[carhead]

HI

firstly accept my apologies if this is not the correct area to post this.

I used to own a Rover 420 GSI Turbo K Plate with a factory fitted exhaust (did try a stainless one from JP Exhausts, Macclesfield), but I found it made a horrible resonating noise at 3000rpm which happens to be motorway speed. So back to standard.

I now own a Rover 220 GSI Turbo N Plate with only 23k. Sounds absolutely awful, as soon as the turbo kicks in, it becomes noisy, almost like an air leak in the exhaust system or the turbo area, but I have noticed a difference between the two cars. The 420 middle box is different to the 220, 220 looks smaller and a different shape cherry bomb also car sounds different on idle more of a sports exhaust sort of sound , the 420 sounded like any other car

i have taken the car into a performance specialist in Stockport, they could not find any air leaks, just that it sounded like it was coming from the middle box.

really does ruin the car compared to the 420 sounded great

would like a stainless steel exhaust but i have been told it will even more noisy ,!


The question is, is it normal fitment on the 220 cherry tree type shape exhaust ?? did it change as my old car was a 1993 new 1995 ?? cannot believe that it is meant to sound this way people turn round on hard acceleration not even a nice load sound ???


HELP Please

[RoverRevival]

as per my other post, come pay the holy one a visit, if i can't answer the question should should never have asked it

[carhead]

i will

[E_T_V]

Manifold leak perhaps? That is pretty common.

[RoverRevival]

Any further update on this?

[220 GSi turbo]

I had manifold gasket failure on both my 420 turbo and the 220.

Lucky escape with the 420 at the time, as it was the end right next to the cambelt cover and the cover had started to melt

The 220 also started leaking on the manifold to turbo joint and I seem to remember I had to have the manifold joint face skimmed slightly before it went back together.

[RoverRevival]

ouch (looking for some hot stuff.....)

lucky catch, its a good job rover owners are always under the bonnet regularly, don't know why, they never go wrong really.

[E_T_V]

If it is the gasket there are two usual causes.

1. The wrong gasket is used. The cheapy ones often listed for the NASP which don't have eyeletted holes quickly blow. By quick I mean I had one last only a week. The proper one is expensive (for a gasket), but it is well worth it as it isn't a job you want to have to do regularly

2. The manifold to cylinder head bolts strip the thread in the cylinder head meaning they don't tighten properly (causing the gasket to blow). A helicoil is the usual fix but fitting it can be a pain. (all mine are now helicoiled!)