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Car Forum / MINI / January 2005Crankshaft pulley coming off!
Hi After a "lower end" overhaul. i.e. Bearings, crank, etc. I drove for approximately 50km when the crankshaft pulley came off!! On inpection, the thick bolt and the pulley were found wedged on top off the engine mounting. I'm off to look for a new/used pulley as the "hole" was damaged. The noise I heard wasn't a slipping fan belt. :( Any ideas what caused the above? Was it just not tightened properly? what can I do this time round? Regards Angelo (1982 1275HLE Clubman) >After a "lower end" overhaul. i.e. Bearings, crank, etc. I drove for >approximately 50km when the crankshaft pulley came off!! I had exactly the same thing after forgetting to fit the locktab washer under the bolt head. Did you also forget this? :-) Scott Wonder what other bis aint been tightenend up :-) Steve. > >After a "lower end" overhaul. i.e. Bearings, crank, etc. I drove for >>approximately 50km when the crankshaft pulley came off!! [quoted text clipped - 3 lines] > > Scott I also had this happen. I had fitted a crank damper pulley and the lock washer was almost impossible to bend over so I left it off. The bolt came loose even though it had been tightened correctly. After that I always used Locktite on that bolt. It's the only bolt that I do that on a Mini. John > Wonder what other bis aint been tightenend up :-) > [quoted text clipped - 7 lines] > > > > Scott I agree,,,,,,,,,,,,Locktite it on,,,, Fitzy >I also had this happen. I had fitted a crank damper pulley and the lock > washer was almost impossible to bend over so I left it off. The bolt came [quoted text clipped - 15 lines] >> > >> > Scott >After a "lower end" overhaul. i.e. Bearings, crank, etc. I drove for >approximately 50km when the crankshaft pulley came off!! >On inpection, the thick bolt and the pulley were found wedged on top >off the engine mounting. >I'm off to look for a new/used pulley as the "hole" was damaged. >The noise I heard wasn't a slipping fan belt. :( >Any ideas what caused the above? Was it just not tightened properly? >what can I do this time round? I had a similar problem some time back on my '76 Clubman Estate. Although the pulley never actually came off in my case, it would work loose very easily. This was all a bit of a mystery until I noticed in the Moss Mini catalogue that two different part numbers existed for the big bolt that holds the pulley on. Yep, you've guessed it: I had the wrong bolt on my car. Although it seemed to fit, and could be tightened up, it wouldn't stay tight. The two types of bolt look the same at first glance, but in fact the threads are different. As I understand it, the Crankshaft pulley and its fixings changed in 1980(?) when the A-plus engine was introduced. A previous owner had fitted an 'late' pulley & bolt to my 'early' engine, and thus created the problem... So, I'd say it's worth checking that you've got the right bolt, pulley, etc. -- Michael. |
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