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Discussion Starter #1
Been a long time since I've been on this forum. Moved, site changed passwords, etc. Anyway, has anybody had problems obtaining the brake master cylinder for an '03? Been replaced twice and I'm told it's an after market item. Now it seems as if the wrong one was installed the first time I had problems.
 

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Supporting SSR Hobbyist
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Been a long time since I've been on this forum. Moved, site changed passwords, etc. Anyway, has anybody had problems obtaining the brake master cylinder for an '03? Been replaced twice and I'm told it's an after market item. Now it seems as if the wrong one was installed the first time I had problems.
I talked to Mike Byers this morning and we cross-checked numbers.....

GM Part number 19209266
AC Delco part number 174-775

Good luck, bud.

Mike
 

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Genuinely SSR Obsessed
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Big John, great to hear from you even though you are having a recurring brake problem. We all miss you in Houston.

You have a PM. :smile2:


================
David :black:
 

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After receiving 2 brand new defective AC Delco Master Cylinders, the Tech installed a Wildwood for
LS Engines. I don't know the model, but it works great.
 

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Discussion Starter #5
I talked to gmpartsguy this morning and he came back with a GM # 18060788 Go figure.
 

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Discussion Starter #6
My tech is going to try another MC, but I'll keep the Wildwood suggestion in mind.
 

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Wilwood has several different sizes on their bores so I would call and talk to their tech guys. I have one on my Chevelle with 4 wheel disc brakes and it uses the 1 1/4 bore. I am running manual brakes on it which can make a difference also.
 

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Discussion Starter #10
Wound up ordering from Rockauto. OEM, new. Will let y'all know how it shakes out.
 

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Wilwood has several different sizes on their bores so I would call and talk to their tech guys. I have one on my Chevelle with 4 wheel disc brakes and it uses the 1 1/4 bore. I am running manual brakes on it which can make a difference also.
:smile2:

Interesting feedback.....It seems to me to be fairly (rare) for a car/truck with disc brakes on all four wheels to (NOT) be power assisted. Which is what I conclude from your "manual brake" comment.

The 1969 new Corvette that I purchased way back then, was a convertible with 300HP, Power steering, but the 4 wheel disc brakes were not. As I recall, it stopped as good as any thing could at the time. The lack of (power assist) was not even noticeable.:smile2:
 

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Mike and Karyn
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Dealers still have in stock

I talked to Mike Byers this morning and we cross-checked numbers.....

GM Part number 19209266 Discontinued
AC Delco part number 174-775

Good luck, bud.

Mike
DO NOT USE AC DELCO REBUILT....JUNK JUNK (NEW ONLY OEM)

Austin, TX) 188 1 3/13/2018 (512) 476-2401
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PIONEER CHEVROLET-OLDS-GEO INC
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Kool Chevrolet INC.
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COX CHEVROLET, INCORPORATED
(BRADENTON, FL) 946 1 3/12/2018 Cost - 15% (941) 739-3292

UNIVERSAL LIFT - MI (ACDELCO)
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DORMAN CADILLAC-GMC TRUCK, INC
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THE PARTS HOUSE (ACDELCO)
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Factory Motor Parts - National City
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CAL-STATE AUTO PARTS (ACDELCO)
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Factory Motor Parts- San Diego
(San Diego, CA) 1,164 2 3/13/2018 (858) 707-9222

FACTORY MOTOR PARTS - RIVERSIDE (ACDELCO)
(RIVERSIDE, CA) 1,167 1 3/13/2018 (951) 801-5383

DELCOLINE - STERLING (ACDELCO)
(STERLING, VA) 1,171 1 3/13/2018 (703) 661-8400

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(HYATTSVILLE, MD) 1,199 1 3/13/2018 (301) 864-4455

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:smile2:

Interesting feedback.....It seems to me to be fairly (rare) for a car/truck with disc brakes on all four wheels to (NOT) be power assisted. Which is what I conclude from your "manual brake" comment.

The 1969 new Corvette that I purchased way back then, was a convertible with 300HP, Power steering, but the 4 wheel disc brakes were not. As I recall, it stopped as good as any thing could at the time. The lack of (power assist) was not even noticeable.:smile2:
My Chevelle is what some would call a resto mod. It came from the factory with front disc 4 piston brakes and power brakes. I added the rears and took off the power booster. When I first started on it I had a 540 CI engine with a big solid roller cam shaft that would have had no vacuum, so that was why I pulled the booster off. All it did was get in the way of the valve covers. I have changed the engine and went with a milder 496 but that could change again. The current engine has a hydraulic roller cam shaft but still not making a lot of vacuum. Plus fabricated valve covers look better than a brake booster any day of the week on a big block Chevy
 

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2006 Automatic
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How about a power system powered by the power steering pump?

They were put on diesel cars back when and they really would stop the car!

I think they still make them.
 

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That’s a HydroBoost brake system. There are several available for the hot rod market. Wilwood is the most popular but also the most $.
 

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The Corvettes with non-power 4 wheel discs worked great, which proves the assist isn't needed if everything is sized right.
 

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Discussion Starter #17
The part I ordered from Rockauto was purported to be OEM and they only had 4 left. Should be here Monday. Been discussing the problem with my mechanic and he seems to think the problem I'm having with the brakes was prior to replacing the master cylinder (twice) and that the problem might not be with the master cylinder. We'll try te new one and see what happens.
 

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04 SSR
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Been discussing the problem with my mechanic and he seems to think the problem I'm having with the brakes was prior to replacing the master cylinder (twice) and that the problem might not be with the master cylinder. We'll try te new one and see what happens.
What problem were you having that lead to the master cylinder issue?
 

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Discussion Starter #19
Brakes would feel like they were partially locking up. The vehicle would slow much quicker than usual when I came off the gas. Then there was a distinct metal burning smell for a while and then the brake pedal would go to the floor with no braking action. Pumping brought it up some but it was a scary proposition. Didn't want to drive it too far that way so I took it to the closest repair facility - Meineke - not a good idea, but I didn't think the brakes were SSR specific. They changed out the master cylinder. Lasted about 80 miles and went out again. Took it back - changed out the master cylinder again. Lasted about 80 miles again and they went out. Took it to an independent mechanic - said they weren't bled properly. Lasted about the same amount of time. Took it back - first mechanic was fired - next one said that you needed a special machine to bleed the brakes - said he did it. Lasted about the same amount - this place went out business.

Spent some time sourcing a decent mechanic and I think I've found one. He's not sure it's the master cylinder, but, since the first two replacements were O'Reilly's rebuilds, I went to Rockauto and thought I was getting OEM ACDelco. Arrived today - dropped it off at the mechanic's and we'll see.

I haven't driven it very often over the last couple of years. Between weather and medical problems it sits quite a bit. Not garaged, but carported.

Any suggestions would be appreciated.
 

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Discussion Starter #20
New Master Cylinder Installed

Go the AC part from Rockauto - installed by my mechanic about two weeks ago. We decided just to see if that fixed the problem and, if not, we'll have to look further. Finally found this mechanic recently via a referral. He has a fairly large operation - dyno, builds racing engines and, from the looks of the trailer parked in front of the dyno shop it appears he knows what he's doing. Hopefully the problem was just defective cylinders from O'Reilly. Both previous times, the brakes started locking a bit and smelled for burning. Then no brakes at all without pumping. Will keep you updated.
 
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