McDade

can anyone tell me which autozone part number is the 90-91 ex master cylinder that alot of people are using for their MS upgrade?

the 1.6 engine civic has this listed
FENCO_REMAN M52517 LLT $45.00core $51.99

the 1.5 engine civic has this listed
FENCO_REMAN M52280 LLT $35.00 core $50.99

Help please

oh and a side question can i use a 89 crx dx reservoir with the ex master cylinder?

XrcR6

I had gotten a Honda OEM part (15/16" MC) so can't confirm the Autozone p/n. But the 90-91 Civic EX Sedan only came with the D16A6. Therefore it should be what they are calling the "..1.6 engine...". So I guess that would be the first entry you listed.

The only thing I'd be worried about, is the way they are listing things. They just say Civic, who knows if they were aware of all the iterations (Civic hatch, Civic Sedan, Civic Wagon, Civic CRX) and the subtle differences amongst them.

On the second question, yes the reservoir's are interchangeable. Not sure on the Autozone one, but OEM Civic EX ones are larger to go with the larger capacity of the MC. Not a big deal though, most people have to use the smaller one to clear a strut bar, etc.

McDade

thanks

XrcR6

No prob. I was searching for the Honda p/n I remember someone posted once and I accidentally found the autozone one:

https://honda-tech.com/zero...84067

It's actually a thread from the EG forum, they can use it too. Clifnotes: P/N M52517

McDade

sweet thanks again

fastcrxsi90

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by McDade &raquo;</TD></TR><TR><TD CLASS="quote">oh and a side question can i use a 89 crx dx reservoir with the ex master cylinder? </TD></TR></TABLE>

i think the base of the reservoir is a larger diameter on the ex MC...i think...ill go down to the garage in a little and double check.

i believe the reservoir is the same as the 90+ integra...they are more common in the junkyards.

ShiroX

are you using the 90-91 Ex Booster also?

because u can keep your stock booster and run the 88-91 Prelude SI MC

the bolt pattern is the same as your stock crx booster...the only modification needed is to bend the front line that goes into the MC straight.

prelude mc is also 15/16 btw

McDade

https://honda-tech.com/zerothread?id=657706

according to that link i can use my stock booster with the ex master cylinder

that is what i was planning on

ShiroX

i remember now why i went with the prelude MC...

most of the autoparts chains do not carry the 90-91 EX MC in stock

but the preludes are in stock

so that link is correct and you will be able to use the 90-91 MC with stock booster

sorry for the confusion

Eggman

I did mine a few months ago and the receipt says #M52517. And yes you can use your original reservoir. I went to 5 or 6 different Autozones to find the right one. Some of them had the smaller MCs with that part number. Guess it all depends what people give them as a core.

You can save a buck or two, buy using the 86-89 Accord or 88-91 Prelude 15/16" master cyclinders. Those require a tiny bit of bending of the front line, though.

Read Driven's nice write up, http://thezam.org/kam/ (it's under 'Tech'...).

Also here, https://honda-tech.com/zerothread?id=456037

McDade

VTeC4TheChildren

yea i had to have autozone order the mc.

Eggman

yea i saw that post when i was scouring the archives today.
Lookout autozone i'm returning my 89 crx dx mc as the core

davens

People always dick around with the Integra and Civic EX larger units with mixed results.

I've done three different Accord MCs...specifically 89 LXi that is 15/16"...I've never had to "rebend" a line and it bolts right to the stock CRX booster.

slywfbpsi

autzone doesn't have a part number for the ex, all they have is 1.5 or 1.6, as mentioned earlier. so I just bought a 1.6 one. don't know the part number but, the reservoir was alot bigger than the one I took off of my 1.5. It cleared my strut bar as well. Napa does differentiate between si and ex though, but they never have the ex in stock, and their prices are higher than autozone.

McDade

well i got the ex MC and guess what?

i need the booster also, the mounting holes are in the incorrect position

slywfbpsi

are you sure they didn't give you the station wagon part number by mistake? it should bolt up fine, the station wagon and sedan have two different part nube m52517 sedan, and m52515 wagon.

seekerONE

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slywfbpsi &raquo;</TD></TR><TR><TD CLASS="quote">are you sure they didn't give you the station wagon part number by mistake? it should bolt up fine, the station wagon and sedan have two different part nube m52517 sedan, and m52515 wagon.</TD></TR></TABLE>

IF the mounting holes are incorrect then you got a integra master cylinder by mistake