corvette95

I am reassembling an engine I didnt take apart. Looking at the parts diagram and service manual....does the water pump pulley and the balancer (frisbee) mount to the water pump via four bolts? The diagram shows bolts and in another view it shows studs mounting to water pump then nuts to the stud after the pulley and balancer are in place instead bolts after pulley and balancer. This is a 89 L98.

ch@0s

Mine was bolted on 91 L98

corvette95

thanks, I dont know why I find two different mounting diagrams

this is as good a picture as I can focus, can you see #90 , 111, and 110

ch@0s

I cant see that
If you would like I can pull one bolt out go to ace and match the size up for ya.I am headed that way later this afternoon. BTW: most of us have left the Frisbee out will no ill effects.

corvette95

thanks for the offer but I have the size per the manual, but the stud and bolt are the same size, I can do either one, just trying to assemble it correctly per the manual.

corvette95

Here is the picture from the 89 service manual. The other picture is from the GM parts diagram

corvette95

and then theres this
Summit sells this

Ray Quayle

Can't help, but this is a bit more clear:

c4cruiser

The exploded diagram may be sort of universal. In the pic it shows both studs and bolts but the listing is for 87-91 cars. My 87 uses bolts.

Maybe the cars that have the "frisbee" use studs to make it easy to align both the frisbee and the pulley up during assembly. Easier to put both on studs compared to trying to line up both holes to get a bolt to start.

WW7

My 89 has studs coming out of the water pump and nuts go on the outside....WW