BMW E30 Chromie Rebuild Supercharged

[Rav335uk]

Thought i'd strip/paint and rebuild the ITB's ready for when they're needed.

[Rav335uk]

After pissing around today and not doing much this morning, I finally decided to pull the ITB's apart and start to clean and paint them.

After a few hours :roll: of freeing up bolts, cleaning faces and general spraying, I ended up from this:-



To this:-



The "Eagled" eyed of you will notice it's not the exact same part, but you get the idea :wink:
Only 2 more to go

[Rav335uk]

Had a little time to spare today, so got on with putting the pistons back in.
Oil'd up the bores, and put in all the pistons one by one.
The block was then turned over, new shells fitted and the rest fitted and torqued up as needed.





Decided to take the Oil pump apart and give it a clean before refitting.




And fitted.

[Rav335uk]

Only a small update to keep you happy.

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.

[Rav335uk]

Well, only a small update.

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.

[Rav335uk]

Well, only a small update.

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.

[Rav335uk]

This is gonna be awesome Good to see you over here Rav

Alright Adam, didn't know you were on here.

Correct, i need them for my m20b28

There is a template for S50 ITB's to fit onto the M20 head.
I'll see if I can find it.

[image]

M20 ITB????

Correct, i need them for my m20b28

[Adam.]

This is gonna be awesome Good to see you over here Rav

[Rav335uk]

nice progress I'm a fan of the big six swap. I wish I could find a e34 m30 in Australia but its almost impossible.

May seem like a stupid question, what wiring loom are you going to use on the engine the e34 adapted to the e30, or the m20 loom with the lengthened injector wires?

Hi,
i'm sure "Down under" you have access to other BMW's that carry the M30b35 engine, E24 6 series, E32 7 series, all M30's.
Wiring wise, on an N/A engine going into the E30, there isn't tens of wires to cut and reconnect, on my last project, the E30 cab, it was a total of 3 wires to swap over on the C101 plug.
YOu have the option of using the M20 loom, but there is alot of wiring then to make it work, best option is to use the M30 loom and swap over a few wires.

There's plenty of info on here.

http://www.e30zone.net/modules.php?name=Forums&file=viewforum&f=55

[Anthony B]

nice progress I'm a fan of the big six swap. I wish I could find a e34 m30 in Australia but its almost impossible.

May seem like a stupid question, what wiring loom are you going to use on the engine the e34 adapted to the e30, or the m20 loom with the lengthened injector wires?

[Rav335uk]

Had the block honed today too, needed doing as there was slight scoring on a few of the bores.




Here's a pic of a Zoners M30b35 Turbo, with ITB's, so it all fits.

[Rav335uk]

Looks good.

Any idea about m20 iTB?

M20 ITB????

[image]

Looks good.

Any idea about m20 iTB?

[Rav335uk]

One thing I did pick up on, the last inlet valve giude won't accept the valve.
The valve was difficult to remove, so after a bit of digging around, it needs to have a reamer sent down o get rid of the slight burring inside.
I've checked the valve, and all is good with that.
But it's seeming more and more likely this head has been rebuilt at some point.
So i'll be reaming the guide tomorrow too.

Ordered some more bits today, looks like they should turn up on Monday now, so weekend will be free to strip the ITB's and clean them, or have them soda blasted.