E12 tidy up.

[pandemonium001]

i think you gonna need to beef up your seat brackets, those M6 bolts will snap-off when that turboed engine launches

nice build, keep on going...

what ya trying to say?.

Engine now fully stripped and ready for cleaning, dipping and inspection.
plastigauges ordered.

have been looking for a kirkey seat for ages but not many premium ones come up for my "cough" big bones.

looks like if the pistons are 91.80mm they are the Mahle ones, so makes sense why people are getting 600hp on std bottom end.

google m30 turbo bigred.

[pandemonium001]

more piccys

Brand new turbo arrived today


stripped


first round with TFR and wire wheen on drill





future cleaning tank


tank for dipping the block


dried out the block with propane torch then started rubbing down with red scotch and little oil and hone to see where we are at.


found this


hmmm the worst corrosion


came out not to bad cannot feel it with finger nail, and barely with index finger tip



bearing seats have been oiled.

other cylinder shots




see the rust inside the water jacket



the whole block will be dipped in the Bilt hamber deox-c got another 2kg in the post,then on to clean up, rinse, dry, bore measured, honed again, then measured, think i will chance the 2 marks in the cylinder.

deck will be checked for flatness with a 12x1" slip then sanded with same slip with p320-p400
see chart for micron to Pvalue equivelent
http://www.fine-tools.com/G10019.html

[bmw e12 e21]

Wow, nice work! the engine block seems to be in good condition.

[pandemonium001]

measured the bores



haynes manual states 92.000 +/- 0.01mm
top edge of all 6 cylinders where there should be no wear ranged from 92.018mm to 92.024mm, i do believe that may be the factory size, unless previous worked honed it out a bit.
sizes as follows


sizes are in mm, the " is habit, i work in imperial. top size was 20mm or so down from top deck

found a handy BMW tis in russian
http://tis.bmwcats.com/document/technic ... 00:w13004/

Tstsilindra a) 92.00 ± 0.01 mm
Bore - an intermediate size of a) 92.08 ± 0.01 mm
1 ) Repair and size ) 92.25 ± 0.01 mm
2 ) Repair and size ) 92.50 ± 0.01 mm
Permitted roundness and cylinder ) mm 0.01
Permissible taper and cylinder ) mm 0.01
The maximum permissible total wear clearance between piston and cylinder ( engine running) 0.15 mm
a) a new or processed

Bore taper i would say cylinder 3 &4 are on the limit
I presume the intermediate size is the maximum serviceable limit before rebore, so looks good. unless we start reboring an engine due to 3.9tenths of a thou wear.

next onto block de-rusting and then main line bearing checks, need to order the ARP stud h/w soon as well.

[pandemonium001]

saw rod and joost E12 thread and realised i sold my e12 sump with the engine, crap, but then realised the e34 has the windage plates in it.

so will probably cut, winglet and baffle the E34 one to take advantage of the plates, i was looking at crank scrapers any way so this probably saved me $100




just need to see if the oil pump clears o.k as well.

[pandemonium001]

de rusted the block using bilt hamber deox-c, if you heat the solution it really works well.

poured in hot water and maintained the temp using a 1950w dishwasher immersion heater £11 from ebay


you can see how clean the water jacket is


the cossosion was so heavy it could be scrapped with a screwdriver


some flash rust after removal

block painted



top deck was given a little rub with p600 and a straight edge


end float check


not within spec, 0.19mm so 0.02mm outwith spec.
thought i might as well check one of the clearances as well



0.05mm is the upper end of the clearances, or 8 thou in old money.

I should have greased one side for a better reading but its close enough to confirm the engine is just worn to the upper limits through mileage.



ARP head studs are on the way.

Athena coopering head gasket has arrived.

Hastings Moly piston rings are on the way.

now on the search for main bearings

acl or kings bearings look good.

I think the s52b32 bearings are the same:
Material Tri-metal
Min Std Shaft Size 2.3611in / 59.971mm
Max Std Shaft Size 2.3618in / 59.990mm
Min Std Tunnel Size 2.5591in / 65.000mm
Max Std Tunnel Size 2.5598in / 65.019mm
Max Wall at Crown 0.0980in / 2.490mm 0.0930in / 2.478mm
Max Overall Length
0.787in / 20.00mm - 1538H
0.982in / 24.94mm - 1539H
Notes Set contains 6 pairs of 1538H upper/lower shells for positions 1,2,3,4,5 & 7, and one pair of 1539H upper/lower flange shells for position 6.

taken from the ACL website, so time to get the vernier out again.

[pandemonium001]

Well, bearings removed and where stamped Glyco items, dated 89, so no one has been in the bottom end.

got this stuff for gaskets


painted and installed dip stick


cleaned and degrease, new glyco std bearings arrived from germany.



though i would try some DFL therapy




look on Molykote website search for D321-r







Athena Coopering 0.078" headgasket arrived from italy as well.



started cleaning pistons in prep for thermal barrier top coat and DFL on the skirts






cleaned and keyed new filter housing lid for paint




degraesed and washer out, ready to install









just need to make a AN10 adapter for the cooler.

installed with

good for semi permenent bolts



chased out block threads

all cleaned up ready for end float check



in-out-in-out shake it all about

first install was to tight 0.002mm, back out rub on flat surface with p2000 and now sitting nice at 0.01mm.

all in for gap checks


all caps removed where even and all under the 0.05mm max indicator, so i am judging its around the 0.04mm range.



permenant locktight for the final install of the ARP main studs



use some of this


torqued to sequence....again... and looks like it did 1hr before


but with a little more ARP Torque lube on it.

ARP head studs and piston rings should be here this week.

But ARP rod bolts wont be here till 2nd of October, so can crack on with other bits first.

[uwbuurman]

Man, I envy your skills! Looks great!

[Peter V.]

That would be your next chapter Koos! Read and learn.

Nice work.

[pandemonium001]

Thanks folks, more to come soon. just waiting for parts.

[Jeroen]

Doing a brilliant job mate!!!

[pandemonium001]

Oil pump facts:
oil supply is only 50% filtered


http://www.mye28.com/viewtopic.php?p=954115

see above regarding oil deck restrictors.

Fwd supply hole supplies direct to engine, aft supply hole is straight to the filter housing via the check valve in the canister.

Put the air line on it to check.


Both head supplies where filled with heavy grease, drilled to 8.5mm and tapped m10x1.5
rotate block, fill supply line with ATF and blown through to clear any debris.

Yes I didn't know about this before I installed the crank hence the heavy grease.

drill 3mm hole and slot for install



I can see the merits of this mod, and i do like to drive engine hard, now and then.

installing aft end cap


and lubed with this


just bought all A2 stainless bolts, they arent that expensive and look good.

all internal parts get RED locktight, all external gets Blue/green locktight.



new water pump and refreshed pulley


was going to start balancing the rods


but couldnt get repetitions of weight even within 5g using method above. I though crappy ebay scales, so checked all wrist pins and full rods, each repeated within 0.1g each time, so must be my method. will need to look into it.

installed other end cap, turbo drain & chain and tensioner/guides


6mm dowel keys


drilled Crank and pulley 19mm deep





installed dowels to length




this seams to be a common mod on the PPF Forum as a must for any engine build. Normally 1 dowel is enough, but i though 3 is better.
No locktight used as i may want to remove in the future, plus all torque is radial so the B&%$£$D nut is enough to hold the non tapered shaft in place.

Another reason is the 26 year old oil pump is now NLA or silly money if available, the Gears are all sold out, so options are, run the old pump, or try my hand at Dry sump conversion.

A Weaver 4 stage pump is on its way.

3 scavange 1 supply, plan is a billet adapter to oem oil supply, that will tie in the oem filter canister and thermostat oil cooler.

[pandemonium001]

still waiting on the ARP rod bolts before i can balance properly, plus have some plans for the OEM pistons that I can be working on.

[pandemonium001]

pistons got some love,



5 thou bond layer 7 thou Yttria-stabilized zirconia

by the time i coat the valves and combustion chanber compression should be around 9.5-1

something else i have always wanted to do



weaver 4 stage

[pandemonium001]

ARP rod bolts have been despatched so eta 2-8 working days.