Ppsvogue · Jan 19, 2015

Hey guys.
So been reading up on google and watching clips on YouTube and just wondering could my cold start rattling be down to the vanos? There is also a slight knocking on the right side of the engine.

Does anyone know how much it would cost to replace this?

Cheers

donp38 · Jan 19, 2015

can you give us more information regarding car, miles, service history etc??

Ppsvogue · Jan 19, 2015

Car has 150k but still as smooth as ever. Only prob with the engine is the rattle on cold start that lasts for about a second then clears. A faint knocking can be heard from the right side of the engine while running.
It's a 2004 4.4 recently serviced

donp38 · Jan 19, 2015

when was the last oil and filter change and what oil was used?

quavey · Jan 19, 2015

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.

Ppsvogue · Jan 20, 2015

That's for that. I have just spoken to Brownchurch in Leytonstone and they have quoted me £400 just to strip it down and look at it. A tad excessive if you ask me

Saint.V8 · Jan 20, 2015

Ppsvogue said:
That's for that. I have just spoken to Brownchurch in Leytonstone and they have quoted me £400 just to strip it down and look at it. A tad excessive if you ask me

Until you realise how complex the timing system and VANOS system is on the M62 and then you understand that ain't to bad!!

Ppsvogue · Jan 20, 2015

Yh I am starting to realise that now. I thought/hoped it would be an easy swap out job

Saint.V8 · Jan 20, 2015

Ppsvogue said:
Yh I am starting to realise that now. I thought/hoped it would be an easy swap out job

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!!

quavey · Jan 20, 2015

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

Saint.V8 · Jan 20, 2015

quavey said:
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

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...

Ppsvogue · Jan 20, 2015

Any links you have would be great to see

Sentinel · Jan 20, 2015

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.

Ppsvogue · Jan 20, 2015

Oh really. What grade oil did you use?

The noise I get is what I can only explain as the tappets banging without oil and this literally happens for a second then it sounds like the oil reaches them and it's quiet.

donp38 · Jan 21, 2015

I had the very faintest of rumble with mine on start up.
oil and filter change done and all well.

Mobil 1 +LR filter.

Herald · Jan 21, 2015

I like Brownchurch in Leyton. No nonsense and more reasonable than a main dealer. Sounds not to bad to strip down the block.

Saint.V8 · Jan 21, 2015

Vanos re-seal guide....

Beisan Systems - Procedures - M62TU Vanos Procedure

Ppsvogue · Jan 22, 2015

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

Saint.V8 · Jan 22, 2015

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!

Ppsvogue · Jan 22, 2015

Thought that might be the issue. Am guessing they are both as awkward and expensive as each other lol

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