Alright, I am putting on a new waterpump after an opti install.

I am seeking clarification in regards to some very small o-rings that look as if they fit on the output shaft of the engine (that drives the WP) and inside the coupler. Then another o-ring on the input shaft of the WP and coupler. The coupler actually slips over these o-rings according to a drawing I found somewhere on this site. These o-rings did not come with the WP, had to get them from a GM dealer.

Could somebody clarify if this is correct? I do not see what purpose they would serve as far as sealing anything. I have some pics posted in my album. Hopefully you can view them, this is my first shot at the pics thing.

I had the previous WP fail after about 200 miles recently (a shop installed it) so I want to make sure I get this correct with all necessary seals.

I did not remove the timing chain cover for this project or mess with any of those seals. Any help would be appreciated.

Thanks

 

I asked this same question just about a month ago. The seals are there mainly to keep dirt and crud out of the splines, from what I was told

 

Are these the seals that I hear are so tough to install, where people are using sharpy pen caps to slip them on? If so, I am confused, they slip right on.

 

No, it's the timing cover seal that the pen cap "tool" is used for. The o-rings are to keep the spline connection clean. A little dab of grease in there is a good thing, too.