crack noise

[SILICONE KID]

Just started to get a loud crack noise from some where underneath the car.It seems to happen on rough ground and certain angles when im driving the car.Any ideas..im thinking the rose jointed drop links but they have been fitted for ages and the front end as a complete set of poly bushes fitted only last year.

[domV8]

Daz,

I have had this - in my case, the rose joint in question had been fitted too tight I am told (apparently they need to be able to move slightly)...

This resulted in some sort of wear (very quickly, 2-4 months?) and play of about 1.5mm - I know that is a tiny gap, but the volume of the sound it makes is unbelievable, sounds like the whole suspension on that side is loose and clonking....

But apparently its only moving a tiny bit...

In my case, the worn part (one of the joints) can be replaced - and costs (brace yourself) a whopping £8...

So hopefully it's something as simple as this for you..?


HTH,


Dom

[andy-w]

Mine used to make a crack sound when turning onto the drive and turning left corners...

the diagonal brkt on the rear lower wishbone that the anti roll bar drop link bolts to had split....cut it out and fabricated a new one and then welded it back on and the noise stopped....!!!

[SILICONE KID]

Mine move freely but the near side rear drop link does not sit straight ,may be i need to move the anti roll bar across a little..all the wishbones are nice and tight with no free play..i have just lifted to front and rear ride height to 140mm front 152mm rear ..this may help.Put a spirit level on the wishbones and they sit perfectly level..

[andy-w]

SILICONE KID said:

Mine move freely but the near side rear drop link does not sit straight ,may be i need to move the anti roll bar across a little..all the wishbones are nice and tight with no free play..i have just lifted to front and rear ride height to 140mm front 152mm rear ..this may help.Put a spirit level on the wishbones and they sit perfectly level..

Take the rear AR bar off and go for a spin...its a quick job and will rule that out if the noise is still there???

[SILICONE KID]

Done that,the noise seems to be coming from under the gear box area.Im thinking maybe its those poly bushes near the exhaust manifold.I was warned about these type bushes... they don`t like heat.I have even insulated around the top bush..TVR ownership

Edited by SILICONE KID on Friday 15th April 23:46

[darkcat]

i get all sorts of creaking noises - TADTS.

[SILICONE KID]

Just found a problem this may be the cause..Both rear wheels have free play,i removed the wheels to find the large nuts are loose.The hubs were changed for the cosworth brake upgrade also a new bearing kit with two large nuts..They were fitted and a torque wrench was used when the mechanic did the work.What stops the nuts coming loose..They are nyloc nuts!

Edited by SILICONE KID on Saturday 16th April 13:14

[ray von]

What did they torque them up to? iirc 240lb/ft is around what you need. Are they also handed, any chance shafts have been swapped side to side?

[SILICONE KID]

If the shafts have been swopped over would this be the cause of the loose nuts..I don`t fancy driving with only 2 front wheels !Both nuts tighten up clock wise..

[ray von]

Just been havin a think. I seem to recall that some are not handed, but the fact that both of yours are r.h thread at least one is correct iyswim. I know the fronts on mine were handed. It could be they just haven't done them up to the correct torque

[Simon says]

They have not been tightened correctly stop letting clowns near your car Daz present company accepted

[SILICONE KID]

They have been Torqued up now and sorted but i still have the loud cracks underneath...How long do these poly bushes last near the exhaust maifolds ?It seems to be coming from that area..Pushing the suspension up and down seems to be fine its just when im on the move when turning on a slight incline..

[SILICONE KID]

Advice would be appreciated !