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Old 11-01-2017, 04:13 PM   #1
MikeNW
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1997 SL
Default Clutch woes

1997 SL
190,000 miles
clutch replaced with Luk at 107,000

When car is hot, clutch does not disengage fully = hard to shift!
When car is cold, seems to work OK.

I suspect the hydraulic system. Have propped clutch pedal down for 2 days. No leak down.
The "wire" test shows the fork travel at lower limit.

Has anyone experienced failing hydraulic system, when hot?
...
97 SL. Bought 7/07, reluctantly sold Dec 2019
Burgman 400- indestructible beast
Sportster 883- fun bike
Cannondale 29er- daily driver

Last edited by MikeNW; 11-01-2017 at 04:14 PM. Reason: clarity
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Old 11-01-2017, 04:22 PM   #2
OldNuc
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1998 SC2
Default Re: Clutch woes

If you have friction disk drag on the flywheel or clutch cover it will be worse when hot with stroke at minimum.

When you replaced the clutch did you properly grease the input shaft splines?

Clutch hydraulics may be your issue but that is a remote probability.
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Old 11-01-2017, 07:41 PM   #3
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Default Re: Clutch woes

Check crank end-play, the effects of that are worse as the engine oil heats up. Yes, it is questionable if end-play can cause clutch problems, but it is a really easy test to do; why not humor me? I'm not looking for an accurate "dial indicator" check, just look for very gross movement of the crank.
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Old 11-02-2017, 09:23 AM   #4
MikeNW
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1997 SL
Default Re: Clutch woes

"When you replaced the clutch did you properly grease the input shaft splines?"

Don't remember, but probably, it was summer of 2008 when I replaced the clutch.

What grease would you use?

I have a spare hydraulic assy. Will slap it on and try it before I R&R the clutch.

Thanks
...
97 SL. Bought 7/07, reluctantly sold Dec 2019
Burgman 400- indestructible beast
Sportster 883- fun bike
Cannondale 29er- daily driver
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Old 11-02-2017, 10:21 PM   #5
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1998 SC2
Default Re: Clutch woes

One of the odd hard to locate synthetic single compound greases and not the usual oil in a soap base. Syl-Glide will work. There are very fine grooves cut into the top of each input shat spline to hold this lube. If it gets skipped then the friction disk eventually lightly sticks to the flywheel even when clutch is released. When installing clutch the friction disk splines must be cleaned of factory waxy grease and the input shaft splines lubed. If the hydraulic is not making more than min stroke this sticking becomes an issue. Swapping hydraulics is a good place to start.
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