Hairy exhaust!!

mileshawk56 · 17th April 2021, 18:33

The MGZT KV6 produced what looked like hanks of fine grey hair from the exhaust after along run. Yards of it! Presume its fibre glass type material? Apart from it indicating maybe the exhaust needs renewing can anyone suggest which part of the system it might be from- back, middle whatever.? Thanks for your time. Chris .S.

TourerSteve · 17th April 2021, 19:04

Quote:

Originally Posted by mileshawk56

The MGZT KV6 produced what looked like hanks of fine grey hair from the exhaust after along run. Yards of it! Presume its fibre glass type material? Apart from it indicating maybe the exhaust needs renewing can anyone suggest which part of the system it might be from- back, middle whatever.? Thanks for your time. Chris .S.

https://www.youtube.com/watch?v=fgHeFmZqxFM

Need I say any more

Could be any of the boxes but the back box is the closest

Ducati750cc · 17th April 2021, 21:28

As Tourer says the favourite is the back box due to the internal corrosion of the baffles that retain the sound deadening material.

Don't put up with it for too long because what can happen is that it partially blocks the internal part of the tail pipe, increases back pressure then you won't be going anywhere fast or at all.

A clue if you think that this has happened is, whilst stationary, rev the engine at fairly high revs until you note a difference in performance, kill the engine and you will hear a steady hiss as the pressure escapes.

A get you home dodge, tools permitting, is to chop a hole in the back wall of the box, about half the wall, rake out the axminster, then off you go, it will be a bit noisier and there may well be a noticeable increase in performance due to the blockage causing a gradual fall off over weeks or days.

Excess back pressure, when it occurs, for various reasons, causes much head scratching.

madeupname · 17th April 2021, 21:42

Have to agree. I had the same thing happen with my 406. I rang a garage and they said the packing was coming out of the back box. New one fitted that same day. No more grey hair

Until now, but I am getting on a bit

mh007 · 18th April 2021, 10:17

I've seen quite a few produce hair extensions out of the rear tailpipe, including one of my own

roverbarmy · 18th April 2021, 13:30

My rear silencer box started spewing horse hair after an mot. Maybe the probe disturbed it when rust had destroyed the inner housing.

Sent from my SM-G903F using Tapatalk

17th April 2021, 18:33	#1
mileshawk56 Posted a thing or two MGZT Join Date: Jul 2015 Location: Berkshire Posts: 1,281 Thanks: 1,738 Thanked 299 Times in 216 Posts	Hairy exhaust!! The MGZT KV6 produced what looked like hanks of fine grey hair from the exhaust after along run. Yards of it! Presume its fibre glass type material? Apart from it indicating maybe the exhaust needs renewing can anyone suggest which part of the system it might be from- back, middle whatever.? Thanks for your time. Chris .S.

17th April 2021, 21:28	#3
Ducati750cc Loves to post Rover75 tourer Join Date: Jun 2018 Location: Ashton Posts: 428 Thanks: 121 Thanked 206 Times in 145 Posts	As Tourer says the favourite is the back box due to the internal corrosion of the baffles that retain the sound deadening material. Don't put up with it for too long because what can happen is that it partially blocks the internal part of the tail pipe, increases back pressure then you won't be going anywhere fast or at all. A clue if you think that this has happened is, whilst stationary, rev the engine at fairly high revs until you note a difference in performance, kill the engine and you will hear a steady hiss as the pressure escapes. A get you home dodge, tools permitting, is to chop a hole in the back wall of the box, about half the wall, rake out the axminster, then off you go, it will be a bit noisier and there may well be a noticeable increase in performance due to the blockage causing a gradual fall off over weeks or days. Excess back pressure, when it occurs, for various reasons, causes much head scratching. __________________ Common sense isn't a gift, it's a punishment because you have to deal with everyone who doesn't have it.

17th April 2021, 21:42	#4
madeupname Posted a thing or two Rover 75 Connie Mk2 1.8 (Mo) Join Date: Feb 2017 Location: Sheffield Posts: 1,531 Thanks: 875 Thanked 335 Times in 289 Posts	Have to agree. I had the same thing happen with my 406. I rang a garage and they said the packing was coming out of the back box. New one fitted that same day. No more grey hair Until now, but I am getting on a bit __________________ Mo was born Tuesday, 22nd June 2004 @ 08:32:41 This vehicle was the 99,307th 75 to run off the production line, out of 112,381 This vehicle was the 5,377th 75 1.8 Connoisseur to be made out of 6,033 This vehicle was the 783rd 75 in Firefrost Red (code: CEV) to be made out of 2,089 Firefrost Red 75s

18th April 2021, 13:30	#6
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,050 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	My rear silencer box started spewing horse hair after an mot. Maybe the probe disturbed it when rust had destroyed the inner housing. Sent from my SM-G903F using Tapatalk __________________ Oil in my veins!

18th April 2021, 10:17	#5
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	I've seen quite a few produce hair extensions out of the rear tailpipe, including one of my own