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MG MGA - A little help...

Hello all,

I just finished my driving school (for RMVR) in my MGA. It performed almost flawlessly. I've a few things to work out though and need your help with one of them.

I noticed today that the engine at idle was making a bizarre knocking noise and I isolated it to the crank pully having loosened on the crankshaft.

Why did it loosen - because the lockwasher behind the dognut does not catch the key on the crankshaft. I checked a spare engine I have in my shop and found the same problem. It seems the pully is not fitting onto the crankshaft far enough or is there a special key to be used.

Any ideas?

Thanks!
John

J Bries

"Any ideas" - Yes, Locktite. They all seem to be that way even up through the MGBs. Good luck - Dave
David DuBois

I have seen this problem before and it was not the pulley loose on the crank. What it actually was, was the pulley loose on its "boss" because the rivits that hold it all together were coming loose.
Bob (robert)

Hi John

I have had the same problem as Bob described.

Drilled out the rivets and refastened with a set of 1/4" bolts. Ground down the threaded end of the bolts till they were flush with the nuts and then centre punched on the line of the thread between the bolt and the nut in 3 or 4 places to make sure that they did not come undone.

Loctite would work as well.
Cheers
ian F
Ian Fraser

Many owners replace that tin pulley with a cast iron harmonic balancer from an MGB. John
J.H. Hall

This thread was discussed between 27/03/2005 and 31/03/2005

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This thread is from the archive. The Live MG MGA BBS is active now.