Rear Silencer knocking against heat shield = problem solved

[panadero]

I have just replaced my rear silencer on a 2004 HDI 110 estate. The new silencer mated with the exhaust pipe no probs and I secured the
clamp over the joint OK. Also the supporting prongs on the new box mated with those in the superstructure of the car. However I found that the prongs
on the new box were somewhat thinner than on the original box so I had to improvise by making sleeves for the two hanger rubber grommets to eliminate excess play.

All in all the relacement seems fine - except that the box is closer to the heat shield than the original and knocks against it annoyingly. There seems to be no scope for adjustment to lower the box away from the heat shield so I am thinking of pushing some kind of heat resistant material between the box and the heat shield to act as a buffer. Or maybe different grommets with a longer drop?

Has anyone come against this problem and can they offer a solution please?

[PeterN]

If the exhaust is in two sections, rotating the rear section slightly may help. but it needs clamping really tight or it will twist again. If its a solid system you may be able to bend it slightly by jacking it up, with a block of soft wood between the jack and pipe.

Peter

[panadero]

My exhaust system is in 3 parts and the rear box and tail pipe fit very tightly into the space available
(near the rear bumper section). Although I did not fully understand your post you got me thinking about the
pipe in the mid section because if that were lowered then the rear box would automatically be lowered as well.
So many thanks.

[PeterN]

The problem I have had in the past is that the system can rotate at the joins as there is usually more weight on one side, if you slacken the clamps you may be able to rotate the offending section to give greater clearance. I have just re read you post and see its only the rear section you have replaced, it can be that this holds the rest of the system in the correct place and when you remove it the rest moves out of position, if you slacken the clamp you may be able to rotate the join to move the whole system.

I have had this problem several times with Citroen XMs and have had jack the centre section up while tightening the clamp to hold it in position.

Peter

[binnzy]

If none of the above work take the exhaust down put a length of tube on the prongs bend them up a bit and refit

[panadero]

Thanks to Peter and Binnzy - I'll let you know how I get on. Thats the joy of car mechanics - there's always a way around
any problem. Well up to now that is!

[panadero]

Postscript
The problem was caused by the use of the original 2 Peugeot grommets which pulled the new back box too close to the heat shield. I obtained alternative grommets on ebay - basically longer being greater distance between the holes. This cured the problem although these grommets have 12mm
holes which is fine for the prong on the box but slightly too big for the prong on the car so had to wind duct tape around latter prong to eliminate slack.
Less slack means greater stability for the box. This solution may well only apply to my particular replacement box under the trade name KLARIUS. I guess that when manufacturers make replacement parts like this there is always the risk that the dimensions of the replacement part may be a few mm out from oem.