Thought I would post up one here, as I ahven't for a while.
But basically, it goes, i'm doing an M30b35 build, so thought I would share it,as it will be the same for the E21 later.
Head off, rocker shafts removed, rockers and cam out too.
Head now booked in for Monday for a pressure test and a 1/2mm skim
I'll take out the valves on Monday for those eagled eye fookers!
Pistons look to be OK, and the bores look good too, can still see the honing marks on them.
Looks to have been running rick though.
Going "Supercharged" on this engine, so the 1/2mm skim was put on hild for a clean face instead.
Going for a Rotrex C30 range.
Gave the head in on Monday for a pressure test and skim.
Pressure test was good, and a skim of 4 thou wasa only needed.
Picked it up this morning, removed the valves, and the guides and gave it a quick clean.
Lovely brand new Light billet flywheel, takes the E34 clutch. winkeye
Looked into the bottom end shells and big end bearings
Not good, slighty worn and will need to be replaced, so ordered they were.
Cleaned up the face with wet'n'dry and taped up.
Removed the shells and crank and pistons
And left it at that.
Tomorrow, it's clean up time, and painting the block.
Adaptors for the ITB's
Anyway, can't try them, as i've sent the head away for the valves and valve seats to have 3 angles put on to them, couldn't resist it as I had a very good price quoted to have it done.
Had the block honed today too, needed doing as there was slight scoring on a few of the bores.
Had a load of parts Soda and media blasted to get rid of all the oil and wax on the parts.
The ITB's were like this
To this
Also, had some head work done in the last few weeks too, thought it would be nice to treat it to a better flow
Had the seats and vlaves cut to 3 angled finishes.
Next new seats, cutter pilot installed.
The first cut at 60* is the bottom cut.
Followed by a 30* top cut, then the seat cut, both are on a double sided cutter. The seat cut is at 46* the two faces will bed in together within the first moments of the engine being started.
This is what you end up with after it has been soda blasted, and all the cuts finished.
A before and after, not alot of difference really as the head had already been scrubbed, but the soda gives it a nice uniform look and doesn't damage the surface of the alloy.
Firstly, all new chain guides fitted yesterday,
New thrust bearing and shells fitted, dropped the crank in and tightened up the bolts.
For some reason, there was quite alot of end float which was a bit baffling, as everything was measured by using a micrometer
.
So off came the crank again, the old thrust bearing installed, and then everything reinstalled again, this was to check the origional end float on the crank, cam to 0.005th
So, vice versa, new one installed, and for some reason, don't ask, there was reduced crank end float to about 0.002th, so checked and rechecked, phoned a few guys on the Zone to make sure and all is now ok.
Thought i'd strip/paint and rebuild the ITB's ready for when they're needed.
And a few more,
That'll be it till next week when I get the head back.
Then i'll try the Stainless Steel 6 branch and see what needs to be done to make it fit.
And this is where it satnds atm.
Hopefully more later on this month.
no worries. I have to respect you for sticking with your m30's mate. 
