Under car Cross bracing removal

rm197 · 6th February 2018, 12:40

Had a bit of exhaust knock which was found to be caused by the exhaust hitting the cross bracing under the car. Fitted a rubber bush on one of the bracings which has solved the problem but I get some vibration into the cabin now.

Would I be able to remove this cross brace, just the front one for example without causing any problems?

suzublu · 6th February 2018, 12:50

I would fix the exhaust first

The hangers may have perished & need replacing

rm197 · 6th February 2018, 12:53

its a stainless, so bore is bit bigger than standard. All rubbers replaced just before christmas

suzublu · 6th February 2018, 13:05

Quote:

Originally Posted by rm197

its a stainless, so bore is bit bigger than standard. All rubbers replaced just before christmas

Just take the brace off then

Doesn't really do anything I don't think

rm197 · 6th February 2018, 13:09

thanks, will take it off tonight then. Just thought I would check! Don't think the V8's use them anyway? Should improve vibrations then

chris75 · 6th February 2018, 13:43

I have read somewhere that these cross braces are important , as part of the stiffening that the "transmission " tunnel provides

. The tunnel was never designed for transmission but was an integral part of the body shell stiffness and the braces contribute to that . I will see if I can find the reference .
I would not remove it . Try repositioning the exhaust , usually by slackening the clamp to the back-box and rotating the box a little .

chris75 · 6th February 2018, 14:01

Here is one source :
https://www.aronline.co.uk/cars/rove...pment-history/

"The requirement for body stiffness would be the reason for the large transmission tunnel and structural cross-member under the bonnet. Many members of the motoring press concluded the ‘transmission tunnel’ belied the fact that the R40’s floorpan was an adapted version of BMW’s 5-Series."

Not the one I'm thinking of , though...............

Interesting read , anyway !

Arctic · 6th February 2018, 14:02

Quote:

Originally Posted by rm197

thanks, will take it off tonight then. Just thought I would check! Don't think the V8's use them anyway? Should improve vibrations then

Hi Rhys.
I would flip it over first and refit you should get the required space then

without removal of an important brace which as above states acts as a stiffener

rm197 · 6th February 2018, 14:21

Good idea about flipping and thanks for the link, will flip it over and remove the rubber see if thats any better. Will let you know how I get on

rrobson · 6th February 2018, 15:46

Otherwise you could space it off?? You'd have to be careful of speed humps and the likes though...

6th February 2018, 12:40	#1
rm197 Regular poster MG ZT-T+ Join Date: Jun 2017 Location: Nuneaton Posts: 39 Thanks: 1 Thanked 5 Times in 4 Posts	Under car Cross bracing removal Had a bit of exhaust knock which was found to be caused by the exhaust hitting the cross bracing under the car. Fitted a rubber bush on one of the bracings which has solved the problem but I get some vibration into the cabin now. Would I be able to remove this cross brace, just the front one for example without causing any problems?

6th February 2018, 13:43	#6
chris75 same car since 2005 2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006 Location: Ellesmere Port , Cheshire Posts: 3,818 Thanks: 379 Thanked 549 Times in 466 Posts	I have read somewhere that these cross braces are important , as part of the stiffening that the "transmission " tunnel provides . The tunnel was never designed for transmission but was an integral part of the body shell stiffness and the braces contribute to that . I will see if I can find the reference . I would not remove it . Try repositioning the exhaust , usually by slackening the clamp to the back-box and rotating the box a little . __________________ Who said it was simples ?

6th February 2018, 14:01	#7
chris75 same car since 2005 2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006 Location: Ellesmere Port , Cheshire Posts: 3,818 Thanks: 379 Thanked 549 Times in 466 Posts	Here is one source : https://www.aronline.co.uk/cars/rove...pment-history/ "The requirement for body stiffness would be the reason for the large transmission tunnel and structural cross-member under the bonnet. Many members of the motoring press concluded the ‘transmission tunnel’ belied the fact that the R40’s floorpan was an adapted version of BMW’s 5-Series." Not the one I'm thinking of , though............... Interesting read , anyway ! __________________ Who said it was simples ?

6th February 2018, 15:46	#10
rrobson I really should get out more....... 75 tourer cdti, MG ZS 180, nissan terrano & 1.8t rover 25 Join Date: Feb 2010 Location: Pontefract Posts: 2,648 Thanks: 17 Thanked 295 Times in 218 Posts	Otherwise you could space it off?? You'd have to be careful of speed humps and the likes though... __________________ How to view a car - everything you need to help you inspect a used car VIS motor tester avalible to local members Injector removal tool and auto gearbox pressure tester now available

6th February 2018, 12:50	#2
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,973 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	I would fix the exhaust first The hangers may have perished & need replacing

6th February 2018, 12:53	#3
rm197 Regular poster MG ZT-T+ Join Date: Jun 2017 Location: Nuneaton Posts: 39 Thanks: 1 Thanked 5 Times in 4 Posts	its a stainless, so bore is bit bigger than standard. All rubbers replaced just before christmas

6th February 2018, 13:09	#5
rm197 Regular poster MG ZT-T+ Join Date: Jun 2017 Location: Nuneaton Posts: 39 Thanks: 1 Thanked 5 Times in 4 Posts	thanks, will take it off tonight then. Just thought I would check! Don't think the V8's use them anyway? Should improve vibrations then

6th February 2018, 14:21	#9
rm197 Regular poster MG ZT-T+ Join Date: Jun 2017 Location: Nuneaton Posts: 39 Thanks: 1 Thanked 5 Times in 4 Posts	Good idea about flipping and thanks for the link, will flip it over and remove the rubber see if thats any better. Will let you know how I get on