Exhaust centre box -EXPLODED !

What caused this ? - accelerated hard and then...BANG... SMOKE/DUST trail.. stopped and had a look to find that the Centre exhaust box had exploded..ripped-open along seam turfing out the sound- deadening material which wrapped itself around prop etc. I now have a Lovely v8 burble but that not impressing the neighbours ! ( the box which cost me £100 is only 18 months old with 3000 miles on it )

V8HSE said:

What caused this ? - accelerated hard and then...BANG... SMOKE/DUST trail.. stopped and had a look to find that the Centre exhaust box had exploded..ripped-open along seam turfing out the sound- deadening material which wrapped itself around prop etc. I now have a Lovely v8 burble but that not impressing the neighbours ! ( the box which cost me £100 is only 18 months old with 3000 miles on it )

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Take it back to where you bought it from and give them hell,
The least they can do is fit you another one at cost! If out of warranty

sounds like the wadding was of inferior quality or too much of it causing back pressure. the only way out was along the weakest point. had this a few times on Merc vans. found that the internals were not as they should be.

I am sure most exhaust units come eith a 3 year guarantee....

This is usually caused by unburned fuel making its way into the exhaust system - you've probably got a long-standing misfire.

You sure it's not been backfiring? It might just all of a sudden get louder where it ripped open but with a bang sounds like a backfire .

Thats Bollocks said:

Take it back to where you bought it from and give them hell,
The least they can do is fit you another one at cost! If out of warranty

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sas1810 said:

sounds like the wadding was of inferior quality or too much of it causing back pressure. the only way out was along the weakest point. had this a few times on Merc vans. found that the internals were not as they should be.

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StuckAgainSteve said:

This is usually caused by unburned fuel making its way into the exhaust system - you've probably got a long-standing misfire.

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Correct SAS, nothing to do with the exhaust being of poor or faulty quality, an explosion took place within the exhaust.

Soloby Rob said:

Correct SAS, nothing to do with the exhaust being of poor or faulty quality, an explosion took place within the exhaust.

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Totally off topic....how do you quote multiple posts in a reply????

Saint.V8 said:

Totally off topic....how do you quote multiple posts in a reply????

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Took me ages to get it but here goes, next to the quote box there's a multi quote, you click on the multi quote for each post you want to quote and on the last one you click on quote. Bit like this;

Multi quote
Multi quote
Quote with your reply.

Quote one cut and paste go to next one?

its the button with "+ on it

Soloby Rob said:

Correct SAS, nothing to do with the exhaust being of poor or faulty quality, an explosion took place within the exhaust.

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yes, but we had this happen on diesels as well as petrol vans.

There was no -misfiring.. I had driven about 5 miles before this happened. Rangey still drives perfectly -though sounds like one of those American V8 THUNDERSALOON racing cars I'm thinking must have been an internal breakdown causing a blockage in the box resulting in pressure to build-up until it popped the seam under hard acceleration. Rangey is fitted with stainless double tail pipe. Could the cats have broken up and lodged in the centre box causing the blockage ?

sas1810 said:

yes, but we had this happen on diesels as well as petrol vans.

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Stuff a potato in your diesel exhaust and if no leaks it will die through lack of breathing so if wadding was blocking you would have noticed most exhausts have a slight leak at joints and water holes to expele a boil'd up or water put your hand over the end and I bet your have a slight leak.

sas1810 said:

its the button with "+ on it

Click to expand...

defender300td1 said:

Quote one cut and paste go to next one?

Click to expand...

Soloby Rob said:

Took me ages to get it but here goes, next to the quote box there's a multi quote, you click on the multi quote for each post you want to quote and on the last one you click on quote. Bit like this;

Multi quote
Multi quote
Quote with your reply.

Click to expand...

Ok...thanks guys, think I got it now...

Back to topic now!!

If you cant let fumes gases out then after time you can't let fuel air in !

V8HSE said:

What caused this ? - accelerated hard and then...BANG... SMOKE/DUST trail.. stopped and had a look to find that the Centre exhaust box had exploded..ripped-open along seam turfing out the sound- deadening material which wrapped itself around prop etc. I now have a Lovely v8 burble but that not impressing the neighbours ! ( the box which cost me £100 is only 18 months old with 3000 miles on it )

Click to expand...

Even if the wadding caused huge back pressure it would have blown through it. Probably unburnt fuel/(LPG) igniting with the heat, what you describe was quite lucky as it/you may have come off a lot worse.

Stainless systems usually have a life time guarantee bar the tail pipe and rubbers and clamps.

I suggest running on a ramp without the box and see just how much fuel leaks out the headers. If you can do one bank at a time.

does sound like unburnt fuel..

tried to get mi dads volve started with easy start, got too much in and when it fired centre box exploded...

Yes been there also
Rear silencer blocked fell apart inside causing fuel vapour to buid up in centre silencer
put foot down and bang if I can get my photos of my phone and onto Landyzone you would see it opened up like a jam tin, p38 gems are almost back fire proof so check rear
silencer and replace both.

If they wont replace the centre box for you free of charge after you have checked for other issues cut the box off leaving as much pipe as possible and weld a strait pipe in its place, good V8 sound but not too loud as to upset the neighbours .