B7's C2.7 Build - FINITO!!!!!!

[Simon13]

but they must all be the same me lord!

[Jhonno]

Si, I would say they wouldn't be all the same currently due to the nature of the casting process, and the apparent lack of finishing done

if you get scared maybe chat to MED in Sussex about just cleaning the ports up, sure it won't be too expensive

[B7]

I'm not going to change the shape of the ports. I'm going to treat it like flatting back orange peely paint. just get them so the low spots are just about visible, no further. The basic shape of the ports cannot alter drastically if I stick to those rules.

[bss325i]

Dave, the head looks likeits been reshaped in the combustion chamber area.

Now looks hemispherical to me, ala Alpina.

[Simon13]

linky no work

[bss325i]

linky no work

Edited.

[Simon13]

is that the head you sold March? You can see where the meat has been taken off between in the valves opposite the spark plug

[B7]

No, thats the same photo Oakey posted earlier. Not sure i'd trust myself to go that far.

[oakey]

is that the head you sold March? You can see where the meat has been taken off between in the valves opposite the spark plug

That's my head.
What would be the purpose of that to the combustion chamber?

[Simon13]

Well i don't know the ins and outs but the standard head is that of a swirl design which is different. Alpina seem to like Hemi heads. I think it alters power or the way the fuel/air mix in the chamber i don't really know.

[bss325i]

Early CVH Engines have hemispherical combustion chamber shape and later Lean Burn CVH's have a different shape combustion chamber, more kideny shaped.

The earlier ones fly!

[B7]

Early CVH Engines have hemispherical combustion chamber shape and later Lean Burn CVH's have a different shape combustion chamber, more kideny shaped.

The earlier ones fly!

Please don't bring those sludgy old ford donks into it!!!!

[B7]

Right, Vines rang me today. "Mr White, all of your shiney components are now here ready for collection".

So I picked them all up and NOW the fun starts.

Don't look like the best part of 500 quid laid out do it??







I've not got the shells out yet but they look IDENTICAL even down to the part number stamp. The only difference is the part number on the packet and ones got a blob of red paint and the other a blob of blue. I f*ckin' hate having my trousers pulled down so there'd better be more of a difference that that!

[Simon13]

I love new parts! i'll be gathering a similar sellection soon it seems

[E30BeemerLad]

Nice haul there Trebor, but shit the bed 500 bullits, I salute you sir

[Jhonno]

I've not got the shells out yet but they look IDENTICAL even down to the part number stamp. The only difference is the part number on the packet and ones got a blob of red paint and the other a blob of blue. I f*ckin' hate having my trousers pulled down so there'd better be more of a difference that that!

I thought you were supposed to match colours?

[Simon13]

We think they must be slightly different in their coating on top of the brass as oneside will be subject to more pressure when the engine is running possibly.

On the power stroke during the cycle maybe?

[B7]

I've not got the shells out yet but they look IDENTICAL even down to the part number stamp. The only difference is the part number on the packet and ones got a blob of red paint and the other a blob of blue. I f*ckin' hate having my trousers pulled down so there'd better be more of a difference that that!

I thought you were supposed to match colours?

I've been round in circles on this one. The ETK (same as realoem) shows 6 blues and 6 reds per engine. The blues go in the conrod and the reds in the end cap. The Bentley manual states that "reds are the most common"! So I ordered all reds, only for vines to come back to me to say thet the system would not allow 12 of the same colour shells to be ordered on one engne. The system states 6 blues and 6 reds. So thats what I've ended up with. As Simon says, it must be down to the thickness of the white metal coating being thicker on the thrust side. Heres the realoem link and note 6 of each (no's 5 and 6) listed.


http://www.realoem.com/bmw/showparts.do ... g=11&fg=20

[Simon13]

I've just been to my local dealer and guess what?

On the big ends, Blues top, reds bottom

Mains, whites top and either white,green or yellows bottom

This what you going by also Trevor?

[B7]

I've just been to my local dealer and guess what?

On the big ends, Blues top, reds bottom

Mains, whites top and either white,green or yellows bottom

This what you going by also Trevor?

Spot on my man. Blues in the conrods, reds in the caps.

[Simon13]

What about the mains Trev or are they all one colour as such?

[B7]

My mains are all spotless so I've not had them out, But i've just checked Realoem f*ck me, it's even more confusing. No. 4 is a top shell and No.5 is an endcap shell.
It lists 3 colours for each. So do you pair whites with whites, greens with greens?

04 BEARING SHELL YELLOW 60,00MM(0) 6 03/1988 11211706847 $13.62
ONLY IN CONJUNCTION WITH ITEM 5
04 BEARING SHELL GREEN 60,00MM(0) 6 03/1988 11211706848 $13.62
ONLY IN CONJUNCTION WITH ITEM 5
04 BEARING SHELL WHITE 60,00MM(0) 6 03/1988 11211706849 $13.62
ONLY IN CONJUNCTION WITH ITEM 5
04 BEARING SHELL YELLOW 59,75MM(+0,25) 6 03/1988 11211706850 $13.73
ONLY IN CONJUNCTION WITH ITEM 5
04 BEARING SHELL GREEN 59,75MM(+0,25) 6 03/1988 11211706851 $16.74
ONLY IN CONJUNCTION WITH ITEM 5
04 BEARING SHELL YELLOW 59,50MM(+0,50) 6 03/1988 11211706864 $16.74
ONLY IN CONJUNCTION WITH ITEM 5
04 BEARING SHELL GREEN 59,50MM(+0,50) 6 03/1988 11211706865 $16.74
ONLY IN CONJUNCTION WITH ITEM 5
04 BEARING SHELL WHITE 59,50MM(+0,50) 6 03/1988 11211706866 $16.74
ONLY IN CONJUNCTION WITH ITEM 5
05 BEARING SHELL YELLOW 60,00MM(0) 6 03/1988 11211717526 $13.62
ONLY IN CONJUNCTION WITH ITEM 4
05 BEARING SHELL GREEN 60,00MM(0) 6 03/1988 11211717527 $13.62
ONLY IN CONJUNCTION WITH ITEM 4
05 BEARING SHELL WHITE 60,00MM(0) 6 03/1988 11211717528 $13.62
ONLY IN CONJUNCTION WITH ITEM 4
05 BEARING SHELL YELLOW 59,75MM(+0,25) 6 03/1988 11211717779 $13.73
ONLY IN CONJUNCTION WITH ITEM 4
05 BEARING SHELL GREEN 59,75MM(+0,25) 6 03/1988 11211717780 $16.74
ONLY IN CONJUNCTION WITH ITEM 4
05 BEARING SHELL WHITE 59,75MM(+0,25) 6 03/1988 11211717781 $16.74
ONLY IN CONJUNCTION WITH ITEM 4
05 BEARING SHELL YELLOW 59,50MM(+0,50) 6 03/1988 11211717782 $16.74
ONLY IN CONJUNCTION WITH ITEM 4
05 BEARING SHELL GREEN 59,50MM(+0,50) 6 03/1988 11211717783 $16.74
ONLY IN CONJUNCTION WITH ITEM 4
05 BEARING SHELL WHITE 59,50MM(+0,50) 6 03/1988 11211717784 $16.74
ONLY IN CONJUNCTION WITH ITEM 4


It's the same with the thrust bearing with no.2 being the upper shell and no.3 being the lower.

02 GUIDE-BEARING SHELL YELLOW 60,00MM(0) 1 03/1988 11211706829 $25.11
ONLY IN CONJUNCTION WITH ITEM 3
02 GUIDE-BEARING SHELL GREEN 60,00MM(0) 1 03/1988 11211706830 $25.11
ONLY IN CONJUNCTION WITH ITEM 3
02 GUIDE-BEARING SHELL WHITE 60,00MM(0) 1 03/1988 11211706831 $25.11
ONLY IN CONJUNCTION WITH ITEM 3
02 GUIDE-BEARING SHELL YELLOW 59,75MM(+0,25) 1 03/1988 11211706832 $33.48
ONLY IN CONJUNCTION WITH ITEM 3
02 GUIDE-BEARING SHELL GREEN 59,75MM(+0,25) 1 03/1988 11211706833 $33.48
ONLY IN CONJUNCTION WITH ITEM 3
02 GUIDE-BEARING SHELL WHITE 59,75MM(+0,25) 1 03/1988 11211706834 $33.48
ONLY IN CONJUNCTION WITH ITEM 3
02 GUIDE-BEARING SHELL YELLOW 59,50MM(+0,50) 1 03/1988 11211706855 $33.48
ONLY IN CONJUNCTION WITH ITEM 3
02 GUIDE-BEARING SHELL GREEN 59,50MM(+0,50) 1 03/1988 11211706856 $33.48
ONLY IN CONJUNCTION WITH ITEM 3
02 GUIDE-BEARING SHELL WHITE 59,50MM(+0,50) 1 03/1988 11211706857 $33.48
ONLY IN CONJUNCTION WITH ITEM 3
03 GUIDE-BEARING SHELL YELLOW 60,00MM(0) 1 03/1988 11212241934 $25.11
ONLY IN CONJUNCTION WITH ITEM 2
03 GUIDE-BEARING SHELL GREEN 60,00MM(0) 1 03/1988 11212241935 $25.11
ONLY IN CONJUNCTION WITH ITEM 2
03 GUIDE-BEARING SHELL WHITE 60,00MM(0) 1 03/1988 11212241936 $25.11
ONLY IN CONJUNCTION WITH ITEM 2
03 GUIDE-BEARING SHELL YELLOW 59,75MM(+0,25) 1 03/1988 11212241937 $33.48
ONLY IN CONJUNCTION WITH ITEM 2
03 GUIDE-BEARING SHELL GREEN 59,75MM(+0,25) 1 03/1988 11212241938 $33.48
ONLY IN CONJUNCTION WITH ITEM 2
03 GUIDE-BEARING SHELL WHITE 59,75MM(+0,25) 1 03/1988 11212241939 $33.48
ONLY IN CONJUNCTION WITH ITEM 2
03 GUIDE-BEARING SHELL YELLOW 59,50MM(+0,50) 1 03/1988 11212241940 $33.48
ONLY IN CONJUNCTION WITH ITEM 2
03 GUIDE-BEARING SHELL GREEN 59,50MM(+0,50) 1 03/1988 11212241941 $33.48
ONLY IN CONJUNCTION WITH ITEM 2
03 GUIDE-BEARING SHELL WHITE 59,50MM(+0,50) 1 03/1988 11212241942 $33.48
ONLY IN CONJUNCTION WITH ITEM 2

What have BMW advised Si?

[Simon13]

Colin who's been at my local dealer parts counter 30 years drew a blank!

I'll check all my part numbers and go from there i think.

[Jon_Bmw]

Can you not speak to the workshop controller nicely and look on his TIS(or BMW equivilent?). It should show what bearings go where...hopefully! If not, its pretty stupid and the techs would just be guessing-back 10 years ago when they did this sort of thing.

[Simon13]

they seemed to think the workshop wouldn't have the material anymore.

But there are loads of torque settings we need to find out also, sequences do's and donts!

[powelly]

Si, check out the microfiche I gave you, the info you need might well be on there.

[B7]

Si, check out the microfiche I gave you, the info you need might well be on there.

Good call.

[powelly]

Trevor, If it's going to be anywhere it'll be on the microfiche, they are genuine BMW dealer issue, there is a whole ring binder full covering all models. One of the slides is just titled technical Information, the others are workshop manuals, ABS manuals etc, just need to fire up the machine (which i also gave Si).

[SteSE]

Microfiche to pdf/tiff??? PM me

[B7]

Microfiche to pdf/tiff??? PM me

Sounds like a plan. Speak to Si tonight.

[B7]

Got some more done tonight. First thing was to have a clean up before opening any new bags of parts.




First up I rebuilt the oil pump. I could have bitten the bullet and done anothe £100+ on a new pump but you can rebuilt these for half the price. Here it is stripped with the new parts. The cogs were worn as you can see in the photos. The gold sections are wear. The top plate had minimal marks so was linished to remove them using a thick plate of glass and very fine wet and dry. You have to have a perfectly flat surface for this. I also replace the pressure valve spring for good measure.









Next the head had a final thinners clean off before the valves went back in. I lapped them all in the other night. New stem seals were fitted before putting the valves back in.








Finally the cam was cleaned and put back.






Remember I was going to play with the exhausts ports well heres how they turned out. Nothing as polished as Oakeys but much better all the same.




and for a comparison heres what they were like






Thats the lot for the head now until it's ready to go back on. Just prior to that I'll reassemble the rockers.

[Jhonno]

Looking good there Trevor!! (Nearly did it again..)

Ports look alot better.. What did you use?

[bss325i]

Good stuff Trev, meticulous as ever.

[Jhonno]

You not sticking a better cam in there btw?!

[B7]

Ports were done with emery cloth just to smoth them out the wet and dry followed but a vigorous buff with autosol.

Cam? Not at the mo. Running out of money to be honest. If it don't make the power I'm looking for then I'll maybe think again but just can't warrant it at the mo. Like i said, i'm not after high power figures just strong torque.