Clutch ..time for a change ?

[brasil]

… installed the old clutch combo - to compare the numbers .
Result : with the used Valeo Set up from the factory the preload is 0.840 inch / 21,34 mm in this case the steel fingers are looking over the top of the clutch because the clutuch plate is worn .

Looks like I need shims
to bring the preload up to an inch . Hope that summit has 1/2 inch spacer / shim .
If I use this one i am at 0.940 inch /23,88 mm

Longer screws are the smallest Problem we habe billions of metric stuff here

 

[Juice]

There are 3 shim sizes readily available in .060" increments IIRC.
I ended up with the thickest one.
Based on the travel of the throwout bearing, this still put me at the end of travel of the hydraulics. I could have put in a 1/2" shim without any issue.
** Make sure the TOB is centered, the shims raised it past the machining on my trans. I had to use longer bolts, and put a piece of rubber hose (the thicness of the TOB flange) on the bolts to center the TOB. Some masking tape would probably work also.

 

[brasil]

Summit has a 0.500 inch spacer kit … from quarter master .. incl ss line and longer bolts . I think i will buy this kit ..
So the total preload comes out aprox . 0940 inch

 

[brasil]

Quarter Master Kit is on the way to Germania... and some other stuff -FR Bolts for clutch and flywheel...

 

[brasil]

... I am a little confused now. Visited "RAM Clutch " and they call for 0.750 (max ) preload for their clutches... When I made my calculations, I was working with numbers from this forum here....

I don´t want to break the clutch assy.. because even RA is short on clutch TOBs !! FTE, LUK, Sachs.. aso... all out of stock !!

 

[Juice]

Work the TOB (the old one), and see just how much travel it really has. While .750 seems huge, I bet its still just in the middle of the piston travel. Which is like 20 or 30x more than the clutch actually needs to release.
I would simple add .180" to what you got and call it done.

 

[brasil]

went to garage... and here are the numbers of the old TOB. full travel is 1.432 inches exactly.

Do you mean, that I can add 0.180 to the 0.750 that was published by RAM Clutch ? If yes... when I did my math correct.. I come out with a preload of 0.939 ( when I use the 0.500 spacer with the new TOB )
So at the end I am dealing with 0.493 inches that I can use if the clutch will worn out... pretty much the same or close to the numbers I see with the old set-up installed. which is 0.35 of an inch.

so in this case the "safe space "is only 0.14 of an inch... not sooooo much .

 

[Juice]

No. I would add .180" to what you had. No .750" kit.
,.

 

[brasil]

Beside the clutch story... found some "autogram stuff " on my tranny. Never saw something similar on a transmission before..
good or bad ??

 

[brasil]

..

No. I would add .180" to what you had. No .750" kit.
,.

so at least I am at 0.620 ( incl a 0.180 spacer )... thats more or less in the middle of the TOB working area of 1.432 - correct ?

 

[Juice]

Close enough.
That spacing will NOT change the engagement point. To change that, you would need to change piston bore diameter.

 

[Juice]

On the trans markings, the colored marks are factory. The black marker stuff looks like service "logs" by po.

 

[brasil]

Close enough.
That spacing will NOT change the engagement point. To change that, you would need to change piston bore diameter.

I am planing to use the GT 500 Master Cylinder..

 

[brasil]

On the trans markings, the colored marks are factory. The black marker stuff looks like service "logs" by po.

So perhaps the transmission was pulled out before ? Interesting...

 

[Juice]

Looks like oil change mileage to me.

 

[brasil]

..on top of the transmission ? that is real strange...

 

[Midlife Crises]

As far as the preload goes. If you have anywhere between 1/2” and 1” preload on the throwout bearing you are in the golden zone. The clutch will work without issue. If it’s less than 7/16” you may get e little chirping or nibbling now and then and more than an inch and 1/8 may limit the slave travel.

 

[brasil]

@ Midlife Crises Thank you for the numbers... so now I can calculate the perfect preload.



... btw. still waiting for customs clearance here in f.... ing Germany.....