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ALPINA5

N62 Valve seals

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Hi

I have got blue smoke from one of my tail pipes, checked ccv's they are all fine, have put it down to valve seals.

I have seen a special tool to change the valve seals with the head in situ.

Can anyone recommend a specialist who can help me sort my problem out?

Thanks in advance

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If you have the tool, can you not do it yourself?  Is that the tool that puts compressed air into the head to keep the valve shut?

 

Mine were beginning to go, not enough to fail emissions on MOT but there was certainly a smell and slight colour to my exhaust. It was on my to do list but the gearbox gave out before the valve stems did.  Seams quite common on the N62 I'm afraid.

 

it will be a big job to do as there are so many other things that would need doing while you are in there with the top of each head off, upper timing chain cover gaskets, vanos seals, vacuum pump o ring....

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I've had the smells and plumes of blue a few times, replaced the orange CCV valves and it all ran clear for 7 months(they were not torn)

 

2 weeks ago, took them out, cleaned and refitted = all good no smoke again

 

mine seem to choke up a little with condensation and a tiny bit mayo and the smoke starts again, guess they stick open and allow vapour into intake

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Are the CCV valves at the rear of the block/head?

 

I looked into it on my E60 but couldn't convince myself that I had found the right bit when it fired off a code for secondary air system fault. 

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On 23/09/2016 at 7:53 AM, 535iAR said:

Are the CCV valves at the rear of the block/head?

 

I looked into it on my E60 but couldn't convince myself that I had found the right bit when it fired off a code for secondary air system fault. 

 

CCV valves at front of each bank, on top of rocker cover

 

im not convinced it's the valve stem oil seals yet, maybe I'm trying to convince myself it's not them due to labour involved

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Right ta, in that case that's what I had replaced at 5.5 years old. EML came on and it sounded like it was running on 6.75 cylinders. BMW took a bit of head scratching to find the fault as all the fault code pointed to was running lean. £200 bill but the bits were only just over £20 for the pair.

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