Knocking noise in sump area

[philip1]

Recently went over a sleeping policeman which seem to be down every f***ing road in my area. I now have a very loud knocking noise coming from the sump area of my TVR S2 every time I start the car.Please Can anybody tell me what this might be, as the car was running perfectly before the run in with the sleeping policeman.

regards Philip

[PetrolTed]

Probably the exhaust banging on the sump. Be careful of which way the U clips on your exhaust are facing or it could puncture the sump.

[JSG]

Phil,

Is it just when you start the car, or while you are driving / cornering as well.

The exhaust sounds likely, but I would check engine and gearbox mounts as well in case they've been disturbed. I had a similar noise years ago caused by a knackered mount.

Cheers,
JSG.

[PeterC]

Sounds very similar to mine - the exhaust was removed and remounted by me to allow access to gearbox. The exhaust now runs too close to the chassis cross rail immediately behind the sump and I get an occasional knocking noise when cold, which disappears once the exhaust warms up a bit.

Solution - undo the exhaust mounts under the middle of the car and tweak them (bend them a bit) and then refit the system.