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Re: M3 Evo master cylinder question...

Post by Gav. » Sat Jun 02, 2012 11:52 pm

3 from the reservoir, and two hardlines. I think the hard lines would flex enough to allow you to fit them easily. If not, rub them gently with your thumb to warm them up, and bend them very slowly (and carefully) until they're where you want them to be :)

If you need an Evo one (3 lines), i have a servo, MC and reservoir sat here that i can't use. Yours for postage if you want it, because i can't guarantee it works (it did come from a working car though).

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Re: M3 Evo master cylinder question...

Post by MParallel » Sat Jun 02, 2012 11:56 pm

^^

Thanks, I'll keep that in mind!

Checking the ETK, doesn't make much sense as well.

It lists 3 numbers, of which 2 are identical. Both numbers, are listed for ASC+T, so one of these 2 is also listed as without this !?).

I'm looking at LHD numbers, but it still lists one a "Left hand drive" which is the one number only listed once. Still there?

The one without ASC+T is listed as 9/94...onwards

The one for ASC+T with the same P/N is listed as 9/96...onwards

The number listed once (for ASC+T as well) is listed as ...to 9/96

This can only mean that around the facelift date, they also changed something else on the 328i.

WEIRD! So one version that predates ASC+T can also be used on ASC+T cars after 9/96, but not before.
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Re: M3 Evo master cylinder question...

Post by Gav. » Sat Jun 02, 2012 11:59 pm

Using my chassis number (RHD 328i), the servo P/N is 34331162965, MC P/N is 34311163711, and the reservoir P/N is 34321160225

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Re: M3 Evo master cylinder question...

Post by MParallel » Sun Jun 03, 2012 12:08 am

Interesting. MC is the same, but the reservoir 34321160225 is RHD only, while the one in the LHD diagrams is listed for both LHD and RHD (!?).
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Re: M3 Evo master cylinder question...

Post by Gav. » Sun Jun 03, 2012 12:18 am

The reservoir being different could be to do with the pipes coming out of it, as they could be on the right (looking from the front of the car towards the back) on the RHD, and the left on the LHD. BMW make things far too complicated, lol.

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Re: M3 Evo master cylinder question...

Post by MParallel » Sun Jun 03, 2012 12:27 am

Gav_328T wrote:The reservoir being different could be to do with the pipes coming out of it, as they could be on the right (looking from the front of the car towards the back) on the RHD, and the left on the LHD. BMW make things far too complicated, lol.
That was my idea as well, but why would your RHD only be listed for RHD, while "mine" is listed for both? Maybe that is the difference between 3/5 pipes.

Any pics of your 5 lines?
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Re: M3 Evo master cylinder question...

Post by Gav. » Sun Jun 03, 2012 12:32 am

Only what is in that other thread. I'll take some tommorrow though. I need to get round to fitting my 3.0 MC :P

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Re: M3 Evo master cylinder question...

Post by MParallel » Sun Jun 03, 2012 12:48 am

Gav_328T wrote:Only what is in that other thread. I'll take some tommorrow though. I need to get round to fitting my 3.0 MC :P
Ha yes of course. Didn't even check that yet. Did now. I'm going to check mine tomorrow and see what I have.

"The difference is obvious, it's about half an inch longer. This is likely to be the reason for the better pedal feel, as it doesn't have to travel so far before it's moving the MC. I'm going to look at extending the 328i one, to see if that will be an easy fix."

Well you already found out by now, but it's not only longer, the housing (read: piston) is bigger as well. So for every mm movement, more fluid is moved. This is what reduces travel.

I guess that's why you need the servo as well, as the Evo one will have the "pin" further back to compensate the extra lenght. Otherwise the brake pedal would be in a really strange high position in the footwell. At least I can imagine.
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Re: M3 Evo master cylinder question...

Post by Gav. » Sun Jun 03, 2012 1:20 am

T1000 found out the hard way, if you try using the 3.2 MC, and a standard 328i servo, the brakes lock on, as it compresses the piston in the mc and applies the brakes. He modified the 3.2 one so it was slightly shorter, and retained the 328i servi. From what i've found out, he could have just used the 3.0 one for the same effect, but no modifying required.

I'll do a proper write-up on it at some point, my posts in that thread are bit confusing :)

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Re: M3 Evo master cylinder question...

Post by MParallel » Sun Jun 03, 2012 1:24 am

Gav_328T wrote:T1000 found out the hard way, if you try using the 3.2 MC, and a standard 328i servo, the brakes lock on, as it compresses the piston in the mc and applies the brakes....
So how is this bad then? I think I don't get it!?
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Re: M3 Evo master cylinder question...

Post by Gav. » Sun Jun 03, 2012 10:00 am

It's bad because until you modify the end of the 3.2 MC, the car won't move with it fitted :)

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Re: M3 Evo master cylinder question...

Post by Gav. » Sun Jun 03, 2012 1:33 pm

Standard 328i MC, Servo and reservoir (5 line)

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Re: M3 Evo master cylinder question...

Post by Prince » Sun Jun 03, 2012 5:08 pm

If it's any help this is what the 3.0 M3 M/S and servo looks like:

Image

Image

That's fitted into a 318is (M42). It bolts in, but I (I say I, but it was actually a mate of mine that fitted it) needed to modify the brake pipe to reach properly.

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Re: M3 Evo master cylinder question...

Post by Gav. » Sun Jun 03, 2012 5:21 pm

I've just fitted the 3.0 MC to the touring using the standard servo and reservoir, no modification needed. It doesn't feel much different, but i've also done a quick test to make sure they work.

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Re: M3 Evo master cylinder question...

Post by MParallel » Sun Jun 03, 2012 7:48 pm

Gav_328T wrote:I've just fitted the 3.0 MC to the touring using the standard servo and reservoir, no modification needed. It doesn't feel much different, but i've also done a quick test to make sure they work.
Interesting. Wonder if it would be much different if you also fitted the servo.

Did you rebleed? I'm sure detaching the brakepipes feeds air into them..?
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