Quick recap included below for the story to date if interested...
Quote:
I had to slip the clutch for a decent distance uphill (my dizzy cap was/came loose, couldn't run under much load, so slipped clutch to get myself to safety to pull over as I was in a dangerous blind uphill corner in a cutting). A few days after I did that, there was a squealing noise from my gearbox/flywheel area as a result.
I found the primary gear bush had scored the crank (likely due heating from slipping clutch) and I figured that was the only issue - everything else seemed in great condition. We concluded I needed to regrind the crank at the primary gear journal to fit a 998cc one. Since the crank was out, I then checked the condition of the main and big end bearings, and most were in great nick, but one conrod big end bearing had some slight marks in it, so since it's apart I now have ACL Duraglide bearings ready to go. It also lead Dr Mini to suggest centre oil pickup.
Thanks for your advice in the other threads:
* Thread on primary gear bush -
viewtopic.php?f=2&t=99457* Thread on crank bearing conditions -
viewtopic.php?f=2&t=99598Now, the story continues...
I decided to go ahead with the centre oil pickup. Lucky I did because when installing it, I found this is the condition of the layshaft
Bearing destroyed:
Shaft:
I wonder how it all happened - maybe the swarf from the primary gear issue cause the layshaft to fail...Maybe they're unrelated issues...Maybe they all happened at the same time... I don't know. But it looks like a gearbox rebuild is on the cards.
If the main shaft is all fine, I might just refit standard stuff. If there is issues throughout, I might refit the box with the Minispares "Evo" stronger gearsets while I'm in there. Does anyone have experience or opinions on these?
http://www.minispares.com/product/Class ... 0to%20shopAlso, I see there are two different layshafts claiming to be high quality. One Aussie made, here it is sold by Minisport Australia
https://minisport.com.au/mini-layshaft- ... rade-steelQuote:
This is the ultimate in layshafts for all 4 syncromesh gearboxes, this suits all morris cooper S/mini K/rod change gearboxes- (Leyland)
You will also require a Pr of CHM141 and 1x HYL8473 bearings to suit
This is Made in Australia (not the cheap chinesse ones), this is high grade steel and will not fail unlike other cheap ones we have used.
PLEASE we do stress that you do not compromize on the layshaft as it one of the most important parts in your gearbox.
And one from Minispares
http://www.minispares.com/product/Class ... 0to%20shopQuote:
Minispares were the first company to produce these layshafts for performance engine/gearboxes as the standard type would flex and result in the breakage of the bearings causing seizure. Produced in an upgraded material and heat treated to the correct core depth they are a must in any straight cut gearbox or helical type where the engine has been tuned. The price of these although quite high is far below the standard type from the OE manufacturer. For 4 synchromesh mini Pre A plus gearboxes only. A plus had 3 steps-see C-22A1739
Any advice on the "Evo" gearset, the best layshaft to use or other comments welcome.
(It's a pre-a+ rod change 4 syncho FYI)