V8 N62 Valve stem oil seals

[Cheburator mk2]

Theophany said:

I think my wallet just collapsed into itself, creating a miniature black hole in my pocket.

I have a 4.8iS X5 with 77k miles. So far, so good... But I would not dream of rebuilding the engine - car's value at best is £8.5k The sad reality of consumer economy and throw-away culture

[parabolica]

Cheburator mk2 said:

Theophany said:

I'd be interested to know what Technosport quote you as I'm just round the corner from them and need the job doing. Rather than muck about with the AGA tool, seems prudent to do the job the old fashioned way and have gaskets and piston rings done at the same time for peace of mind.

But that means engine out... If you are going to split the rods, you want to change bearings too. You may as well change the chain guides etc. Btw, if the heads are off, you want to change the guides, not just the seals... You will not get much change from 5 to 6k

This is basically what my garage quoted me for; break the engine break the bank basically. Will feedback on the quote from Technosport but won't be for a while as I'm travelling the next few weeks.

[Theophany]

Just phoned Technosport, very knowledgeable guys with a very good reputation from everything I've read. They said typically they'd replace the seals, stems, recut the seats and sort the valleys - basically a full top end rebuild. Not holding them to the price as it's not a quote, just a ball park idea, but they said you'd be looking at around £3,000 all in.

Tbh, it's more than some people claim to have paid (some claiming around £1,500 - £2,000 at garages in the North of England), but Technosport are a class act if their customer base are anything to go by.

I guess Munich Legends may be another indie to consider, but from what I've read they're barely cheaper than BMW themselves, who quoted a ball park of £5k.

[eliot]

My 750 (2005/e65) is only worth around £5-6k, so spending £2k+ doesn't make financial sense. I really should stop being lazy and just get the Aga tool, as I have a heated garage and I can live with the car being off the road as long as I need. Just don't fancy the back-ache of leaning over it for hours on end.

[8009434jr]

I would highly recommend the AGA tool. Imported one to do my 650i valve seals. The job took a couple of weekends to complete, as its a fairly involved job. The fact that you don't have to remove the engine/heads and re-time the engine is a big bonus. Its a bit awkward replacing the rear seals, but not impossible.

The tool itself is very easy to use. Recommend some long bent nose pliers to remove the valve seals, some of them were a right pain to remove. I also replaced the coolant transfer pipe at the same time, which was on its way out. I would suggest removing the inlet manifold even if you are not replacing the coolant transfer pipe just for ease of access.

Purchasing and importing the tool cost me around £800 in total. Doing the job myself obviously saved a big wad of cash and once I have sold my tool, the job only really cost me the valve seals and beer, lots and lots of beer.

[smashie]

What I thought was valve stem oil seals on my 550 turned out to be a score in the bore of cylinder no.5, so I have had a new block put it. It ended up working out the same as getting the existing block re-.

[eliot]

8009434jr said:

once I have sold my tool, the job only really cost me the valve seals and beer, lots and lots of beer.

PM sent

[Searider]

Is there a pattern as to what mileages these seals typically need doing?

eliot has said his 750 has 115k miles.

[eliot]

Searider said:

Is there a pattern as to what mileages these seals typically need doing?

eliot has said his 750 has 115k miles.

I think around the 100k mark. Mine has got worse in the last 7k miles.

I've bought the aga tool from the James who posted above, so I'll be doing this work myself shortly.

[eliot]

Well I'm now the proud owner of the AGA tool and have ordered the replacement seals, so I'll be keeping you updated with progress on this job.

Edited by eliot on Monday 2nd May 22:26

[eliot]

Update for those who are interested - I've completed 3 out of 4 cylinders on the offside bank using the tool. I purchased a USB endoscope camera for the rear bank which i couldn't even see.



For anyone thinking of tackling the job - I'm photo-documenting the process here:
http://www.mez.co.uk/page128.html

[parabolica]

Thanks for this; still considering what to do with mine as its not too bad yet.

[eliot]

Final Update - car back on the road and now SMOKE FREE!!! The work took about 4-5 days, spread over a few weeks as I had several busy weekends with other commitments. The nearside (cylinders 5-8) were far easier to do as the access is better. I replaced the offside upper timing cover seal, vanos soleniod and vacuum pump o-rings which are common problems too.

The tool is available for rent or sale if anyone needs it.

[Theophany]

Excellent work! Glad you're all sorted, just wish I had a garage to have a go on mine!

[Phil_clements]

Hi everyone... just to let you know if your having this problem with your BMW... blowing blue smoke out the exhaust after a period of idling and you want to change the valve seals, I rent the all German auto n62 valve seal replacement tool kit https://www.facebook.com/bmwn62valvesealreplacemen...

[eliot]

Phil_clements said:

Hi everyone... just to let you know if your having this problem with your BMW... blowing blue smoke out the exhaust after a period of idling and you want to change the valve seals, I rent the all German auto n62 valve seal replacement tool kit https://www.facebook.com/bmwn62valvesealreplacemen...

Your post will get pulled due to advertising rules. If you contact me via my profile, i'll add you to my web page where people can contact you without breaking any rules.

[foxybmw]

Hi there guys just wondered if anyone still had the aga tool and was looking to sell as I need to do my smokey 650..?
Thanks

[eliot]

foxybmw said:

Hi there guys just wondered if anyone still had the aga tool and was looking to sell as I need to do my smokey 650..?
Thanks

Facebook link above still works - just rent the tool. Strip the car down ready on both sides ahead of renting the tool.
(not associated to the above link - but he does link back to my instructions)

[ATM]

I've read that BMW updated these to a later type which last longer. Does anyone know when they changed?

[eliot]

ATM said:

I've read that BMW updated these to a later type which last longer. Does anyone know when they changed?

Indeed it would be nice to know - as i would actively avoid cars made in the "bad" years if I ever buy another. Mine was 2005 - so at least cars up to that point.