Brake Fluid - ZR-1 Net Registry Forums

secondchance · 08-15-2009

When I had local Midas flush the brake system on my 84 Z51 after 6 years of use, about a week later master cylinder went bad.
I know fluid in my 94 is at least 9 years (most likely older since I bought the car in 2000).
Need your consensus. Should I go ahead and have it flushed? Or take the attitude "if it ain't broke don't fix it"?

08-15-2009

Fluid needs to be changed. It holds water. Your 84 doesn't have an ABS module. The Z does.

secondchance · 08-15-2009

Quote:

Originally Posted by Jeffvette

Fluid needs to be changed. It holds water. Your 84 doesn't have an ABS module. The Z does.

Alright. I guess I will take it to my mechanic next week. I hope the master cylinder survives this...

Aurora40 · 08-15-2009

I doubt fresh fluid is hard on the master cylinder. Perhaps it was the way in which they changed it?

secondchance · 08-16-2009

Quote:

Originally Posted by Aurora40

I doubt fresh fluid is hard on the master cylinder. Perhaps it was the way in which they changed it?

I think it was pressure fed and each bleeder opened until clear fluid came out.
At least that is what I recall.

lbszr · 08-17-2009

Quote:

Originally Posted by secondchance

I think it was pressure fed and each bleeder opened until clear fluid came out.
At least that is what I recall.

If there was corrosion in the MC bore and they pushed the pedal to the floor past normal travel it can wipe the seals out pretty quick, but wouldn't think they would of done that with the press. method unless they compressed the calipers and reseated them later.

But then maybe it needed replaced anyway.

batchman · 08-18-2009

Make sure to read the FSM for the correct bleed process.

For both our 88 Z51 and the 91 ZR-1 the order is non-intuitive at RF, RR, LR, LF. When the new M/C went in and still the pedal was mush we finally looked and saw that. It made a big difference.

Good luck,
- Jeff

08-15-2009	#1
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,723	Brake Fluid When I had local Midas flush the brake system on my 84 Z51 after 6 years of use, about a week later master cylinder went bad. I know fluid in my 94 is at least 9 years (most likely older since I bought the car in 2000). Need your consensus. Should I go ahead and have it flushed? Or take the attitude "if it ain't broke don't fix it"?

08-15-2009	#2
Jeffvette Guest Posts: n/a	Re: Brake Fluid Fluid needs to be changed. It holds water. Your 84 doesn't have an ABS module. The Z does.

08-15-2009	#4
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Re: Brake Fluid I doubt fresh fluid is hard on the master cylinder. Perhaps it was the way in which they changed it? __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img]

08-18-2009	#7
batchman Join Date: Jun 2009 Location: I live at Devens, one run at a time Posts: 455	Re: Brake Fluid Make sure to read the FSM for the correct bleed process. For both our 88 Z51 and the 91 ZR-1 the order is non-intuitive at RF, RR, LR, LF. When the new M/C went in and still the pedal was mush we finally looked and saw that. It made a big difference. Good luck, - Jeff __________________ [I]91 ZR-1 #1840, autocrossing in SCCA BSP. FIC S/S's DRM chip/Watson/Borla/lid/LW batt&headlights, springs, shocks, pads & lines, quick rack & Turn One, camber brace, 32/22mm sways, A/C halfway deleted 17x11 & 12 CCW's, 315 & 335 Hoosier A6s [/I]