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Brand new throwout bearing and clutch smashedsad smiley

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Jan Kruber Avatar
Ballerup, Copenhagen, Denmark   DNK
I pulled my engine out today and got confirmed that the "squeek" sound actually was the throw out bearing having said good bye. It allso has destroyed the clutch "foot". The clutch kit with bearing is only 450 miles old! Now, how on earth could that happen? I have only used the clutch when shifting gear, newer in idle, allways shifting into neutral and foot off the pedal when idling. ALL the clutch parts apart from the release arm and padal are new parts.
Please notice on the picture at the bottom, the new bearing surface is not on line with the fixing bolt bush, just a little, but could this be the cause or not at all? The reason for this misalignment is plain wear in the right hand fork, where the bearing rest.
Or have I just been unlucky to receive a bad part or what do you guys think? Any Midget experience in that out there? I'm in contact with the supplier, I'm excited what they say.



Mightymidget



Edited 3 time(s). Last edit at 2017-07-11 02:24 PM by Jan Kruber.

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ice Avatar
ice Gold Member Larry Ice
Lawrenceville, GA, USA   USA
Jan, looks like parts had an internal defect when they were installed.
Both the bearing and the pressure plate flange looked like there was some reason for failure besides anyone's assembly of the parts. Hope the seller will work with you on replacements!



Iceman

Atlanta GA

60 AH MK1
62 AH MKII
67 Midget
71 Midget

Midgies Dad Avatar
Midgies Dad Ben M
York, Maine, USA   USA
When you replace the clutch components, also replace the clutch fork, its bushing, and its bolt.

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S1 Elan Kurt. Appley
Akron, Ia., USA   USA
In reply to # 3549685 by Midgies Dad When you replace the clutch components, also replace the clutch fork, its bushing, and its bolt.

I agree. A new bolt and bushing at the least and maybe a bit of straightening. I've experienced similiar bad luck when the TO bearing wasn't exactly concentric with the rotating parts.

Kurt.

daveg Dave G
Cleveland, ohio, USA   USA
Did you use the t/o bearing clips? I do not see them.

CtMGDude John R
New Fairfield, Ct, USA   USA
I would go with the bearing set up, instead of the friction set up. Longer life, more modern set up. Peter May Engineering is the one I would go for now, though I used a new friction pad set up with a new clutch and it has lasted 8000 miles without a glitch. When I take out the engine/tranny, I will see how much it is worn. I'll Probably go with the Peter May set up if it worn all the way. This is a preference thing, it would be good if someone chimed in with actual experience. I know a few racers that used Peter Mays set up and say they would never go back. If the engine or tranny has been modified in any way, then you have to make sure it's concentric, as the Peter May bearing rides on the clutch tongs, the piece used for the stock set up is removed. Just an observation.

https://www.petermayengineering.com/specialistProducts.htm#5.6



Edited 1 time(s). Last edit at 2017-07-11 12:31 PM by CtMGDude.


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Jan Kruber Avatar
Ballerup, Copenhagen, Denmark   DNK
In reply to # 3549685 by Midgies Dad When you replace the clutch components, also replace the clutch fork, its bushing, and its bolt.

New fork allready ordered smiling smiley



Mightymidget

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Jan Kruber Avatar
Ballerup, Copenhagen, Denmark   DNK
In reply to # 3549847 by daveg Did you use the t/o bearing clips? I do not see them.

Yep, the clips were there......



Mightymidget

Jan Kruber Avatar
Ballerup, Copenhagen, Denmark   DNK
Before reassembling the whole lot, new clutch kit (again), release arm, clips, bolt etc. I would like to check two distances, maybe one of you helpful people know? What is the approx. A distance I should go for with the clutch not engaged and what is the distance B ?



Mightymidget

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S1 Elan Kurt. Appley
Akron, Ia., USA   USA
Jan, the clutch carbon TO bearing is supposed to ride on the clutch pad all the time. The measurements would be the same and would be dependent on clutch wear.

Kurt.

lewmac Avatar
lewmac Silver Member Lew McAllan
Hawthorn Woods, Chicago, IL, USA   USA
1958 Austin-Healey 100-Six ~ For Sale ! ~
I went with one of these from Colin Dodds in Australia. High quality, long lasting, read the description as he describes same issues you have seen with carbon bearings.

http://www.ebay.com/itm/clutch-roller-release-bearing-Austin-Healey-Sprite-MG-Midget-MGA-MG-TC-TD-TF-ZA-/181896540574?hash=item2a59e0f19e:g:0uIAAMXQ9MVRhuUD&vxp=mtr

Cheers
Lew

rsawyer Randall Sawyer
Tulsa, Oklahoma, USA   USA
I know I watched a video with John Twist warning against using roller bearings. The issue was that the bearing doesn't travel in a straight line so rather than the bearing spinning, it's just metal rubbing against metal through some of the stroke. Is this not the case with Spridgets? I am quite curious because I will be changing my clutch and throw out bearing in the near future.

Kerr Avatar
Kerr Platinum Member Norm Kerr
Ann Arbor, MI, USA   USA
after reading the other threads in the archives here, written by people who've tried the roller bearing throw out bearings, there seemed to be problems with noise when using them, due to the different geometry a roller bearing needs than what the original carbon bearing was designed to use, so unless the arm is also replaced, or a sleeve adopted around the splined shaft, it can rub or something like that...

Lew, has yours worked out well over time? How many miles on it so far?


N

S1 Elan Kurt. Appley
Akron, Ia., USA   USA
No one can dispute that the quality isn't what they used to be but the use of a roller bearing where it wasn't designed to be is a problem as well. Where the roller bearing is used it is designed to slide on a sleeve that keeps it perfectly concentric. Our cars aren't made that way. Some input from folks with a long time use of the rollers is needed.

Kurt.

ice Avatar
ice Gold Member Larry Ice
Lawrenceville, GA, USA   USA
Second that opinion! The bearing throw out bearings are a bit pricy over the graphite ones. I would like to hear some experience others have had from them.



Iceman

Atlanta GA

60 AH MK1
62 AH MKII
67 Midget
71 Midget

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