Think I've b******d it!

kitekrazy · Jul 21, 2010

You'll love this!
got a vibration when driving, not then dethrotling, coming from prop shaft and steering (whole car shakes a bit). when stationary the engine sounds (?) OK, but I think it's rev related. the fault has been growing the past two weeks and getting worse, so suspect big ends! Any suggestions???

The Mad Hat Man · Jul 21, 2010

yu have checked the Prop shaft UJ's and the A frame joint?

Beast o Bodmin · Jul 21, 2010

burn it.

kitekrazy · Jul 21, 2010

Thanks Beast of Bodmin, love you too!!!

It might come to that yet....

Mad Hat Man, not check these yet, hope to put it on some wheel ramps this weekend and see. thanks for the suggestion, any other areas?

The Mad Hat Man · Jul 21, 2010

yu dont need ramps - jusr crawl underneath it and try rotating the propshaft - yu will feel if there is any play. chock the wheels, coz its best to do it without the handbrake on. better still use a screwdriver to try and rotate the joints.

bmp42 · Jul 21, 2010

check the front drive flange out of the transfer box - as the bearing does fail, easily done whilst checking for any "lift" in the prop shaft uj's. It can also be changed in situ.

sp33der · Jul 21, 2010

Doesn't sound like big ends! Big end bearings gone makes a helluva racket and generally the engine stops and yer oil pressure drops....that's what happened on my VN750 anyway!

oldskool · Jul 21, 2010

kitekrazy said:
You'll love this!
got a vibration when driving, not then dethrotling, coming from prop shaft and steering (whole car shakes a bit). when stationary the engine sounds (?) OK, but I think it's rev related. the fault has been growing the past two weeks and getting worse, so suspect big ends! Any suggestions???

Big end failure wont make car vibrate just a knocking noise, as has already been said ide check your prop shaft u/j's for slack/rotational movement although a seized u/j will cause vibration but wont normaly have any slack init, you will have to remove the prop shaft to check it.

broadoakboy · Jul 21, 2010

I had that and it turned out to be a slightly flat/worn patch on the offside rear tyre, new tyre solved it.

oldskool · Jul 21, 2010

broadoakboy said:
I had that and it turned out to be a slightly flat/worn patch on the offside rear tyre, new tyre solved it.

Wouldn't that make the car vibrate all the time

he said it doesn't do it when he throttles off.

Pikey · Jul 21, 2010

my guess is worn rear radius arm bushes..

broadoakboy · Jul 21, 2010

Good point, now I think about it, mine got better under acceleration and worse when off the gas.

kitekrazy · Jul 22, 2010

Didn't have time to look under last night, seeing tame mechanic at the weekend, will go armed with your comments!!!
Many thanks, P.

kitekrazy · Jul 26, 2010

OK, so it's the UJ's on the prop shaft thats naf, but the exhaust banging against the chassis didn't help!
Many thanks to all that commented, much appreciated.
Regards, Peter.

Think I've b******d it!

kitekrazy

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The Mad Hat Man

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Beast o Bodmin

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