ticking noise that will come and go. After I swapped cams, springs, pump, and timing chain, I had a ticking noise that will come and go. The ticking will get oud and then go away. Usually when at operating temperature.

The tapping is coming from the back 2 cylinders on the drivers side. I heard that if you dont get the oil pump o-ring perfect that the oil can be airated (sp). Basically air bubbles in the oil that will cause the lifter to lose there pressure and create a ticking noise.

Just wanted to mae sure I had the right o-ring. The stock black o-ring is a little smaller and thicker than the blue one that came with the oil pump.

However, I would think that the oil pressure would suffer if there was an o-ring problem.