Worlds longest Resto, my C2 2.7 19/3/18 Vent guage action

[Demlotcrew]

[Dezzy]

I'm the dude.... Dude

[e30topless]

Nothing to worry about. Ive never had to have a steel cast crank hardened again after a regrind.
Andrew

+1,

7 years ago I did a re-build on a Merc coupe that had lovely bottom end knocking, the crank was re- ground and new oversize shells fitted, the turd is still gracing our lovely roads after 50+k and lots of abuse !

Bert, stick it in the block and crack on !

[Rodderz]

Did you source another head, or modify another?

And, plasma niteriding is the way to go!

[Simon13]

engine builders! cease................um no one oldskool has said to me to do it so i'm inclined not to treat the crank i hadn't planned on it.

Re head the alpina head and cam were missing so i've had a head fettled a few years ago and i'll buy a cam from schrick.

[Felix79]

Well as always Si good write up and can't wait to see the next installment of the Alpina saga!

[Andyboy]

It all depends what steel the crank is made from. If it's EN40B, then it can be Nitrided. If it's the more common EN16T, it will need tuftriding.

iirc, 0.25mm is 10 thou which is okay for big ends. Even 20 thou on the mains is alright - it's when you start milling 20-30 thou off the big ends that it starts to get a bit hairy.
On BMC and Ford stuff - particularly cranks which were nitrided EN40B, 20 thou meant re-nitriding for serious use and 30 thou was effectively scrap.
I'm not sure if any M20 cranks were nitrided, or even made from EN40 or 41 steel.

[Speedtouch]

Eta 2.7 crank is cast, according to this article, so maybe the Alpina one is also?

http://en.wikipedia.org/wiki/BMW_M20

Here's an interesting article about them also:

http://www.metricmechanic.com/pdfs/metr ... ooklet.pdf

Page 12 states:

"BMW used cast iron
cranks in the following engines.
320/6 - 71mm stroke
323i - 76mm stroke
325e - 81mm stroke
325i/E30 - 75mm stroke
325i/E36/E46 - 75mm stroke"

[Simon13]

its a forged steel crank from the diesel 324td engine.

Alpina 2.7s use NOTHING from an eta engine. zip. diddly squat

[Speedtouch]

It should be OK to use as is then.

This article supports this:

http://www.hoigto.com/tech/crankgrind.htm

[Demlotcrew]

Ok thats all great, but still begs the question, who is Dude and what risks is he taking?

[Simon13]

I picked up a set of M52 135mm rods off DanThe at gaydon yesterday so thanks for that bert.




Quick clean up






Then having a fiddle i noticed the M20 rod bolts i have are a fair bit longer! As the bottom pic shows. I'm sure it wouldn't be a problem but if i'm using different rods then i might aswell use the correct bolts for them? Makes sense to me.





Had to trial fit the shells and see if it fits the crank etc. All seems ok!




So here is everything i think that bolts to the crank. So this lot is what is needed to get the bottom end balanced. Then i can build the bottom end!


I've a good shopping list of parts for BMW 2moro and lots of other jobs and people to start chasing for the top end now.

But along those lines i've had the injectors cleaned @ Boxer Motorworks in Ashford middlesex. They've been around years and some may remember they did the tourings injectors also. Also the touring has a lot of service history from there but anyhow.......





Full shizzle £117 they charged

Heres what the bit of paper tells me

Flow rate before cleaning

No. 1 38
no. 2 39
no. 3 39
no.4 39
no.5 37
no.6 38


After

1 41
2 41
3 41
4 41
5 41
6 41

with the comment even flow and spray pattern, also new pintels, filler backets top and bottom O rings and spacers - whatever they are.

So that should help, its all in the right direction!

[DanThe]

Fck me you got burgled for those injector refurbs You not seen the zones own injector specialist?

Rod bolts are only about £20 IIRC

[Simon13]

nope i guess its alot less, too late now!

[Simon13]

So the story goes, i dropped my bottom end off on saturday at this place




Roland Allsop he comes highly recommended on the balancing front. Well infact this is a one stop kind of place. So i could of had the crank ground and the block bored out all here but i didn't know that then


Anyhow i had a call today saying it was done! Being rained off i was round in a jiffy




F**k me this is heavy lifting this lot on its own, surprised it makes any power being this heavy!



couple of extra holes in a few webs





yellow marks to line it up, luckily both the flywheel and vibration damper only fit 1 way to help things



One small bit out of this, shows you how good this was from factory really!






Being a full bottom end balance the rods and pistons where done also, Do they balance the caps and rods seperatley?






No.6 slug seems to have been the heavy one here





They gave me this sheet, i don't understand this! He told me they only balance the nascar bottom ends to 0.5 and my bottom end is a bit better than this. I showed this to one of the guys in my old mans workshop who reckoned a job well done as he used to do it for another firm.


Lots of people offer this balancing lark but the machine used by Roland is a bit special and only another 2 are over here but they are not in a small workshop/shack like his that plebs like me can utilise its services!

They charged me £20 less as all my parts where clean which makes a difference so they say



So whilst the money pot has been heavy i've had a proper eye watering bender at the main dealer too!




main bits here oil pump, water pump plus some other bottom end bits. Although i am mad i baulked at £66 for a tensioner when GSF supply this quality one for £12







Big haul here, i'm hoping in vain a genuine head gasket will mean it won't leak at the front corner as quick as the GSF/ECP ones do! but i'm a realise this is probably a pipe dream



Whats the difference? Well i got 6 genuine rockers cheap, then BMW wanted £40 a rocker so i've bought 6 febi bilsteins from GSF, they're a third of the price. Also 12 new eccentrics



don't f**k about, i don't want this to sh!t itself and some fresh coolant pipes all round should help this.


Head is at the machine shop getting new exhaust valve guides and a machine cut on the seats. Although i think i'll need a few new valves as the tops on a couple are not very clever.


This is epic and a long time coming, i can finally finally build the bottom end. Its all here in the garage! slight problem being my engine stand is in use with a brand new S50 on it so someone needs to buy this so i can start! But life is throwing broken f**king Z3's at me and a private job at me first. But we are making big inroads.

I've only a few bits left to buy now, dizzy cap £112 from BMW some NGK spark plugs. Oil pump spindle. Trevor to repaint the inlet and rocker cover.

Also spoke to jon bmw today about getting the exhaust system sorted out for this in the next few months, using the touring as a model first to fit it too. Then i can just unbolt the whole system off and onto the 2dr. Easy

[Dezzy]

Goods good Si.

Looking forward to seeing the donkey put together.

[Jhonno]

Engine porn..

[Dezzy]

Looks good Si.

Looking forward to seeing the donkey put together.

[Simon13]

just got in from looking at a ropey manual 325i touring as a car to fit the engine into and run it in this winter.

its a hound with all the usual issues worn seats, f**ked dash saggy headlining but a years ticket and tax Nov. The good bits are 217,000 miles and light front end crash damage I'm hoping £300 gets it and i think its a breaker afterwards, but we'll see how it goes. Its black with 15bbs and a tech 2 wheel.

[E30BeemerLad]

I bet you won't be able to help yourself and a mini-resto will result

[Simon13]

needs a headlamp, grill, passenger wing, bonnet and valance. Its not pushed the slam panel at all so all good, i can't i'm not going down that route. If it passed you on the road you'd think its quite tidy bar the damage

engine ran well oil pressure light was mega quick from cold which is rare on an M20 let alone one with that milege!

[darren_mk]

Excellent engine work Simon, reading this with interest as i have it all ahead of me, unless you fancy doing another one?

[Blitz]

just got in from looking at a ropey manual 325i touring as a car to fit the engine into and run it in this winter.

its a hound with all the usual issues worn seats, f**ked dash saggy headlining but a years ticket and tax Nov. The good bits are 217,000 miles and light front end crash damage I'm hoping £300 gets it and i think its a breaker afterwards, but we'll see how it goes. Its black with 15bbs and a tech 2 wheel.

That will be a sleeper.

[Simon13]

I had a really sad thought of getting all the engine in bits and laying it out on the floor exploded styleeee like bmw do with their M-power donks! But maybe not as thats uber sad.

We'll have a step by step picturethon as you can see my mistakes like on the touring engine with the oil seals the wrong way round!

Little bit of a love triangle with this touring just spoke to the owner whos a bit attatched to it. Hard to tell them whilst being nice its the usual e30 wanker state now. But i'd recycle it to the last nut and bolt when i'm done! Its quite low also 60/40 but i shall wait as i think it will take some wiggling to get it. I told him i'm looking for something and i'll buy anything else that comes along

[Simon13]

matey is faffing with the wagon, so a 2dr 325i has been found of a nice man called peterpace. Its bronzit FTW a true pervert colour on bottle tops. Epic, just need to pick it up.

2.7's and bottletops can be scary!

[Blitz]

Is it a pre-facelift?

[Simon13]

no, brown interior!

[pacerpete]

Distressed nutria velour FTW

[glenn]

bronzitbeige

[Andyboy]

Pete will have spent most of today sniffing the drivers seat.

[B7]

Was this that rusty turd at the pub in Dorking Peter?

[pacerpete]

Pete will have spent most of today sniffing the drivers seat.

As well as raking through the footwells and under the seats for stray coppers !

[Andyboy]

Pete will have spent most of today sniffing the drivers seat.

As well as raking through the footwells and under the seats for stray coppers !

After digging down through 4 inches of fag ash?

She's well stacked on the top bollock front, but like the Lamberts.

[capri_rob]

Bronzit FTW

Pics !!!

[Jhonno]

Nice..