Noisy Vanos Unit on M50...

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   Hey guys, another mind numbing post from me as usual...
I've had the engine replaced, it all went in ok...ish! (apart from costing me about a billion pounds) But now we have another issue. A noisy vanos! Seems to be coming from the uppermost part of the timing chain case (right by the vanos) and is a kind of rattle!
Can anyone help with this?
Could it possibly be the tensioner? Worn chain guides?
Is there a quick fix?
This is doing my head in aaarrrggghhh!!!
Thanks in advance
Keith

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Blackcat Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 09-January-2004 Location: United Kingdom Status: Offline Points: 168	Post Options Post Reply Quote Blackcat Report Post Thanks(0) Quote Reply Topic: Noisy Vanos Unit on M50... Posted: 07-November-2006 at 21:16
	Hey guys, another mind numbing post from me as usual... I've had the engine replaced, it all went in ok...ish! (apart from costing me about a billion pounds) But now we have another issue. A noisy vanos! Seems to be coming from the uppermost part of the timing chain case (right by the vanos) and is a kind of rattle! Can anyone help with this? Could it possibly be the tensioner? Worn chain guides? Is there a quick fix? This is doing my head in aaarrrggghhh!!! Thanks in advance Keith
	Burning rubber??? I prefer to think of it as scorching tarmac!!!

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Madrab Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 21-November-2003 Location: Scotland Status: Offline Points: 569	Post Options Post Reply Quote Madrab Report Post Thanks(0) Quote Reply Posted: 09-November-2006 at 13:10
	Warranty if it's a new one Blackcat? You really don't want to go there if considering fixing the VANOS. It's an easy concept made dificult by the fact that it's half hydraulic. Is it single or dual? probably single as it was the M52 that they introduced the dual version I think. It's understanding what side the rattle's on. In a single VANOS the exhaust cam is hard connected to the crank via a chain and then there's a chain that connets the exhaust sproket to the inlet VANOS system. If the rattle is at the inlet side then it will be the chain that connets the two banks that is rattling. This may be down to tensioners/guides or spring plate. Suggest referring to the Bentley manual if you have one, or follow the link here for some info that hopefully may help http://www.bentleypublishers.com/features/b398/b398_updates1 .htm Cheers Rob
	1990 E3o 325i Touring and she's definately a she! Pain in the ass sometimes but goes like a bunny :oD

beemerfool Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 02-April-2006 Location: rep.of Irl(cork) Status: Offline Points: 213	Post Options Post Reply Quote beemerfool Report Post Thanks(0) Quote Reply Posted: 10-November-2006 at 21:14
	rob, followed link- still as ignorant!!! could it be the vanos system in my car making a hissing noise? you can hear it especially when switching off the engine. should i be worried about it??
	gas brake honk. gas brake honk. honk honk punch. gas gas gas ��'92 E36 325i saloon

Blackcat Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member II Joined: 09-January-2004 Location: United Kingdom Status: Offline Points: 168	Post Options Post Reply Quote Blackcat Report Post Thanks(0) Quote Reply Posted: 10-November-2006 at 21:27
	Doesn't make a hissing, more of a rattling or heavy tapping, and is at the front of the engine by the viscous fan blades. It should be coming from the bit that BMW spray paint a kind of goldy colour and always ends up flacking off and looking rubbish!
	Burning rubber??? I prefer to think of it as scorching tarmac!!!

Madrab Members Profile Send Private Message Find Members Posts Add to Buddy List Really Senior Member II Joined: 21-November-2003 Location: Scotland Status: Offline Points: 569	Post Options Post Reply Quote Madrab Report Post Thanks(0) Quote Reply Posted: 13-November-2006 at 12:57
	Your's sounds like it may be the tensioner Blackcat as it sounds like it is a third of the way down, where the tensioner is located as per the diagram in the link, would you think that 's where the noise is coming from? Might be worth taking the top plate off and check for slack , worn chain? BF, i wouldn't think the hissing is from the VANOS as the hydraulics are controlled by oil pressure controlled by the DME and not air that would hiss so you would see oil if there was a leak. Not sure what the hissing could be then, do you have AC? Rob
	1990 E3o 325i Touring and she's definately a she! Pain in the ass sometimes but goes like a bunny :oD

sidyal Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 18-February-2004 Location: United Kingdom Status: Offline Points: 55	Post Options Post Reply Quote sidyal Report Post Thanks(0) Quote Reply Posted: 23-November-2006 at 16:29
	When I had the e34 touring I had a noisy vanos. My indy fixed it for around �100-�120 I think. It only affected the early M50 vanos engines as they were modified during production to combat this. I think a plate, bolts and poss springs (I can't remember exactly) were replaced. It ran sweet after that. Ask a BMW indy as it seemed to me to be a common problem the way he talked about it(Ex BMW mechanic).
	E39 525TDS Touring Auto Individual. Style 32s, Schnitzer Side Skirts, Front Aero Spoiler, Chipped. All The Car I Need. :)