Noob M30B35 Build

[tig]

I just spoke with my machinist and told him about the raised portion. He said he had noticed this and assumed I was using a custom clutch.

He recommends I bring in this flywheel along with the stock one I have and he'll look at them. Option A is to machine down the already lightened one to provide the raised surface. Option B is to lighten the other one and use it. We will decide once he can have them both in hand.

Thanks everyone for being so diligent on my behalf!

[trevmmeister]

cek did you paint or powder coat your head?

[tig]

cek did you paint or powder coat your head?

No, I shaved it.

[OcCoupe]

My knob is powder coated.

[tig]

This diagram confuses me.



I thought the FPR end of the fuel rail was the "exit". If that's right then the fuel cooler cools the fuel on it's way back to the tank!?

[BuzzBomb]

This diagram confuses me.



I thought the FPR end of the fuel rail was the "exit". If that's right then the fuel cooler cools the fuel on it's way back to the tank!?

You are correct. Logically it doesn't make sense in a performance sense, but maybe they were taking the passive-aggressive approach by thinking it would be a bad idea to return hot fuel to the tank, which would possibly raise the temp of fuel being delivered to the engine? Or in extreme conditions they thought it might vapor lock on it's way back to the tank. If I had it in my car, I'd probably reverse plumb it.

[tig]

Thanks BuzzBomb. That sorta makes sense.

Even though I've replaced my heater valve I don't remember how the hoses hook up. RealOEM isn't much help and I don't have any good pictures.

This is the new hose, that I believe goes from the outlet (bottom) of the heater valve to the heater core.



1) This goes to the TOP nipple on the heater core, right?
2) This new hose with the hook is too long. I assume I need to cut it even though it has wider sections on the end. Is that right?
3) The output of the head (gooseneck) goes to the input on the heater valve. Right?

EDIT:

I found my old hose. It's clear it was hooked to the lower nipple on the heater core. It's way too short to have been connected to the top nipple.

Does it matter? Logically it makes sense to me you'd want the lower nipple of something that holds fluid to be the "exit". So it is possible that the PO had this hooked up backwards. Again RealOEM and my pics are no help.

[buzby]

I used to work with industrial engines, taking automotive gasoline engines and converting to industrial use. They were also EPA certified and operated with three way catalyst. Cooling the fuel on the return is correct. Once engine has run a while the return fuel increases in temperature, if not cooled in extreme situations can cause to much vapor in fuel tank, unwanted expansion of the fuel and heat the returning fuel to engine. This can cause power de-rate, vapor lock and other issues.
Dave

[tig]

I pulled the clutch off the old engine.

Interesting to see the wetness in there; not horrible, but the main seal was leaking as I suspected.



You'll recall that the REAL reason for this project is Vlad's starter was failing to engage. I had read that replacing the B34 start was such a bitch that I decided to spend a year building a whole new engine instead. Anyhoo, I was curious about how the starter was actually failing. The teeth on the flywheel are fine. The teeth on the starter are fine too. So I guess it is the solenoid just not engaging all the way all the time.



Old clutch. I have no idea if this is 'a lot of wear', 'moderate wear', 'no wear'. What do you experts say? Do people buy used clutches? What's this thing worth?



Lightened flywheel. vs stock E28/B34 flywheel.





It's not super clear in this pic, but the 'lip' for where the PP touches is maybe 1/4 a millimeter. This shows it better.



I'm still going to take both flywheels to my machinist and have him help make the call, but I can't believe that much material will have an impact on how tight the PP holds the clutch.

[tig]

Uh. Wow. I think I've done everything I could possibly do without the motor in the car!

Steering is back together.

Tomorrow we'll get 'er done. The engine is off the engine stand!

[tn535i]

On the fuel cooler. If you want to move heat from the fuel to something else it works best to do that on the hottest fuel with the greatest delta. That would be the return.

On the flywheel. I suggest again you put it on the crank with old bolts and snug it up and check runout. If the runout is minimal then work with it but if it's excessive you have a problem that won't go away regardless of what you do unless you machine the whole friction surfacr flat and rebalance. My biggest intial fear was runnout then the surface finish then the step. A new clutch probably means step is not a ig deal and you might get a liitel less life. There should be a spec for thickness on an old disc and yours does not look too bad. I'm thinking it has been replaced and the old flywheel also machined sometime reducing the step. I think this is common.

Not sure your machinist can check runnout as well as you can bolted to the actual crank. The precision and quality of a BMW crank is outstanding and the mounting surface of both parts should be very clean when going together.

Looking good.

[dsmith]

On the heater hose, yes bottom of heater core and cut to length.

[tig]

THE ENGINE IS IN!

CJ, his buddies, and my wife dropped the engine in tonight.



Smiles all around as it went in.




Took a few minutes to finagle it onto the engine mounts.



Julie's job was to hold the hood up. CJ's job was to be a know-it-all.



Looks awesome!







My job after dinner tonight is to get the wiring harness wrapped up.

Feels so damn good.

[wkohler]

Congrats. It looks better in the car than it did on a stand.

Spec on a new clutch is 10mm. The discs really never seem to wear out. Pressure plates get old and stuff but none of the BMW mechanics I know have ever replaced a clutch on an M30 due to wear.

[kzolee]

THE ENGINE IS IN!

*****

My job after dinner tonight is to get the wiring harness wrapped up.

Looks fantastic!

Don't forget the engine ground points, like me before first start...

[trevmmeister]

Is the head cover even bolted on?

[wkohler]

Is the head cover even bolted on?

No because he's going to need to refresh the head before it's done. Those are designed to be able to be removed or installed while the engine is in the car.

[unt0uchable]

That looks fan-fuckin-tastic! You must be relieved. Looks right at home in there all shiny and nice and shit.

Going to take a video of the first attempt at starting?

Can't to hear it roar.

[tig]

Is the head cover even bolted on?

No the valve cover is not bolted on. There's no oil in there yet (just assembly lube). I'll be putting in special break in oil, running it for 20min, then final torque of head bolts and a check of valve adjustment. Then new oil. Then drive.

[tig]

THE ENGINE IS IN!

*****

My job after dinner tonight is to get the wiring harness wrapped up.

Looks fantastic!

Don't forget the engine ground points, like me before first start...

Yea, I have these on my list. Thanks for the reminder...I'm sure I've fforgot something...

[tig]

That looks fan-fuckin-tastic! You must be relieved. Looks right at home in there all shiny and nice and shit.

Going to take a video of the first attempt at starting?

Can't to hear it roar.

Yep, it'll either be a candidate for America's funniest home video or epic. Next weekend is the goal.

[tig]

Coil.

The B35 coil is different than the B34 coil and the B35 plugs want you to mount it near the firewall.

I've seen others do this with custom brackets and with just bolting it to one of the nuts that holds the fuel cooler lines.

From the donor 735i grabbed this bracket, which I had thrown in with everything to get zync plated. I didn't remember what it was for, and I can't find it on the 735i diagrams on RealOEM, but I'm assuming it was the bracket that held the coil in place on the E32.



I bent it 90 degrees and I have three choices of where I can mount it.

One, on the firewall; either using one of the studs that hold the insulation in place or with some self tapping screws. This will be the easiest to mount and mostly 'out of the way'. Downside it it will be lower and thus closer to the headers; heat might be a concern.


Two, right above where the fuel cooler lines are held to the fender. This will be relatively easy to mount; two self-tapping metal screws/bolts. Downside is it will be a PITA to get to #5 & #6 spark plugs.


Three, farther to the rear; even more out of the way. But getting a drill in there to tap the holes for screws will be impossible.


Any thoughts or suggestions?

[tig]

On the flywheel. I suggest again you put it on the crank with old bolts and snug it up and check runout. If the runout is minimal then work with it but if it's excessive you have a problem that won't go away regardless of what you do unless you machine the whole friction surfacr flat and rebalance. My biggest intial fear was runnout then the surface finish then the step. A new clutch probably means step is not a ig deal and you might get a liitel less life. There should be a spec for thickness on an old disc and yours does not look too bad. I'm thinking it has been replaced and the old flywheel also machined sometime reducing the step. I think this is common.

Not sure your machinist can check runnout as well as you can bolted to the actual crank. The precision and quality of a BMW crank is outstanding and the mounting surface of both parts should be very clean when going together.

I don't know what runout is or how to measure it. Bentley's lists a "Clutch disc runout" but doesn't show where you measure it. Please advise. Thanks.

[tig]

Hmmm... New AC belt is too short. Somehow I got a 13x810mm belt (I believe from Blunt).

I'm using the B34/E28 compressor.

RealOEM calls for 12.5x800mm for the E28 and 12.5x855 for the E32.

The 865mm long belt I have for the PS pump is WAY too long, so the E32 belt, at only 10mm smaller will likely be too big too.

Can you buy belts in arbitrary lengths? I figure 820-845 will be about right.

[tig]

Crud. I wished I would have noticed this when I was splicing it in. The main relay connector from the donor B34 harness is busted and wont attach to the fuse box!

I need to find a replacement stat. Anyone local to Seattle have a B34 harness you'd be willing to snip about 4" off of?

[tig]

The M30B35 Swap FAQ does not explain the whole air filter housing thing very well.

It appears the choices are:

Use the B34 housing

• Must use B34 rubber boot between the AFM/MAF and throttle body.
• Can't use B35 valve cover mounting points for AFM, but must mount AFM to B34 air filter housing bracket.
• Looks oldskool next to the the modern B35 motor and hides the sexy powder coated B35 valve cover.

Use the B35/E32/E34 housing

• Requires heavy modification to the filter housing mounts welded to the fender, for which I can't find any pictures or instructions about.
• Uses mounts on top of valve cover.
• Sits so close to the valve cover that it actually rubs on the spark plug wires. Bob (Das Paracutefarfugnugen) had his #1 wire wear through.
• No obvious way to make it 'fit' to the headlight backing.
• Looks factory and better looking compared to the E28 housing. Sexy powder coated B35 valve cover is visible.

Use a cone style filter with custom extension tubing

• All the 'experts' say these filters are crap and the world will end if they are used.
• Must spend $$$ on fabricating tubing a heat shield. Some say TCD carries a kit, but I don't see it on the site.
• Looks sexy as hell (but not OE) compared to the E28 housing. Sexy powder coated B35 valve cover is visible.

Who else has done the B35/E32/E34 housing? Do you have instructions and pictures that show how you made it fit? Does it ACTUALLY fit (I'm super skeptical).

For now I'm going with the orignal B34 parts just to get running. This is muy disappointing.

Lots of stuffs hooked up this afternoon. Wire harness (mostly) wrapped (see previous post ). Coolant hoses mostly in place. Etc...

[Crazy_Canuck]

Can you buy belts in arbitrary lengths? I figure 820-845 will be about right.

Yes, yes you can!

[kzolee]

Coil.

The B35 coil is different than the B34 coil and the B35 plugs want you to mount it near the firewall.

It is different, but functionally the same. You can use the B34 coil on its original location.

[kzolee]

Who else has done the B35/E32/E34 housing? Do you have instructions and pictures that show how you made it fit? Does it ACTUALLY fit (I'm super skeptical).

It fits, I did it also.

Here's some information:

http://www.mye28.com/viewtopic.php?t=101481

[tig]

Coil.

The B35 coil is different than the B34 coil and the B35 plugs want you to mount it near the firewall.

It is different, but functionally the same. You can use the B34 coil on its original location.

Not if you want to use the B35 spark plug harness, unmodified.