Rpm on idle

cash1982 · 16th April 2008, 03:56

Hi. I've read some posts about idle speed but they are all about diesel. My 2.5 v6 petrol auto has 600 rpm when warm and around 1000 when cold. When warm i can feel vibrations on driovers seat and floor. I think 600rpm is too low. Can it be adiusted somehow or something may be wrong with the engine. Car runs fine when i'm driving.
any ideas?

GERFIX · 16th April 2008, 05:55

According to the owner's handbook, idle should be 750 +/- 50 rpm for the V6. So it does sound like your's is a bit low, hence the vibrations felt.

HTH

cash1982 · 16th April 2008, 06:09

yes i though so. can it be adjusted somehow?

stocktake · 16th April 2008, 06:56

Regardless of what "Mr Haynes" or owners handbook says I think all V6's are around the 600 RPM mark on tickover.

Mine is, other people I have spoken to, theres are, and the number you see for sale with a picture of the dash at tickover showing around 600rpm.

Check for engine mount wear or exhaust catching bodywork.

I believe tickover can be adjusted via T4 but you would have to check.

I stand to be corrected on this but I can only speak as I find

tony_fry · 16th April 2008, 11:13

There is a posting on the forum about the T4 by Keith and the adjustment is only done on the T4 (as far as I know)

Below is a link to Keith's T4 Screen Dumps It does mention the tick over on one of the pictures, you will have to go through it to find it!!

http://www.the75andztclub.co.uk/foru...ick#post114290

tony_fry · 16th April 2008, 11:16

Just found it, it's the 26th posting on

http://www.the75andztclub.co.uk/foru...ick#post114290

stocktake · 16th April 2008, 13:38

Didn't realise it but Keiths post relates to the four cylinder Diesel, not the KV6, As noted by OP. Don't know if that makes a difference?

cash1982 · 16th April 2008, 17:54

Quote:

Originally Posted by stocktake

Didn't realise it but Keiths post relates to the four cylinder Diesel, not the KV6, As noted by OP. Don't know if that makes a difference?

Thanks for reply. Seems like it should be like that 600rpm. Never had rover before. My last car Lexus ls400 4.0 v8 had 500rpm but no vibrations, smooth as silk. This engine must be different. 62k on clock is it possible that engine mounts need to be replaced?

stocktake · 16th April 2008, 17:58

Your welcome to have a look under my bonnet for any differences we can see, mines a 99 2.5 auto. I'm in Leeds and fairly quiet tomorrow. Let me know where you are via PM and put the kettle on.

we could make sure your plenums are clear at the same time.

Phil · 16th April 2008, 20:25

Check the rear lower engine stabliser mount for wear, other than that, my 1.8T idles at an INDICATED 600rpm and that shudders a little bit.

16th April 2008, 03:56	#1
cash1982 Regular poster Rover 75 classic 2.5 v6 saloon '99 pewter grey Join Date: Apr 2008 Location: Halifax Posts: 35 Thanks: 0 Thanked 0 Times in 0 Posts	Rpm on idle Hi. I've read some posts about idle speed but they are all about diesel. My 2.5 v6 petrol auto has 600 rpm when warm and around 1000 when cold. When warm i can feel vibrations on driovers seat and floor. I think 600rpm is too low. Can it be adiusted somehow or something may be wrong with the engine. Car runs fine when i'm driving. any ideas?

16th April 2008, 05:55	#2
GERFIX I really should get out more....... MINI COOPER S Join Date: Nov 2007 Location: Tranent, East Lothian, SCOTLAND Posts: 2,834 Thanks: 0 Thanked 0 Times in 0 Posts	According to the owner's handbook, idle should be 750 +/- 50 rpm for the V6. So it does sound like your's is a bit low, hence the vibrations felt. HTH __________________ .......................................Colin http://i245.photobucket.com/albums/g...Cooper-S-2.jpg

16th April 2008, 06:56	#4
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,593 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	Regardless of what "Mr Haynes" or owners handbook says I think all V6's are around the 600 RPM mark on tickover. Mine is, other people I have spoken to, theres are, and the number you see for sale with a picture of the dash at tickover showing around 600rpm. Check for engine mount wear or exhaust catching bodywork. I believe tickover can be adjusted via T4 but you would have to check. I stand to be corrected on this but I can only speak as I find __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident

16th April 2008, 13:38	#7
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,593 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	Didn't realise it but Keiths post relates to the four cylinder Diesel, not the KV6, As noted by OP. Don't know if that makes a difference? __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident

16th April 2008, 17:58	#9
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,593 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	Your welcome to have a look under my bonnet for any differences we can see, mines a 99 2.5 auto. I'm in Leeds and fairly quiet tomorrow. Let me know where you are via PM and put the kettle on. we could make sure your plenums are clear at the same time. __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident

16th April 2008, 06:09	#3
cash1982 Regular poster Rover 75 classic 2.5 v6 saloon '99 pewter grey Join Date: Apr 2008 Location: Halifax Posts: 35 Thanks: 0 Thanked 0 Times in 0 Posts	yes i though so. can it be adjusted somehow?

16th April 2008, 11:13	#5
tony_fry I really should get out more....... BMW I3 Join Date: Nov 2006 Location: South East London Posts: 2,224 Thanks: 31 Thanked 77 Times in 61 Posts	There is a posting on the forum about the T4 by Keith and the adjustment is only done on the T4 (as far as I know) Below is a link to Keith's T4 Screen Dumps It does mention the tick over on one of the pictures, you will have to go through it to find it!! http://www.the75andztclub.co.uk/foru...ick#post114290

16th April 2008, 11:16	#6
tony_fry I really should get out more....... BMW I3 Join Date: Nov 2006 Location: South East London Posts: 2,224 Thanks: 31 Thanked 77 Times in 61 Posts	Just found it, it's the 26th posting on http://www.the75andztclub.co.uk/foru...ick#post114290

16th April 2008, 20:25	#10
Phil This is my second home Rover 75 CDT Connoisseur SE Join Date: Nov 2006 Location: Wales Posts: 12,227 Thanks: 469 Thanked 523 Times in 241 Posts	Check the rear lower engine stabliser mount for wear, other than that, my 1.8T idles at an INDICATED 600rpm and that shudders a little bit. __________________