Pilot Bushing Concern

[NWPzr1]

Hey guys... I'm in the middle of doing a lot of work on a 90 ZR1, one thing being a clutch kit. Car only has 11k miles but there were some weird noises coming from what I figured was just a noisey throwout bearing....

I pulled the trans today and this is what I find....


http://i268.photobucket.com/albums/jj40/roesnerian/1320891445.jpg





http://i268.photobucket.com/albums/jj40/roesnerian/1320891378.jpg



Being the first Z I've ever done a pilot bushing in, this looks pretty scary to me.... especially the way the crank looks ground and worn. How far is the bushing supposed to be pressed in? Flush? Or until it bottoms out?

I can insert the new bushing until it hits the machined surface.... thinking just press it in there, but it's not only a tight fit but tight enough to make me want to post some pics here and ask around.

HOPING there is no damage to the crank! What do you think?


Appreciate any input, thanks!

[LGAFF]

My crank looks the same way.......I have the pilot bushing tool and it drives the bushing 7.8mm into the crank. On my 92 I did it without the tool and drove it in as far as it can go and it seats.

[mike100]

These LT5 bushings are prone to spinning in there and then the softer impregnated bushing metal gets hogged out. I was told that you do NOT grease the fluted pilot bushing as it will worsen the friction when it dries out helping to spin it.

mine was loose at 28k miles, but it didn't make noise.

[NWPzr1]

Thanks for the replies, just to clarify.... the end of the new bushing should basically be butting up against the back section of the crank, as far as the freeze plug?

[LGAFF]

Want to just use the tool I have hell you are right down the street practically.

[NWPzr1]

Sounds good to me, I'd really appreciate it! I've still got your phone number. Would sometime this weekend be ok to come pick it up?

[LGAFF]

Sure......give me a call...

[LGAFF]

You know what I am wrong, this is the tool for the oil cup that goes into the back of the crank. The pilot bearing just gets driven in as far as it goes it will seat on its own....just drive it in as far as you can

[ammrpm]

If you want to know for sure how far it should go in talk to Bill B. the ZFDOC. He can tell you exactly how far it should go in.

send him an email: billb@zfdoc.com

phone: (602) 319-6575

[NWPzr1]

Sorry for the delay guys

Thanks for all the help.... I ended up getting everything worked out, trans is back in. Just waiting on a few other parts and this thing should be done in the next week or two. Then just to hand it off to Marc H. for a few days for the tune. I'll be sure to get a write up posted of my quest for speed in this '90 Z...

Thanks again!

[LGAFF]

Is the owner of this car EXTREME by any chance?