| Author |
Message |
Verell Boaen (Verell)
Member
Username: Verell
Post Number: 972
Registered: 5-2001
| | Posted on Thursday, July 17, 2003 - 10:32 am: | |
Thanks JRV.
It's obvious (now that you explained it). Don't think I've ever seen it posted anywhere tho!
If we can get some rod length measurements of new vs worn to limit then we'll have a very good, easy to use check!
The measurements will have to be made with the clutch adj exactly to spec of course.
I suspect that the meas will probably be different depending on whether or not the car has the pedal force reduction design change.
re:"Not that measuring an installed disc could matter"
Why(pardon my ignorance)? Isn't the pressure plate-flywheel gap a direct measurement of total clutch system(ie: driven disc + pressure plate & flywheel) wear?
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JRV (Jrvall)
Intermediate Member
Username: Jrvall
Post Number: 1946
Registered: 11-2002
| | Posted on Wednesday, July 16, 2003 - 2:57 pm: | |
>>Is the bottom line to use the limited viewing pressure plate hole Peter describes?<<
Not that measuring an installed disc could matter, however, it is SOP to use Adjustment Rod Lenght to determine general clutch condition and amount of use left. Very Long Rod = New Clutch, Very Short Rod = Worn Clutch.
I think that's it, or vice versa.
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Verell Boaen (Verell)
Member
Username: Verell
Post Number: 969
Registered: 5-2001
| | Posted on Wednesday, July 16, 2003 - 2:45 pm: | |
Is the bottom line to use the limited viewing pressure plate hole Peter describes?
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Verell Boaen (Verell)
Member
Username: Verell
Post Number: 953
Registered: 5-2001
| | Posted on Sunday, July 13, 2003 - 11:36 pm: | |
Thanx,
We probably missed the hole.
We were ratcheting the flywheel around using the flywheel teeth & a small pry bar, my large metric sockets were temporarily inaccessably buried so we couldn't use the damper bolt head to turn the engine around. We'll use it next time. |
'75 308 GT4 (Peter)
Advanced Member
Username: Peter
Post Number: 2914
Registered: 12-2000
| | Posted on Sunday, July 13, 2003 - 10:40 pm: | |
Okay, nothing scientific here, or possibly correct, but the last time I checked (note: I have one of those George Evans AP clutches in my car...), there was a hole in the body of the pressure plate which allowed some viewing of the disc. Limited and I certainly couldn't get some kind-of measuring device in there.
FYI, the GT4 WSM calls for disc thickness without load of 9.2 - 9.5mm, under load of 8.5mm. Wear limit is 1mm. My inspection (eye only through that hole) revealed its still got some meat left. |
Jonathan (Birdman)
Junior Member
Username: Birdman
Post Number: 70
Registered: 6-2003
| | Posted on Sunday, July 13, 2003 - 8:12 pm: | |
Thanks again for the help Verell...they sure don't make accessing the clutch linkage that easy. I'm quite sure that when they designed the car they decided to make everything really hard to work on so nobody would attempt it themselves!
I thought I read something in the archives about being able to measure the clutch thickness through the inspection port too.
Anyone done it? |
Verell Boaen (Verell)
Member
Username: Verell
Post Number: 947
Registered: 5-2001
| | Posted on Sunday, July 13, 2003 - 12:07 pm: | |
I was helping Jonathan adj. the clutch in his 'new' '77 308 GTB.
I thought there was a way to measure the thickness of the driven disc thru the bell housing inspection port. However, we couldn't spot an opening in the pressure plate housing to measure the gap between the edge of the pressure plate & the flywheel.
Did we overlook something, or do you have to pull the bell housing to measure the wear?
Could have sworn I saw something a while back, but no luck with the archives. |