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MG Midget and Sprite Technical - noise on taking up drive...

..not on mine but a friend's. Trying to get a list together of possible causes of a quite loud "pock" noise on taking up drive..more noticeable on over-run. Doesn't sound metallic...
Wire wheel splines; backlash in diff or prop shaft..what else could you sages come up with, please?
Thanks as usual...


[how difficult is it to describe a noise?!]
David Cox

rear shock mounting bolts loose?
GuyW

..yes, Guy..that's a possibility..thanks
David Cox

Just adding to the list. And sometimes it's the more obscure things . . .!
GuyW

A loud "clunk" or "clonk" under sudden acceleration/deceleration was the diff on mine.
Malcolm Le Chevalier

..golf ball rolling about in the boot, Guy?
David Cox

I take it you've had the car up on a jack to look for excess movement in prop, diff, splines &c?
How sure are you it's from the back? Reason I ask is many years ago my brother's girlfriend had a noise like you describe from her Escort which everyone (me included) thought was from the prop/axle/wheel bearings and it turned out to be a fractured engine mount.
"Pock" describes exactly a noise my Sherpa van made coming on and off the power. It took months to find a small tin of WD40 trapped in a body cavity by the rear light cluster.
My grandmother had a Saab which gave a clonk now and then on cornering. The Saab garage said there was nothing wrong, implying she was a silly old woman worrying about nothing. I found it by blind accident when I was crawling around the driveway looking for something I had dropped. I spotted a large pair of pliers straddling the offside track rod. So I might suggest having a really good look in the boot, under the seat &c to eliminate loose items. That golf ball gag might not be far from the mark. These things can be sods to find. I had a worrying tinkly jingly intermittent noise from my midget until I accidentally spotted a few inches of fence wire hooked around the exhaust.

Good luck. I hope it's nothing serious.
Greybeard

Thanks, all...we're on it.
David Cox

I'd suggest getting spanners and socket out to check all nuts, bolts, screws and fixings on the exterior, underside and interior, as Grey has put sounds can travel in mysterious ways.

I spent many months trying to track down a noise and in the process spannered up quite a few bits to find a missing screw that I didn't know about, a few bits that I could nip up (not sure if they really need to) and a loose screw with washer. Once I tighten the last it confirmed what I'd suspected in that I had two noises singing in harmony. The main rattle turned out to be something loose that I thought I'd checked at the very start.
Nigel Atkins

This thread was discussed between 26/09/2017 and 27/09/2017

MG Midget and Sprite Technical index

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