NC TRACKRAT

HELP! Have recently purchased this '98 993 Carrera S w/40k mi. and am going thru normal maintenance. Belt tension is a little too low and started to use 10mm triple sq. wrench but found that some cretin/shade tree mechanic must have used an Allen wrench on it. Hole seems to be rounded and the 12 pt. won't go in. Anyone got any ideas? Should I cut down a 12 pt. to min. length and try to tap it in place? Use a die grinder and cut a slot across the face of the end of the shaft? Not much space to work with. Hate the thought of removing the alternator and replacing same but that's worse case scenario. Any suggestions would be gratefully appreciated.

AOW162435

I would try your first solution (cutting the 12pt tool and tapping into place). If that's a no-go, look here.


Andreas

NC TRACKRAT

Andreas, I saw that "fix" but if I have to go to the trouble of removing the alternator, I'll just replace it with a Bosch re-built unit. If you modify the nose like that, they may not accept the core if & when it does need replacement.

MDamen

I cut down a 12 point tool so I could fit it in and hold the end with a wrench. My 12 point wouldn't go in at first so I rounded the leading edge a bit and tapped it in.

chris walrod

If you do end up getting it loose, you'll have to once again tighten with it. Two solutions -- replace the alternator or install a RS belt hub. Both of which are quite easy to do

AOW162435

Agree. I replaced mine with a reman unit from Sunset - I believe it was $197 or so. I made this tool for the job:






Andreas

NC TRACKRAT

Chris-Intriguing fix w/RS belt hub. Showing my ignorance here: P/N? Installation? Thanks!

NC TRACKRAT

Andreas-
Thx for the pics. I plan on making the same. Hope all goes well.
Stan (NC TRACKRAT)

chris walrod

Here is a thread that shows some intall information
https://rennlist.com/forums/993-forum/315998-diy-alternator-brush-replacement-rs-hub-install.html

NC TRACKRAT

Chris-You've done your good deed for the day...Have a tall one and stay cool. It's 97F and climbing here!
Regards, Stan (NC TRACKRAT)

MDamen

I have the same exact tool that Andreas has. A long 12 point bit, cut off and welded onto a combination wrench.

NC TRACKRAT

Score one for the home team! Thanks to your collective assistance, good triumphs over evil! Paid a trip to Northern Tool & Hyd. this a.m. for their Triple Square set and an el cheapo combo wrench. I think the grand total was something less than $8. Hooked up my trusty Miller MIG and fashioned the tool as depicted and began tapping. When it was apparent that it wasn't going in any further, uttered a nice Sun. a.m. prayer and applied force. The nut gave and my 12 PT. didn't! HooRay! Will install a complete set of new belts and keep said tool in my travel kit. BTW, I assume that everyone carries a 24mm for the upper pulley, 19mm short socket and extension for the crank pulley and a 5mm hex socket for the 3 bolts, along w/spare shims and an extra set of belts. I've been away from Porsches since 1972 and, apparently, nothing has changed! Thanks again for all the good input. Next job will be a new SAI check valve and purge the lines...just to be on the safe side.