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Old 19th June 2018, 10:33 PM   #21
Chady
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Originally Posted by E46CoupeM3 View Post
If you turn the head on its side in two blocks of softwood and fill the ports with petrol no leak around the valve head means no lapping cutting or anything required

If it seeps over long time probably doesn't need anything / seals under pressure or at worst a lapping
Did exactly this myself surprised how much valves were letting buy, just required lapping

Last edited by Chady; 19th June 2018 at 10:38 PM.
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Old 19th June 2018, 10:45 PM   #22
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as said I think this head gasket is the same as oem, I’ve had a new bmw And elring together, to me they look identical, the other bits also look good.
From memory bmw do a full gasket set ,, but doesn’t include the head gasket, so gets expensive,
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Old 19th July 2018, 01:55 PM   #23
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How’s this coming on? I’m about to embark on the same journey myself
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Old 19th July 2018, 02:29 PM   #24
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How’s this coming on? I’m about to embark on the same journey myself
Yes, progress is being made. I'll follow up with some pictures in the next few minutes.

The problem is that the car is at my parents, and by the time I've gotten there, unpacked the tools etc, I don't have much time before I have to pack up again and drive back to Northampton to collect the missus from the train station.
So weekday progress is slow going, weekends are better, but also taken up by pre-arranged events etc...

Also had about a week's delay in getting the head back from the machinist...
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Old 19th July 2018, 03:07 PM   #25
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So I decided to go ahead with the full works on the head, this added an extra bit of time to the machining shop’s schedule and left me time for parts to be delivered etc.

I also decided to replace the CPV seal while waiting (and with the exhaust manifolds removed, it was far easier to get access).

I didn’t have a drag-link socket though, and didn’t want to buy a big flathead socket just to butcher it, so found the closest most ghetto fitting tool I could find…






Picked the clean and shiny head up, complete with 3x bent valves (souvenirs?) and set about winding in some new exhaust manifold studs (a few of the crusty old ones came out as I was unscrewing the manifold nuts)…





After that it was time to clean up the block and refit the cylinder head…

Cheers, Dave
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Old 19th July 2018, 03:30 PM   #26
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So I decided to go ahead with the full works on the head, this added an extra bit of time to the machining shop’s schedule and left me time for parts to be delivered etc.

I also decided to replace the CPV seal while waiting (and with the exhaust manifolds removed, it was far easier to get access).

I didn’t have a drag-link socket though, and didn’t want to buy a big flathead socket just to butcher it, so found the closest most ghetto fitting tool I could find…






Picked the clean and shiny head up, complete with 3x bent valves (souvenirs?) and set about winding in some new exhaust manifold studs (a few of the crusty old ones came out as I was unscrewing the manifold nuts)…





After that it was time to clean up the block and refit the cylinder head…

Cheers, Dave
Excellent work, love the use of the coin haha
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Old 24th July 2018, 03:40 PM   #27
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What guide are you following?

Or have you done this before?
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Old 25th July 2018, 09:14 PM   #28
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Nice work
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Old 26th July 2018, 03:35 PM   #29
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What guide are you following?

Or have you done this before?
No, never done anything like this before

There is no one guide that I'm following - a healthy mix of everything...

Previous threads on here and other forums,
Beisan guides are very thorough but only get you so far,
BMW TIS documents are all available online,
m3support.net is a handy tool
various youtube videos (50skid does a lot of m54 engine strip down stuf which helps)

It's basically a lot of reading, finding something you don't understand and then research that particular bit

I have about 30-40 tabs open on my browser to cover it, and as I complete a 'next step' I close those tabs down and I can track my progress.

It demystifies the whole engine (a little bit anyway) - just taking too damn long
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Old 26th July 2018, 03:59 PM   #30
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I’ve cleaned up the block with a few bits of grit paper and wd40, cleaned out the cylinders and fitted the gasket (Genuine BMW = £144).




Gingerly placed the head on, feeding the timing chain through and washed the new bolts in a light film of oil, ready to be torqued down…




I also used a torque angle gauge (but didn’t grab a picture) to help with the TTY specs of the headbolts. It was a tense job.

Fiddly job of refitting the exhaust manifolds (actually much less fiddly than removing them in the first place) I’ve kept the heat shield off for now in case there is an exhaust blow upon starting her back up…

Spent some time cleaning up the throttle bodies and refitted, along with fuel rail, and the aluminium water pipe. All with new seals/gaskets…




And re-installed the cams (with plenty of assembly lube)



I’ve re-measured the valve clearances, and the re-work of the cylinder head has tightened up a lot of the gaps up – but the new valves that have been installed are WAY out – so I’m waiting for the replacement shims I need to arrive…


In the meantime, I have begun to replace the seals/gaskets in the VANOS unit with the Beisan systems replacements…








And that’s where I am at the moment, another potentially productive weekend taken up by some bollox social activity, so will be back working on the car next week.

Aim to get intake manifold and airbox refitted during the week and hopefully VANOS bolted back on the following weekend…

Cheers,
Dave
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Old 26th July 2018, 04:14 PM   #31
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Keep up the gud work. Something to watch out for , make sure the small chain tensioning guide, that the tensioner spring assembly pushes on,is on the correct top side of the lower guide or you will find you can’t get the chain on the sprockets..

Last edited by Chady; 26th July 2018 at 04:16 PM.
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Old 26th July 2018, 08:06 PM   #32
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good work
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Old 8th August 2018, 04:26 PM   #33
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Well, not as much progress achieved as hoped for…

Replacement shims arrived to bring the new valves back into spec.

Now, I hadn’t purchased the tool as I had previously taken the shims out after removing the cams and had planned to pop new ones in just before replacing them. The head work and new valves meant I had to re-measure the clearances (with the cams back in) and so now I was in need of the tool.

But I’m too tight to buy one, and didn’t want to wait for delivery anyway so…

I had a little magnet hanging around (only 2mm thick) and seemed the right size and shape.



Stuck it to the topside of my feeler gauge (which were already handily bent to a helpful angle) and voila…!






Low profile (low cost) shim tool!

So, shims replaced and all in spec, started to replace the intake manifold too as I had a bit of spare time.
Hoping this weekend to make much more progress.

Cheers,
Dave
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Old 9th August 2018, 12:41 PM   #34
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Nice one. Its rewarding doing it yourself and I think you do a better job because its your own car and your not rushing to have it done within a certain time frame.

Definitely made the right choice regarding the valve stem seals etc. Only thing I would say regards to the clearances and shims is measure at least 2/3 times and make sure you're happy.
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Old 10th August 2018, 10:33 PM   #35
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Nice one. Its rewarding doing it yourself and I think you do a better job because its your own car and your not rushing to have it done within a certain time frame.

Definitely made the right choice regarding the valve stem seals etc. Only thing I would say regards to the clearances and shims is measure at least 2/3 times and make sure you're happy.
Cheers mate. You are certainly forced to take care and focus on what you are doing. But it's all achievable isn't it, and can be done to a high standard.

Yes, I spent ages checking and re-checking the bloody things. My back still aches from it.
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Old 10th August 2018, 10:36 PM   #36
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So hoping to crack on this weekend…

Made a start tonight by re-installing the thrust washers and centering sleeves onto the cam shafts. For this I used new replacement bolts from BMW (although the old ones hadn’t unwound or backed out)…



Looking at the wear on the lower chain guide, I think I caught it just in time…





You can see sunlight coming through the material at the edges…




Replaced it with another BMW item – so it will eventually wear again over the coming years – probably should have gone for the uprated unit from Hack, it probably just seemed too pricey at the time.

Have reassembled the sprockets and chain (just final torques to nip up to on a few bolts) and called it a day outside…



Spent the rest of the evening completing the Beisan seals/gaskets on the Vanos unit and assembled it together (pump disc etc) ready for installing back onto the car.



Cheers,
Dave
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Old 11th August 2018, 07:20 AM   #37
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Regarding that upper tension guide,, you’ll also get wear on top part of the mateing face of the lower guide but not as severe,,,, I’ve also noticed the oil pump guide get pitted as it wears, worth checking if your taking the timing chain cover off, ..feel you’re back pain
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