Engine out again
Turbo Mini Forums

Grrrr!!! Bloody a series. When I press my clutch pedal down my engine stalls! it looks like my crank thrust washers are shagged!

Team Racing

bugger.........

tom, you comming down to help? lol

Team Racing

time for a double grey?!?!??!!?!?

AlexF

i know its not the way to go jim but...

could you not have a set made out of some slightly better meterial?

would give you a slightley longer service interval or.............

another mod would be to make up another crank bolt for the timing side, with a larger head

this then would machined to accept a thrust bearing with a stub shaft, the stub shaft woul be mounted to a large heavy duty bracket

and made adjustable to take up the endfloat correctley

this would eradicate the end float for good

just a thougth!

it may inspire you ???
think about it or am i talking B***KS!
BEN:

Interesting stuff Ben (you had a beer?)

Name me one conventional engine (even uprated) that gives as many thrust bearing probs as a high-torque A-series.


None.


Sort out the cause and the solution will sort itself!

Dave, aren't you wondering if I'm going to bring out my thrust bearing pictures again??

I had the same idea Ben, although Dave is totally correct in what he says about getting rid of the root cause of the problem, which is the high clamping (and hence dis-engagement) pressures that seem to be required.

However I don't know much about how you would go about reducing the spring force whilst keeping a high torque capacity, and so turned my thoughts to 'fixing' the problem.

My idea was to see if you could increase the thrust area somehow, coupled with a better spec material. Or the other idea I had was to incorporate a pressurised oil feed from the main bearing into the thrust washer. This would neccesitate having a special thrust made up, that had a diametral groove, so that oil was forced through the clearance gap, thus creating an oil film to take the load and stop the thrusts getting chewed up.
The obvious flaw in that plan is that the thrusts are of course 2 piece, and so to get an effective oil film lubrication working, the 2 halfs would have to fit together VERY well....

Edited by Tom Fenton on 25th Jul, 2005.

wont be the last time you have it out this year jim

I think a better idea would be a new flywheel / clutch setup. Dave how you getting on with this?

Andy, I hate to say it but your right

Team Racing

Wish i had dave!
iam just speculating what may be a decent band aid to help solve the problem

you are right in what you say but...

this would "sort the problem" (for the wrong reasons!)

toms, train of thought could be anotherway to help solve the problem for the wrong reason!

anyone looked at a way to imporve the verto clutch as opposed tothe pre-verto setup? anyone even worked otu the force applied to the thrusts from a verto setup and a pre-verto setup? to compare as a starting point? i know the pre-verto setup is a well trodden path, but the verto setup seems to get dismissed because everyone uses pre-verto, so it mus tbe beter... im rambling, but you get my point :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

...Grrrr!!! Bloody a series. When I press my clutch pedal down my engine stalls! it looks like my crank thrust washers are shagged!...


I had the same problem.
Now one of my thrust washers looks like that:



It was in the gearbox, near the diff...

http://www.minifreunde.at

thats beats Vegard's I think :o

Alex

AlexF

It does indeed :cool:

thats the reason my engines also in pieces at the minute :( cranks off being reground on the thrust face should be back on friday hopefully.

mine wasn't that bad!! luckly I caught it in time, and after changing the thrusts, it all works well again

Team Racing

Hey bu666, Jimster,

What was damaged at you engines?

Was it necessary to change more than the bearings and thrusts (pistons, conrods,...)?

Today i will dismount the crank and check for damage.

Andreas

http://www.minifreunde.at

I just changed the thrusts, everything else was ok. I changed my clutch and pressure plate while I was there

Team Racing

Wouldn't it be possible to run ball bearings instead of thrust washers

Metro turbo weekend driver,Mini turbo in the making again!

No.

The problem is the thrust loading from excessivly (but neccesary) heavy clutch covers.

Would some sort of fixed thrust bearing at the other end of the engine, possibly running on the pully counter act take some of the force that the clutch is exerting and keep it off the thrust bearings>?

how aboout std thrust washers in extra positions????


Alex

AlexF

or adding extra material to the crank and making the area the thrust bearings rest on (and the bearings) bigger?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.