4 brave 928ers decided to tackle the 928 Estates leaky rear main seal today! Me, Gerry, Charley and Bill Ball were up to the task....Many thanks for all the help...there is NO WAY I could have done this alone ..... Yet another example of Bill being the best!!!

WOW......what a total PITA..... In theory it is easier to change the rear main seal with the engine in the car by unhooking the bell housing & sliding the TT back (after unhooking the trans mounts)....

However the 1st couple of times Bill did this it was on S4+ automatics...NOT the earlier "circlip" automatic TT like the 928 Estate has....this turned out to be a SERIOUS obstacle!!!!! After much head scratching, improved tools & general drama......we got the new main seal IN!!!!!!

My advice for someone taking this on....PULL THE ENGINE....it just makes life easier.... Enough talk..onto the pics!!

 

looks like fun , you sure drove that seal in

 

The seal is in there really deep...

Dan
'91 928GT S/C 475hp/460lb.ft

 

Ya its just a 16th or so past the chamfered edge so as long as nothing rubs on it.

 

I didn't intend for the seal to go in that deep. We didn't have a suitable driver. In the past I used some metal plate with holes for the flywheel bolts to press the seal in. I couldn't find it. So, we resorted to strikes with a rubber mallet using the old seal to spread the force to drive the seal in. Not ideal. After a lot of lack of success with this method, the seal suddenly went in primarily one side rather deeply. I would have preferred to start over, but there was no removing the seal at this point without destroying it. So, all we could do was even it out, and it ended up seated all the way. The inner lip seems OK and I don't foresee a problem with the seal seated this deeply.

Yes, the 84 was lot more work than doing the same process on my 89 due to the longer TT shaft and circlip holder on the end of the shaft. We had to drop the front end of the TT down because the long shaft was in the way and trapped the flywheel. I didn't have to on my 89. Still, we had the new seal installed in Brian's 84 in about 4 hours including breaks.

http://www.billsworkshop.com/P928S4/seal/seal.htm

 

UPDATE......another 4 hour day under the car with Bill's help and all is well....... After warm up..NO LEAKS......only a couple little things left and the Estate is ready to RACE!!!

 

The thing I miss most about racing is the group efforts to get everything ready. Looks like you guys had a blast.

 

I wouldn't say it was a "blast"....but there is NO WAY I could have done it without Bill......he is the BEST!!!!!!!!!!

However I have learned more building and racing this 928 than I ever could have imagined... It was different than my S4+ experience prior....I kinda like how simple the non-LH cars are...

 

Great job guys!!!

 

1 step closer to race day!!!!