Noisy heatshield

Rp61973 · 22nd September 2014, 18:12

When I replaced my undertray fixings at the weekend, I noted that the heatshield that sits above the CAT had come loose - three of the four boltholes seem to have enlarged so that the shield simply dropped past the washer onto the CAT. There was the occasional knocking noise when driving over speedhumps etc.

Luckily I found a set of repair, penny washers and used these on the bolts to anchor the shield back to the underside of the tub. Trouble is the ******* thing is now more noisier than before. It rattles and vibrates with the engine revs. Is it a case that the shield may be touching the CAT or is the shield supposed to have some rubber bushing to prevent the "zizz" noise?

Many thanks

Paul

chris75 · 22nd September 2014, 18:55

No rubber - it tends to melt

It could indeed be touching the cat , or anything else that moves nearby . Have a look and bend it as necessary . Or , maybe it's not fully tightened up and buzzing on its fasteners

Rp61973 · 6th October 2014, 12:06

Hmm, it isn't the heatshield at fault; it is the exhaust. The lovely 'Bosal' box has decided to part company from the central pipe, right on the joint. Rotten as a pear. Sounds like a proper farm vehicle now!

Must have been some excess movement in the assemble due to the rotten joint, causing the central pipe to knock against the heatshield.

22nd September 2014, 18:12	#1
Rp61973 Loves to post Rover 75 CDTI Classic Join Date: Jul 2014 Location: Galleywood Posts: 374 Thanks: 80 Thanked 67 Times in 45 Posts	Noisy heatshield When I replaced my undertray fixings at the weekend, I noted that the heatshield that sits above the CAT had come loose - three of the four boltholes seem to have enlarged so that the shield simply dropped past the washer onto the CAT. There was the occasional knocking noise when driving over speedhumps etc. Luckily I found a set of repair, penny washers and used these on the bolts to anchor the shield back to the underside of the tub. Trouble is the ******* thing is now more noisier than before. It rattles and vibrates with the engine revs. Is it a case that the shield may be touching the CAT or is the shield supposed to have some rubber bushing to prevent the "zizz" noise? Many thanks Paul __________________ 2006 Rover 75 CDTI in Starlight Silver 1973 Rover P6 3500 in Monza Red

22nd September 2014, 18:55	#2
chris75 same car since 2005 2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006 Location: Ellesmere Port , Cheshire Posts: 3,811 Thanks: 379 Thanked 549 Times in 466 Posts	No rubber - it tends to melt It could indeed be touching the cat , or anything else that moves nearby . Have a look and bend it as necessary . Or , maybe it's not fully tightened up and buzzing on its fasteners __________________ Who said it was simples ?

6th October 2014, 12:06	#3
Rp61973 Loves to post Rover 75 CDTI Classic Join Date: Jul 2014 Location: Galleywood Posts: 374 Thanks: 80 Thanked 67 Times in 45 Posts	Hmm, it isn't the heatshield at fault; it is the exhaust. The lovely 'Bosal' box has decided to part company from the central pipe, right on the joint. Rotten as a pear. Sounds like a proper farm vehicle now! Must have been some excess movement in the assemble due to the rotten joint, causing the central pipe to knock against the heatshield. __________________ 2006 Rover 75 CDTI in Starlight Silver 1973 Rover P6 3500 in Monza Red