Is there a brake master cylinder write-up?

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
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abscate
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Re: Is there a brake master cylinder write-up?

Post by abscate »

I thought my used one was in really nice shape and it is tested with a warranty too!

:-)

Line item from my Parts thread

Master Cylinder 9203845 $61 $81




Ask about our "Pay me when you get PhinisheD program." too
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Post by theWIFES_S70 »

Master Cylinder 9203845 61 $81

It doesn't fit the 98!!!!!!!!! ARG!

IPD is showing that it only fits the 99 and the 00 S70... You guys are your fancy ETMs! 8)
https://www.ipdusa.com/products/5175/11 ... r-cylinder

I like your installment plan!

Do you think I should swap out any clutch related parts as preventative maintenance?

Guess we're going to finally get a Master Cylinder write up soon...
1998 Volvo S70, N/A, 5-speed, 185K
2007 Volvo S40, 2.4i, 5-speed, 100K

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Post by abscate »

FCP had one on clearance, I think.
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Post by theWIFES_S70 »

So there really should be a write up, it's pretty straightforwards

Prepare for there to be brake fluid everywhere...

Move the electrical box aside... It'll give you a lot of extra room.

You need 11mm flare nut wrenches... I have these flare nut flex-head Gearwrench wrenches that were an absolute lifesaver.

14mm for the brake pressure sensor.

Some needle nose to take off the hose (this is what connects to the clutch, no?)

and 13mm (or 12mm?) sockets and extensions to take off the bolts holding on the master cylinder, again, I used flex-sockets here from Gearwrench and it made the job much easier...

And prayers that all that brake fluid doesn't ruin the ABS module...

All good right? Nope.

The holes that the brake lines screw into on the remanufactured master cylinder were different sizes!!! See picture below. I thought this was me.
s70_master_cylinder_reman_p.jpg
s70_master_cylinder_reman_p.jpg (162.67 KiB) Viewed 683 times
I ran to local autoparts stores, no master cylinders in stock...

I didn't get to put my order into FCP till after 4PM so we'll see if they'll come through. What absolute bull. :cry:

There's going to be some SERIOUS air in these brake lines now... :cry:

Is this my fault? Are there different sizes for the brake lines on some cars? Did I order the wrong master cylinder? I have an ABS module for TRACS. (I had a TRACs light on a long time ago... but I have no TRACS button inside the cabin... so I ordered a Master Cylinder for TRACS). Or was this a refurbishing error? I ordered both models to compare.... Figured it didn't matter since I'm sending them back anyhow.
1998 Volvo S70, N/A, 5-speed, 185K
2007 Volvo S40, 2.4i, 5-speed, 100K

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Post by abscate »

I can't think of why you would use different threads on a master cylinder. I'm guessing remanufacturing mistake
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Post by theWIFES_S70 »

Thanks for the support, my friend. Really bummed about this, I need to take her up upstate next week. I probably won't get my FCP order till Monday, gives me a daytime do this and to chase my KERFLUNK-sound... What a crap show! I really hope it'll be ok after this... Word about my ABS module... Brake fluid does that make me happy.

On another note, I had Pentosin Super4 in there and boy did it get dirty and brown in two years... I'll be trying out the Pentosin 4LV this time around.
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Post by theWIFES_S70 »

Just received another rebuilt Master Cylinder (Cardone 11-2843/ Volvo 9140897) and it has the same issue: the threaded hole closest to the brake booster is significantly wider than the 11mm brass brake line fitting in the car. Can I get some confirmation fellas? Are these two parts messed up?

From what I can gather, there are two brake master cylinders on FCP, one for cars with TRACS and one for cars without TRACS. The two that haven't fit are for cars with TRACS, so maybe that's the issue? (Even though I have TRACS... No button on the dash, but had a TRACS light on the dash which was remedied with a MattyMoo (TRACS) ABS module...)

The piece I pulled from my car is Volvo 9140251. Which doesn't show up anywhere, not even at Tasca...

I also ordered a brake master cylinder for cars without TRACS and that's arriving later today... Maybe that's the piece I need? Will update later.
1998 Volvo S70, N/A, 5-speed, 185K
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Post by cn90 »

Re Volvo 9140251...ebay has a few used master cylinders for sales FWIW.
2004 V70 2.5T 100K+
2005 XC90 2.5T 110K+

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Post by cn90 »

Master Cylinder is a critical item for obvious reasons: safety!

Eeuroparts lists 2 choices: with and without TRACS.
Your best bet is to call them, then ask them to open both boxes and email you the photos.
Find the photos that match your existing MC and order that one.
FTE (and ATE) is OEM mfg for the Master Cylinder.



S70-MC.jpg
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Post by erikv11 »

If you do a generic search in that part number, several of the hits and say "without TRACS" so maybe you are honing in on it. Keep us posted.

Sorry I wasn't paying attention earlier ... let me know if there is any use in me pulling the one on my parts car - 97 auto with TRACS.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k

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