Master of Cylinders

[parkerbink]

Looks like mine. Whats the part #? Mine is 34 311 156 643. Were both of your lines to the MS the same diameter? This master cylinder seems to be the same size on both ports.



Were the pipes going to the ABS booster both the same size on your car?

[Chapel]

Here's my MC I bought from Jonathan Chan on the bimmerforums message board. It went in my '89 325i with no problems, direct fit. I like the firm pedal, but it does take more effort. Not sure what to compare it to since my old one went out shortly after buying the car.

http://e30tech.com/index.php?module=...d=596&viewkey=

Did you have to replace the brake lines or not?

[BimmerToad]

Damn! I had no idea I needed a 10mm break line :( guess it's not going in until next month.

You don't need a 10mm brake line. E30 M3s do (to replace a 12mm line), but normal E30s don't need to replace a line.

[parkerbink]

Assuming you need a 12mm connector, can't you get an adapter, 10mm to 12mm connect the adapter to the ms & the break line to the adapter?

[parkerbink]

So this ms I have is cool? with both ports the same?

[BimmerToad]

I believe they're both 10mm ports. But without actually having a 750 MC in my hands, I can't be certain.

[parkerbink]

My ms is from a 750 #34 311 156 643 it has both ports the same (see picture above) Are both Lines the same in a 90 325ic? I don't have the car here this second so I can't look.

[65Matt]

Did you have to replace the brake lines or not?

Nope, I just put the old ones back on. I dont know the exact part numbers. Here's the thread:

http://forums.bimmerforums.com/forum/showthread.php?t=192073&highlight=master+cylinder

[Chapel]

the brakes feel MUCH better with the big cylinder

check the side by side

[parkerbink]

Great to hear. I am doing mine when I get back from Laredo (postponed it waiting on the Treehouse CAB) gonna do the suspension, and breaks all at once!

[Chapel]

takes about an hour to remove and install it. Biggest issue is getting the lines out of the old master. you dont have much room to turn the screws so it takes a while just getting those screws out.
We were VERY deliberate with doing this install and it took us 2 hours to get it in and bled correctly (including bleeding the clutch hydros) and also go get new bleeder screws because mine broke... luckily we had 4 in stock in the parts department.

[parkerbink]

I am going to r&r the fluid I have no idea how old this fluid is. I bet 14 years lol.

[elemental]

So can a MC stick, in the since that it would not relese all the pressure to a line and cause a caliper apper like it was sticking ?