How to fix 1.8turbo Catalyst Rattle?

T-Cut · 20th September 2007, 14:42

Almost overnight my 2004 Connoisseur (16,000 miles) has changed from a silent running dream to a rattling embarassment. It sounds like the dreaded catalyst rattle to me. I haven't been under to investigate, but from the driving seat with the door open, the rattle emanates from the right place. Could be loose baffles in the front box I guess, but isn't catalyst rattle more likely?
I've seen the diagram (where?) for welding the detached V6 cat, but is there a similar fix for the 1.8turbo?

TC

sworks · 20th September 2007, 18:22

check the exhaust mount that bolts to the sump as these are prone for braking

T-Cut · 20th September 2007, 21:32

I'd best check properly before seeking more advice.
Cheers.

TC

crofts · 22nd September 2007, 00:50

Think I have heard of folks inserting a self tapping screw to stop this. Maybe positioning is important but can't see it can do much harm.
Am sure a member will come along and confirm this remedy.

T-Cut · 22nd September 2007, 09:22

I've read that too, as well as the hole & weld method. Problem is, how many screws might you have to fit before getting it right? You really need the exact measurements/positioning, otherwise I can see the cat ruined.

TC

T-Cut · 26th September 2007, 12:59

OK have checked the rattling exhaust and it seems to be from the first silencer box after the catalyst. When I bang on this with my hand I hear 'loose' stuff rattling inside. I guess this means the baffles have detached? Has anyone managed to fix this rattle? The pipe itself is like new having covered only 16,000 miles, so I'm reluctant to have it all replaced just because of the rattle. However, it gets pretty annoying in town, once the pipework is hot. Any suggestions?

TC

T-Cut · 27th September 2007, 15:43

Bump!
Ref rattling silencer.
Has anyone actually tried self-tapping screws?
Did it worK?
TC

20th September 2007, 14:42	#1
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,751 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	How to fix 1.8turbo Catalyst Rattle? Almost overnight my 2004 Connoisseur (16,000 miles) has changed from a silent running dream to a rattling embarassment. It sounds like the dreaded catalyst rattle to me. I haven't been under to investigate, but from the driving seat with the door open, the rattle emanates from the right place. Could be loose baffles in the front box I guess, but isn't catalyst rattle more likely? I've seen the diagram (where?) for welding the detached V6 cat, but is there a similar fix for the 1.8turbo? TC

20th September 2007, 18:22	#2
sworks Been absent for a while… Rover 75 Tourer, Classic mini Cooper S, Abarth 595 competizione, MG TF and a Hyundai Tucson PHEV Join Date: Feb 2007 Location: Cumbria Posts: 13,065 Thanks: 1,033 Thanked 1,686 Times in 1,040 Posts	check the exhaust mount that bolts to the sump as these are prone for braking __________________ ................................................. 'Marmite' Possibly one of the most famous 75 tourers produced! left the production line as the last of only Three Rover 75 tourers produced in Trophy Yellow. 48 hours later Longbridge closed. The last sold ordered 75 Tourer. Paid for by the Phoenix Four and handed over by John Towers to the Warwickshire Northampton Air ambulance service as a Rapid Response vehicle

22nd September 2007, 00:50	#4
crofts I really should get out more....... 2003 Rover 75 Conn. SE Auto Tourer 131 ps CDTi Join Date: Nov 2006 Location: Bristol Posts: 2,512 Thanks: 38 Thanked 67 Times in 55 Posts	Cat rattle ! Think I have heard of folks inserting a self tapping screw to stop this. Maybe positioning is important but can't see it can do much harm. Am sure a member will come along and confirm this remedy. __________________ Rover 75 CDTi SE Connoisseur Tourer (2003) In desirable STARLIGHT SILVER (now restored to it's former glory with all the chrome !)

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20th September 2007, 21:32	#3
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,751 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	I'd best check properly before seeking more advice. Cheers. TC

22nd September 2007, 09:22	#5
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,751 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	I've read that too, as well as the hole & weld method. Problem is, how many screws might you have to fit before getting it right? You really need the exact measurements/positioning, otherwise I can see the cat ruined. TC

26th September 2007, 12:59	#6
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,751 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	OK have checked the rattling exhaust and it seems to be from the first silencer box after the catalyst. When I bang on this with my hand I hear 'loose' stuff rattling inside. I guess this means the baffles have detached? Has anyone managed to fix this rattle? The pipe itself is like new having covered only 16,000 miles, so I'm reluctant to have it all replaced just because of the rattle. However, it gets pretty annoying in town, once the pipework is hot. Any suggestions? TC

27th September 2007, 15:43	#7
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,751 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Bump! Ref rattling silencer. Has anyone actually tried self-tapping screws? Did it worK? TC