bad knocking noise. any ideas

[danfrith]

Hi Guys,
I am getting a very bad mechanical knocking noise, when turning left and also when im going over 60mph.

Its been checked over but the TVR garage are starting to scratch their heads. Its not prop shaft, gearbox, engine or drive shafts?

Anyone had a similar problem?

doesnt do it whilst ticking over, its only when the car is moving.

cheers

Dan

[Julian64]

ohhh finally a proper problem rather than handbag throwing.

What is the knocking noise in time with.
Does it go when you touch the brake
Does it go when you take the car out of gear

[jeremyc]

Exhaust knocking against the chassis?

I had this and it only manifested itself when turning sharp left (or going around roundabouts in France ).

Might be worth trying to realign/tighten the exhaust mounts.

[Extra 300 Driver]

Do you still have cats? It could be those knocking on the chassis.

Also does it knock when you coast? If it does then its rear of the gearbox.

[kojak]

exhaust mounts
PAS fluid level
worn CV joints
engine oil...yes, engine oil.(although this can be more of a moaning noise)

>> Edited by kojak on Tuesday 20th September 15:59

>> Edited by kojak on Tuesday 20th September 16:00

[Extra 300 Driver]

oh engine oil, yeah thats true.

I think it cold be the diff, seeing as it does it when turning.

[budaholic]

I had this too... every time I turned left. Mine turned out to be the exhaust manifold rubbing on the chassis.
Andy at APM shifted the engine over a fraction and its now cured.

[TooTall Paul]

Are you sure he didn't move the Chassis

[danfrith]

thanks guys, all exhaust and cat theorys have been looked through! plenty of engine oil.

scratching my head now as everything everyone has kindly mentioned has been explored! oh dear!

thanks again

[Cyclone1]

Could be the exhaust expanding when hot and catching on the rear heat shield?

[danfrith]

Hi Guys, thanks for your help, car is now sorted, turned out to be exactly the problem budaholic had re: below

***
budaholic

I had this too... every time I turned left. Mine turned out to be the exhaust manifold rubbing on the chassis.
Andy at APM shifted the engine over a fraction and its now cured.
***

cheers

Dan