My engine go rattle

Pooky · 19-03-2012, 11:26 AM

So after a short run at on Saturday start the car this morning and it just rattles immediately. Related to engine revs does it from idle. Open bonnet rattle seems top end near the front. Drives fine though, power OK no misfire or anything.

So Vanos?

Time to flex the warranty.

azrael · 19-03-2012, 12:30 PM

Could be cam followers, mine was similar

giraffe · 20-03-2012, 01:41 AM

could be a number of things would need to see the car in the flesh to locate

The Gorilla · 20-03-2012, 09:52 AM

Hi,

From what you describe it sounds like
it could be a Vanos issue.

Regards,

The Gorilla.

Pooky · 20-03-2012, 09:59 AM

Been out with the dealer technician, agree it's got a problem. The shout of cam follower seems sensible as it has that tappety quality of a badly adjusted old A-Series Mini, and seems to be coming from the middle of the cam cover.

Trawler · 20-03-2012, 10:38 AM

Had a similar problem on a previous M3. Thought the worst but it turned out to be a faulty connection on a sensor, located using the diagnostic system.

DuncanR · 20-03-2012, 07:04 PM

Break out the Green Bananas again !

Pooky · 22-03-2012, 08:04 PM

So one of the cam followers on the intake has worn to a 3 ridge shape, rather than smooth curve, which is all rather strange. And technician said that all the valve clearences needed doing, and some by quite a margin. Strange again suggesting maybe clearences not done despite full dealer history...

giraffe · 22-03-2012, 11:07 PM

Quote:

Originally Posted by Pooky

So one of the cam followers on the intake has worn to a 3 ridge shape, rather than smooth curve, which is all rather strange. And technician said that all the valve clearences needed doing, and some by quite a margin. Strange again suggesting maybe clearences not done despite full dealer history...

If some of the followers have worn like that it would suggest it suffered oil starvation to top end and has probably worn few of the other followers also even tho they may appear ok on visual inspection , this could be cause of incorrect valve clearances .

Pooky · 26-03-2012, 10:31 AM

3 cam followers being replaced under warranty.

Impossible to prove but looking at the wear patterns it looks like incorrect clearances to me (I've been to look at the car with the technicians) especially as the cam is untouched for wear or grooving, measures the same etc., Also, the cam followers are not grouped together and the amount of wear on each differs, one is very bad. Doesn't seem to be any reason why it might have had oil starvation at the top of the engine plus the wear is very polished suggesting it's been happening over a period. Basically they are all carrying three flats on the follower rather than a smooth curve. All the other followers are fine.

19-03-2012, 11:26 AM	#1
Pooky S4 - Getting the hang of it Join Date: Jan 2012 Posts: 187 Casino cash: $11992	My engine go rattle So after a short run at on Saturday start the car this morning and it just rattles immediately. Related to engine revs does it from idle. Open bonnet rattle seems top end near the front. Drives fine though, power OK no misfire or anything. So Vanos? Time to flex the warranty. Last edited by Pooky; 14-05-2012 at 06:00 PM.

19-03-2012, 12:30 PM	#2
azrael S5, Sport On, DSC M-track Join Date: Sep 2007 Location: Portsmouth/Reading Posts: 1,292 Casino cash: $9290	Could be cam followers, mine was similar __________________ Ashley Shaeffer BMW - Wooo

20-03-2012, 01:41 AM	#3
giraffe S5 - Full Throttle Join Date: Aug 2011 Location: cambs Posts: 285 Casino cash: $3859	could be a number of things would need to see the car in the flesh to locate __________________ Keep on rolling

20-03-2012, 07:04 PM	#7
DuncanR CSL Register Uber-poster! Join Date: Sep 2009 Location: Olney, Bucks Posts: 3,735 Casino cash: $9984	Break out the Green Bananas again ! __________________ " I use Gleaming Kleen.... for that new car look " I wish I had used - Race Data Systems - Motorsport Data Loggers forgive me Nathan !

20-03-2012, 09:52 AM	#4
The Gorilla S5, Sport Off, DSC M-track Join Date: Apr 2008 Posts: 740 Casino cash: $14401	Hi, From what you describe it sounds like it could be a Vanos issue. Regards, The Gorilla.

20-03-2012, 09:59 AM	#5
Pooky S4 - Getting the hang of it Join Date: Jan 2012 Posts: 187 Casino cash: $11992	Been out with the dealer technician, agree it's got a problem. The shout of cam follower seems sensible as it has that tappety quality of a badly adjusted old A-Series Mini, and seems to be coming from the middle of the cam cover.

20-03-2012, 10:38 AM	#6
Trawler Driving it like I nicked it Join Date: Dec 2008 Posts: 2,213 Casino cash: $25916	Had a similar problem on a previous M3. Thought the worst but it turned out to be a faulty connection on a sensor, located using the diagnostic system.

22-03-2012, 08:04 PM	#8
Pooky S4 - Getting the hang of it Join Date: Jan 2012 Posts: 187 Casino cash: $11992	So one of the cam followers on the intake has worn to a 3 ridge shape, rather than smooth curve, which is all rather strange. And technician said that all the valve clearences needed doing, and some by quite a margin. Strange again suggesting maybe clearences not done despite full dealer history...

26-03-2012, 10:31 AM	#10
Pooky S4 - Getting the hang of it Join Date: Jan 2012 Posts: 187 Casino cash: $11992	3 cam followers being replaced under warranty. Impossible to prove but looking at the wear patterns it looks like incorrect clearances to me (I've been to look at the car with the technicians) especially as the cam is untouched for wear or grooving, measures the same etc., Also, the cam followers are not grouped together and the amount of wear on each differs, one is very bad. Doesn't seem to be any reason why it might have had oil starvation at the top of the engine plus the wear is very polished suggesting it's been happening over a period. Basically they are all carrying three flats on the follower rather than a smooth curve. All the other followers are fine.