19J crank pulley issue (again)

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M

Merryck

Active Member
Posts
121
Hi all,

About a year ago I had an issue with the crank pulley on the 90. It came loose on my way to Kent from the Lake District and I had to be towed home (which was a result, those AA lorries are really comfortable!).

The woodruff key was completely worn away and the only solution for it was a new crankshaft. Instead of that I simply tightened the sh*t out of it and carried on my merry way. It's happened again, and this time the crank is even more buggered than before and I'm not sure there's any way of it going on without wobbling.

Does anyone have any suggestions as to how I could bodge it again? I'm thinking of welding the pulley to the crank, but the rubber damper would suffer and obviously wouldn't be able to be changed once it's on. I'd just like to eke out as much life from this engine as I possibly can without having to rebuild it!
 
Given that you're looking at a new crank or replacement engine anyway, you might try grinding a new keyway and matching slot in the pulley - 180 degrees off the old one.
 
Not a bad idea, I'll have to look at how to go about doing that, thanks!

My only concern is that the crank has been quite badly damaged by the loose pulley. I'll try and get some photos.
 
Same thing happened to a mate who had little dosh at the time.So I tided up the stub of the crank and fitted a new woodruff key in place with chemical metal :rolleyes:and then fitted the pulley with plenty of bearing seal [ its a stronger version of thread lock ] and the bolt with the same.And as an addition I spot welded the bolt to the washer and the washer to the pulley.o_O [ we fitted a new timing belt as we hoped it would not come apart again] motor went on for years. Just was a needs must job
 
That's where I'm at I think. I've seen a cool looking jig on eBay, just a tube with holes drilled in so you can tap threads into the crank and use cap screws as a key. Might be more my kind of solution. I'm not 100% on my ability to grind a new key way into the crank!
 
Merryck said:
That's where I'm at I think. I've seen a cool looking jig on eBay, just a tube with holes drilled in so you can tap threads into the crank and use cap screws as a key. Might be more my kind of solution. I'm not 100% on my ability to grind a new key way into the crank!
Click to expand...
linky?
 
For reference I bought that jig and some decent drill bits and drilled/tapped the crankshaft.

The old damper was quite worn as well and when placed back on the crank with the new 'key' in place it was still loose so I bought a new damper and it's as good as new! I'm not sure how long it'll last, but with the bolt done up tight there is zero movement.

So it seems to have worked well, and saved me having to buy a new crank/replace the engine which is nice!
 
Hey guys, sorry forgot to check back here!

I didn't thread lock anything, and I don't have the diameter or the length protruding, sorry!!
 
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