rattle at 2500 rpm

boater · 4th July 2012, 13:54

Hi

My 1.8 has a metalic rattle at precisely 2500 rpm and can be heard when accelerating or decelerating. It sounds like it could be an exhaust part or something similar but there are no obvious signs of any loose bits that could cause it.

Anyone had anything similar?

I have changed the bottom engine mount rubber to the powerflex type.

RugbyRover · 4th July 2012, 13:56

That happened to me the other week....... no sign of anything loose. But the Cat Coverter had gone.....

mh007 · 4th July 2012, 14:00

At a first guess I would say heat shield, cat breaking up (there are two - one in the manifold & one under floor) exhaust baffle.

I would also have a close listen to the front of the engine. Could possibly be around the timing belt area.

boater · 4th July 2012, 14:02

Interesting - I thought it could be exhaust related but how did you find it was the CAT or did you just decide to change it anyway?

Dave Goody · 4th July 2012, 15:30

I'll second the cat, I had exactly the same

4th July 2012, 13:54	#1
boater Avid contributor Rover 75 Saloon Join Date: Feb 2012 Location: Rotherham Posts: 232 Thanks: 107 Thanked 73 Times in 46 Posts	rattle at 2500 rpm Hi My 1.8 has a metalic rattle at precisely 2500 rpm and can be heard when accelerating or decelerating. It sounds like it could be an exhaust part or something similar but there are no obvious signs of any loose bits that could cause it. Anyone had anything similar? I have changed the bottom engine mount rubber to the powerflex type.

4th July 2012, 15:30	#5
Dave Goody This is my second home 15 years of 75s & ZTs now an XTrail Join Date: Nov 2006 Location: Danbury, Essex Posts: 3,761 Thanks: 18 Thanked 88 Times in 56 Posts	I'll second the cat, I had exactly the same __________________ ZT 190 X Power Grey The Only Colour is this Dark Silver!! When I was a kid I was scared of earwigs because I thought they actually lived in your ears. I was even more terrified of cockroaches!

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4th July 2012, 13:56	#2
RugbyRover Posted a thing or two Rover 75 Tourer Join Date: Sep 2010 Location: Rugby, Warwickshire (Home of Rugby Football) Posts: 1,309 Thanks: 355 Thanked 97 Times in 72 Posts	That happened to me the other week....... no sign of anything loose. But the Cat Coverter had gone.....

4th July 2012, 14:00	#3
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	At a first guess I would say heat shield, cat breaking up (there are two - one in the manifold & one under floor) exhaust baffle. I would also have a close listen to the front of the engine. Could possibly be around the timing belt area.

4th July 2012, 14:02	#4
boater Avid contributor Rover 75 Saloon Join Date: Feb 2012 Location: Rotherham Posts: 232 Thanks: 107 Thanked 73 Times in 46 Posts	Interesting - I thought it could be exhaust related but how did you find it was the CAT or did you just decide to change it anyway?