Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 1st July 2013, 22:46   #1
Bolin
This is my second home
 
Bolin's Avatar
 
Rover 75 2.5 V6 Connoisseur SE 4dr manual Wedgewood Blue 2 04-05/06/2001

Join Date: Nov 2006
Location: N.E. Hampshire
Posts: 4,617
Thanks: 289
Thanked 308 Times in 243 Posts
Unhappy KV6 bad engine noise & vibration - looks like I may need to take my car to a garage

My KV6 is making a bad noise from th area of the engine, plus has a slight vibration.

The noise can be herad from inside the car and is most noticeable if you stick your head underneath the front bumper, infront of the driver's wheel with the undertray removed. It sounds like it's coming from the bottom of engine, but due to acoustics this may not be the case.

There is a slight vibration at idle, which can be felt in the floor and in the steering wheel. If you rev the car up, when the revs drop back to idle speed the vbration will get noticeably worse for a brief moment before settling back to how it was before.

I'll try to post a video tomorrow.

I thought it could be the DMF, and considering some other symptoms I had and reading lots on here, it all fitted that it was on the way out. However, it was within spec but the surface was knacked and the clutch slave cylinbder was wonky and sort-of half broken (surpised the clutch didn't feel worse). So these have been replaced but the original noise and vibration remain the same.

The cambelt tensioner pulley and idler pulley were both replaced when the belts were done by Andy Willi in April 2011, car has only done 8,500 miles since. However, my noise does sound vaguely similar to that which is apparently due to a failing tensioner pulley.

Could it perhaps be the tensioner itself causing the problem? If not, any ideas what is?

With a vague 'noise and vibration' problem like this, I am at the limit of my experience and so may need to take my car to a garage to get this diagnosed.

Any help in diagnosing this problem myself would be greatly appreciated.

Thanks, Bolin
Bolin is offline   Reply With Quote
Old 1st July 2013, 23:10   #2
Greeners
Moderator
 
Greeners's Avatar
 
MG-ZTT

Join Date: Mar 2007
Location: Ware, Herts
Posts: 19,798
Thanks: 161
Thanked 1,249 Times in 1,036 Posts
Default

Start with the lower mount

This was the one on my 190

Greeners is offline   Reply With Quote
Old 1st July 2013, 23:14   #3
Bolin
This is my second home
 
Bolin's Avatar
 
Rover 75 2.5 V6 Connoisseur SE 4dr manual Wedgewood Blue 2 04-05/06/2001

Join Date: Nov 2006
Location: N.E. Hampshire
Posts: 4,617
Thanks: 289
Thanked 308 Times in 243 Posts
Default

Thanks David, but it was done shortly after the belts

Can't be much left on my car that I haven't fixed
Bolin is offline   Reply With Quote
Old 1st July 2013, 23:17   #4
Greeners
Moderator
 
Greeners's Avatar
 
MG-ZTT

Join Date: Mar 2007
Location: Ware, Herts
Posts: 19,798
Thanks: 161
Thanked 1,249 Times in 1,036 Posts
Default

Not sure how far into Hampshire you are, but if your not a million miles away, get Corin to have a look/listen/poke
Greeners is offline   Reply With Quote
Old 2nd July 2013, 01:33   #5
Indiana_Jones
Avid contributor
 
Rover 600 SLDi

Join Date: Feb 2013
Posts: 120
Thanks: 0
Thanked 1 Time in 1 Post
Default

How does one check the lower mounts? get the car up on some ramps/axle stands?

Sorry to hijack!
Indiana_Jones is offline   Reply With Quote
Old 2nd July 2013, 01:39   #6
Greeners
Moderator
 
Greeners's Avatar
 
MG-ZTT

Join Date: Mar 2007
Location: Ware, Herts
Posts: 19,798
Thanks: 161
Thanked 1,249 Times in 1,036 Posts
Default

Quote:
Originally Posted by Indiana_Jones View Post
How does one check the lower mounts? get the car up on some ramps/axle stands?

Sorry to hijack!
yes and remove the 2 bolts and out it pops
Greeners is offline   Reply With Quote
Old 2nd July 2013, 01:59   #7
Indiana_Jones
Avid contributor
 
Rover 600 SLDi

Join Date: Feb 2013
Posts: 120
Thanks: 0
Thanked 1 Time in 1 Post
Default

Quote:
Originally Posted by Greeners View Post
yes and remove the 2 bolts and out it pops
Cheers mate _b
Indiana_Jones is offline   Reply With Quote
Old 2nd July 2013, 08:52   #8
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Colin,

What about the auxiliary drive belt, it's tensioner and idler wheels? If you begin by removing the wheelarch liner, then start the engine and have a close look at the belt tension.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 2nd July 2013, 09:07   #9
Bolin
This is my second home
 
Bolin's Avatar
 
Rover 75 2.5 V6 Connoisseur SE 4dr manual Wedgewood Blue 2 04-05/06/2001

Join Date: Nov 2006
Location: N.E. Hampshire
Posts: 4,617
Thanks: 289
Thanked 308 Times in 243 Posts
Default

Quote:
Originally Posted by Greeners View Post
Not sure how far into Hampshire you are, but if your not a million miles away, get Corin to have a look/listen/poke
I did get a PM back from me and he gave me his home phone number - I left two messages and spoke to his wife but he still hasn't got back to me, and that was a couple of weeks ago

Quote:
Originally Posted by SD1too View Post
Colin,

What about the auxiliary drive belt, it's tensioner and idler wheels? If you begin by removing the wheelarch liner, then start the engine and have a close look at the belt tension.

Simon
It's not the aux belt run Simon, sadly. I released the tensioner from the top of the engine bay using a 3/8" socket and slipped the belt off the aux idler and aircon compressor and moved the belt out of the way of the crankshaft pulley, and ran the engine - the noise remained.

In my investigations I did find that the aux idler is a bit noisy, but has no play in the bearings. However, this is not the cause of the noise that this thread is about - hence me being quite worried about it as it appears to be something more fundamental.
Bolin is offline   Reply With Quote
Old 2nd July 2013, 11:08   #10
Canonite
This is my second home
 
BMW 330d Tourer, MG ZT 180 SE XPG, VW Polo 6R 1.2 TDI Bluemotion

Join Date: Jul 2011
Location: York
Posts: 6,020
Thanks: 363
Thanked 574 Times in 319 Posts
Default

I had something similar which turned out to be cambelt tensioner which had disintegrated
Canonite is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 18:25.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd