Too many silencers?

[IanMc]

How many silencers should my Cavalier Coupe automatic have?

While crawling around underneath, I noticed that mine had three...

One is adjacent to the gearbox, the next one is central (the normal position), then the ‘cherry bomb’ at the end/back.

Could this be creating too much back pressure, stopping my car from starting - see my project thread.

Perhaps one or more of these has collapsed internally?

Thoughts and comments welcomed.

[mantasrme]

3 is the right amount on a standard Manta exhaust, i presume the cav coupe would be the same but i have never had one with a standard exhaust on.

The first flat one by the gearbox is a resonator more than a true silencer.

[IanMc]

Nice one, thanks chaps.

[plumster]

Only ever had two on the Sportshatch.

[cam.in.head]

1.6 models dont have a box on the front section whereas 2litre ones do.all interchangeable if req but better to fit the 2 litre version to all as the 1.6 type makes the exhaust slightly noisier.rest of system is saloon,coupe/ hatch specific.(technically the same but different bends)

[IanMc]

Thanks CIH, more very useful information!

[IanMc]

Thoughts please guys.

If I replace my triple silencer system with the more 'common' dual silencer system (middle and end), am I going to experience any difficulties in the fitting or function?

Thanks in advance.

[Julian]

I removed the front flat resonator on my Cavvy about ten years ago, so only have the two silencers now, and she sounds really nice.and sporty.

Edited February 2, 2018 by Julian

[cam.in.head]

hi ian.fitting and function will be the same albeit slightly noisier.to be honest finding a 1.6 front pipe will be harder than a 2.0 one anyway. vl239 is the number. depending on what you can find and if youre handy with the grinder and welder it shouldnt be too difficult.saloons and coupes are similar but if you end up with hatchback middle and rear be prepared for some cutting and re joining.! all part of the fun mate !

[IanMc]

Thanks lads, as always your input is greatly appreciated.

I plan on taking a good look at the complete system this weekend to find out just how much of it is scrap. I suspect all of it, so at least I will now have a few options.

Thanks again.

[®evo03]

How cool is this!

U might like this better!

 

 

 

[IanMc]

3 hours ago, ®evo03 said:

How cool is this!

U might like this better!

 

 

 

Yes, that is very cool.

Many thanks for posting that.

Would you mind disclosing where you found that diagram, if it’s from a company offering the exhaust I have it would be useful to have their details.

[®evo03]

Not a company, maybe opel part numbers, its from a russan manta site, they are a very resourceful lot, and are good at making things, just not exhaust apparently.

Here is another one, stainless this time,

Maybe take em to an exhaust centre, try ur luck

3A5FD3CC-9E2B-4B4B-B448-09EEB7EC7697.png~original

[IanMc]

Thanks for that, much appreciated 

[KAA]

Numbers in the drawing are the old Bosal aftermarket part numbers. May be able to use them for cross-reference or find some old-stock Bosal or Walker exhaust boxes.

[®evo03]

Had another drawing, its not showing so here are the numbers, 

System ref 38078

Top gasket gmg7

XVL239P front pipe with front box

XVL228G middle box and up and over

XVL229E back box and tail pipe.

 

 

[®evo03]

Hope this works!

Yee ha!

 

[IanMc]

Thanks to you both - much appreciated!