Is it the vanos?
- Thread starter Ppsvogue
- Start date
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Vanos rattle is normally likened to marbles in a tin for the first few seconds until oil pressure has been created.
Basically there are some crummy seals which fail with age and allow the oil pressure to leak of so when the engine stars there is no lubrication around the Vanos gears. Not always terminal and they can sound awful for ages before any real problems occur.
Beisan Systems - Procedures - M62TU Vanos Procedure
Mr Vanos - Bmw Vanos Repair Specialists - Home
Are a couple of sites I've looked at in the past, although knocking will not be caused by Vanos issues.
Basically there are some crummy seals which fail with age and allow the oil pressure to leak of so when the engine stars there is no lubrication around the Vanos gears. Not always terminal and they can sound awful for ages before any real problems occur.
Beisan Systems - Procedures - M62TU Vanos Procedure
Mr Vanos - Bmw Vanos Repair Specialists - Home
Are a couple of sites I've looked at in the past, although knocking will not be caused by Vanos issues.
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Until you realise how complex the timing system and VANOS system is on the M62 and then you understand that ain't to bad!!
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- 16,475
Oh no....
The tooling to lock the cams in place, hold the flywheel, tension the main timing chain, lock the VANOS drive chain tensioners in place and to re-time the VANOS gears can be up to £400 alone!
It's quite involved!!
I would explore the solenoid seal replacement if you can get the bits as it can often solve the rattle. It's an easy job apparently.
BMW V8 M62TU M62 VANOS seals repair / upgrade kit - Range Rover, Land Rover v8 | eBay
BMW V8 M62TU M62 VANOS seals repair / upgrade kit - Range Rover, Land Rover v8 | eBay
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Replacing the seals is fairly straight forward, just don't kink the seal as it has to be folded to get it in....locking the system down and getting the VANOS unit off is the fun part!!
I did have some links to the VANOS re-seal process somewhere...
Following advice on this forum, I changed the (garage supplied) oil for the correctly specified Unipart grade also fitting a Land Rover filter.
The start up rattle, which had been particularly noticeable after a few hours parked, vanished and the engine has been quiet on start up ever since.
The start up rattle, which had been particularly noticeable after a few hours parked, vanished and the engine has been quiet on start up ever since.
Last edited:
Herald
Member
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I like Brownchurch in Leyton. No nonsense and more reasonable than a main dealer. Sounds not to bad to strip down the block.
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Thanks Saint.V8
Herald everyone I know uses them or LLR in charlton.
Had a bit more of an investigation with this. Got someone to start it while I stuck my head under the bonnet. I can definitely say it is not the tappets. The sound comes from the top, front right of the engine and sounds more like a chain slap. After the initial noise there is a faint knocking/tapping from the same area.
Sound familiar to anyone?
Cheers
Herald everyone I know uses them or LLR in charlton.
Had a bit more of an investigation with this. Got someone to start it while I stuck my head under the bonnet. I can definitely say it is not the tappets. The sound comes from the top, front right of the engine and sounds more like a chain slap. After the initial noise there is a faint knocking/tapping from the same area.
Sound familiar to anyone?
Cheers
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Either VANOS or the Timing Chain Tensioner...
This is a small hydraulic piston that pumps up under oil pressure....they can get gunked up and not apply full tension to the chain causing them to slap!
This is a small hydraulic piston that pumps up under oil pressure....they can get gunked up and not apply full tension to the chain causing them to slap!
