STOP master brake cylinder talk - Subaru Enthusiasts Car Club of the Sierras

A1337STI · 2010-08-04, 10:02 AM

Quick Question, Is there really a difference between the master cylinder for an automatic impreza and a manual impreza?

My cylinder is going out (had a few scary moments on stage)

http://www.rockauto.com/catalog/rafr...&parttype=1836

I Tried to order the $51.79 Part (MT non-ABS) specific one but it got back ordered basically indefinitely

And none of the other ones seems to be quite right for my car, Except the Centric for $159

I would think that the 73.79 one is good,w/Power Brakes; Bore = 13/16"; w/o ABS but it says for Automatic transmission .. I don't recall ever seeing a brake line go to or from the transmission, so is the master cylinder really transmission specific? (it doesn't mount to the transmission) I'm confused.

an extra $70 to have brakes on stage is well worth it, but am i just throwing money away buying the $159 version over the 73.79 ?

A1337STI · 2010-08-04, 10:10 AM

140 for a remanufactured napa one , or $220 for napa new ...

I don't really want a remanufactured one though

Kevin M · 2010-08-04, 10:52 AM

Basically, you just need to make sure it has the right brake line ports in the right place. There might be piston diameter differences as well, but it won't make it not work and may even help.

It's common for the piston diameter or booster design to change from manual to automatic, and for the lines coming from the MC to differ in position or number, especially from ABS to non-ABS.

Oh, and reman is fine. Generally it just means honing the cylinder and replacing the piston with the next size up, just like engine pistons. If it saves money, don't be afraid of reman parts.

A1337STI · 2010-08-05, 08:11 AM

Cool beans, i won't risk getting the Automatic one (really need this part before Gorman)

Generally I'm pick and pull, used part, reman part whore. but when it comes to my brakes (or safety products) I've always gone new. so think my options are 140 for napa reman or 154 for rockauto (new) ? i'll probably pony up the extra 14

cody · 2010-08-05, 08:46 AM

Can you rebuild yours? I know that goes against your understandably cautious policy regarding safety parts on your car, but I think it's something people do when they're on a budget?

van · 2010-08-05, 10:12 AM

Some good info on upgrading here

2010-08-04, 10:02 AM	#1
A1337STI EJ205 Join Date: Jan 2006 Location: Reno, NV Posts: 1,840 Car: Impreza and an Impreza Class: AS / CRS PerfStock "pedal on the right"	STOP master brake cylinder talk Quick Question, Is there really a difference between the master cylinder for an automatic impreza and a manual impreza? My cylinder is going out (had a few scary moments on stage) http://www.rockauto.com/catalog/rafr...&parttype=1836 I Tried to order the $51.79 Part (MT non-ABS) specific one but it got back ordered basically indefinitely And none of the other ones seems to be quite right for my car, Except the Centric for $159 I would think that the 73.79 one is good,w/Power Brakes; Bore = 13/16"; w/o ABS but it says for Automatic transmission .. I don't recall ever seeing a brake line go to or from the transmission, so is the master cylinder really transmission specific? (it doesn't mount to the transmission) I'm confused. an extra $70 to have brakes on stage is well worth it, but am i just throwing money away buying the $159 version over the 73.79 ? __________________ Fighting uphill battles, one bullet at a time!

2010-08-04, 10:10 AM	#2
A1337STI EJ205 Join Date: Jan 2006 Location: Reno, NV Posts: 1,840 Car: Impreza and an Impreza Class: AS / CRS PerfStock "pedal on the right"	140 for a remanufactured napa one , or $220 for napa new ... I don't really want a remanufactured one though __________________ Fighting uphill battles, one bullet at a time!

2010-08-04, 10:52 AM	#3
Kevin M EJ22T Join Date: Sep 2003 Location: Reno Posts: 9,445 Car: '93/'01 GF6, mostly red Class: 19 FP	Basically, you just need to make sure it has the right brake line ports in the right place. There might be piston diameter differences as well, but it won't make it not work and may even help. It's common for the piston diameter or booster design to change from manual to automatic, and for the lines coming from the MC to differ in position or number, especially from ABS to non-ABS. Oh, and reman is fine. Generally it just means honing the cylinder and replacing the piston with the next size up, just like engine pistons. If it saves money, don't be afraid of reman parts. __________________ FWD is the new AWD

2010-08-05, 08:11 AM	#4
A1337STI EJ205 Join Date: Jan 2006 Location: Reno, NV Posts: 1,840 Car: Impreza and an Impreza Class: AS / CRS PerfStock "pedal on the right"	Cool beans, i won't risk getting the Automatic one (really need this part before Gorman) Generally I'm pick and pull, used part, reman part whore. but when it comes to my brakes (or safety products) I've always gone new. so think my options are 140 for napa reman or 154 for rockauto (new) ? i'll probably pony up the extra 14 __________________ Fighting uphill battles, one bullet at a time!

2010-08-05, 08:46 AM	#5
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Can you rebuild yours? I know that goes against your understandably cautious policy regarding safety parts on your car, but I think it's something people do when they're on a budget? __________________ Slow and low, that is the tempo.

2010-08-05, 10:12 AM	#6
van SECCS Brewmeister Join Date: Oct 2005 Location: on the edge of a marsh Posts: 1,451	Some good info on upgrading here

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