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740 Clutch problem[740-760/1991] posted by Dennis Dueck on
Monday, 18 May 1998, at 7:10 p.m.
I have a '91 740 Turbo which just turned 160,000 Km. At about 138,000 Km, I replaced the clutch because it wasn't releasing. The clutch worked OK for awhile, then occasionally the pedal would not return fully. It felt as though it was spongy and that it would go to the floor without the feeling that the clutch was disengaging. (Although the clutch always released.). I brought it back to the dealer and they replaced the slave cylinder (149,000 Km). Again it worked for awhile and the same problem with the pedal not returning fully. I bled the system myself and it worked better for a few days. Question: Do I have a leaky master cylinder? or is there something faulty with the clutch itself? I'm afraid if I bring it back to the dealer, they will simply keep replacing parts whether it needs it or not.
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Dennis D.
Re: 740 Clutch problem[740-760/1991] posted by Warren Bain on
Wednesday, 20 May 1998, at 6:16 p.m.
Make sure the hose isn't twisted, from the chasis to the slave cylinder. Also
get someone to operate the clutch and see how it runs, so to speak. Check it
when it's cold, and then hot. My '86 740t has 200k miles and about 120k on this
clutch. I replaced it since my throwout bearing was bad. I also replaced the
rear seal at the same time, I was in there so why not. The clutch will last a
long time, if you don't slip it too much. It is after all an art form.
Good luck.
P.S. If you decide to replace the hose, get the right tools, flare tool
wrenches. They are like box end wrenches, but with a small cutout on the end.
wb