Drive line vibration

[Gudgeon]

I.ve got a vk, and it has a loud rattle. Got underneath and found the hex headed bolts really loose (all of them) tightened them up and drove like 5 k's and they loose again. Can some one tell me why? Its the 2nd half of tail shaft right after centre bearing.

[1SIKR8]

Are they threads the bolts go into stripped ? Are you doing them up tight enough ?

I'd also try some locktight on the bolt threads and see if that helps

[VK SL 3800]

Your not the first person to have this problem, i cant tell you why some people have them come loose but i heard one bloke have it come loose 3 times and then never again, strange. I would pull the tail shaft out and inspect the threads, give them a good clean up regrease the uni while its apart and loctite the bolts back in, note which way around it was and put it back together the same way as before so its still phased correctly.

[Gudgeon]

Threads r ok, and bolts were tight. Was gonna loctite them but wanted to see if others had probs before I did it. Thanks guys.

[vkberlina]

We had this problem with a tailshaft once even with locktite.

Ended up fitting normal high tensile bolts rather than the allen key ones, fitted some thin washers that were used on the uni end of salisbury shafts that were joined so it would lock 2 bolts together and then you bend the edges up against the bolts, never had the problem after that.

If you get stuck I have some I can post a pic of

scott

[ari666]

i am the opposite. tried to get mine off and no dice. even snapped an allen key and gave up at that point

[Gudgeon]

Its never happened before and now its coming loose heaps, wanna fix it good coz wanna take it to C4C in adelaide, and thats a 450km drive.

[Jonno]

i am the opposite. tried to get mine off and no dice. even snapped an allen key and gave up at that point

its never easy for u is it?

[ari666]

lol. well i need to try things the hard way first

[commy vk]

I.ve got a vk, and it has a loud rattle. Got underneath and found the hex headed bolts really loose (all of them) tightened them up and drove like 5 k's and they loose again. Can some one tell me why? Its the 2nd half of tail shaft right after centre bearing.

I had to use a good quality allen key on the end of an extension bar to undo and then to retighten. I had the shaft removed and in a vise.So far So good,touch wood lol.
The next time I do a center bearing I'll replace the bolts with newies,high tensile of course.

[Darren_L]

i am the opposite. tried to get mine off and no dice. even snapped an allen key and gave up at that point

I've got the same problem.
My CV is leaking grease, so I wanted to pull it apart and re-seal the CV housing. But one bolt just won't come out.
Next step is to get the angle grinder out and cut the head of the bolt off.