flushing brake system Q's - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*Fast68Chevy* · 11-15-2002, 01:37 PM

ok am replacing master cylinder on a 1 ton dually truck for a guy and want to see what fluid type you guys would use to kinda flush out bleed system, I assume DOT 4 would be good enough for 10,000 GVW 1 ton dually with hydroboost

thanks for anything

Longhorn Man · 11-15-2002, 02:09 PM

Everything you'll ever need to know about brake fluid.
Everyone should book mark it, real good reading.
http://www.shotimes.com/SHO3brakefluid.html

Bill72BB · 11-15-2002, 02:30 PM

Addy . Good stuff as always.
I was thinking about putting Dot 5 in BB glad I read that article.

jmil1974 · 11-15-2002, 04:39 PM

I used cheap (Autozone Brand) Dot 3 stuff to flush my system and when I thought it was almost done -- switched to Valvoline Sythetic Dot3/4 to fill. Seems to have worked out nicely.

*Fast68Chevy* · 11-15-2002, 04:50 PM

around here we have no access to anything cept for what A/Z and NAPA have, guess really have no choice in this case, new cheap fluid has to be better than old cheap fluid thats in the system now... probably as old as the truck is im sure,

thanks

Long Knight · 11-15-2002, 05:33 PM

Don't mean to change the subject but this could be relevento to Fast68Chevy's fluid choice.

Is it a good idea to mix reg. fluid with synthetics?

Bill72BB · 11-15-2002, 05:37 PM

LONG:
Check the site Andy posted above ,it indicates you should not mix them.

67 CHEV MAN · 11-15-2002, 05:41 PM

Thanks alot, Ive just been using the cheap stuff. Now i know better...

Longhorn Man · 11-15-2002, 05:42 PM

Something else also... While it has been a few months since I read that page (I'll see if I can do it this evening when i have a little more time) I want to add this if it is not in there.
It seems that when you go from non-synthetic to synthetic, there is a very good chance in all your seals going bad in th following months.
When I first went into the Army in '93, we were just starting the chainge over to synthetic. Every single caliper and drum brake cylinder went bad within 4 months.
Just an observation...may not be fact, but an observation.

11-15-2002, 01:37 PM	#1
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	flushing brake system Q's ok am replacing master cylinder on a 1 ton dually truck for a guy and want to see what fluid type you guys would use to kinda flush out bleed system, I assume DOT 4 would be good enough for 10,000 GVW 1 ton dually with hydroboost thanks for anything

11-15-2002, 02:30 PM	#3
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,979	Addy . Good stuff as always. I was thinking about putting Dot 5 in BB glad I read that article. __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

11-15-2002, 04:39 PM	#4
jmil1974 Ain't we cute? Join Date: May 2002 Location: Friendswood, TX Posts: 700	I used cheap (Autozone Brand) Dot 3 stuff to flush my system and when I thought it was almost done -- switched to Valvoline Sythetic Dot3/4 to fill. Seems to have worked out nicely. __________________ 69 C10 2WD LWB Fleet 350/350 power front disc conversion (6 lug disc kit from gmcpauls) and new engine, PS, A/C, fresh fluids, SHE DRIVES! FOR SALE $3900

11-15-2002, 05:33 PM	#6
Long Knight Spank 'em if you got 'em! Join Date: Nov 2002 Location: Kansas City Posts: 628	Don't mean to change the subject but this could be relevento to Fast68Chevy's fluid choice. Is it a good idea to mix reg. fluid with synthetics? __________________ Long Knight '71 C-20, 350ci, TH350, Edl. 1406 Carb w/elec.choke, Ignitor ignition, Viper Tires, Orange Dipstick

11-15-2002, 05:37 PM	#7
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,979	LONG: Check the site Andy posted above ,it indicates you should not mix them. __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

11-15-2002, 02:09 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Everything you'll ever need to know about brake fluid. Everyone should book mark it, real good reading. http://www.shotimes.com/SHO3brakefluid.html

11-15-2002, 04:50 PM	#5
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	around here we have no access to anything cept for what A/Z and NAPA have, guess really have no choice in this case, new cheap fluid has to be better than old cheap fluid thats in the system now... probably as old as the truck is im sure, thanks

11-15-2002, 05:41 PM	#8
67 CHEV MAN Registered User Join Date: Feb 2001 Location: Northern Oklahoma Posts: 276	Thanks alot, Ive just been using the cheap stuff. Now i know better... __________________ 71 Cheyenne Swb 400/400 drivetrain. My EBAY Auctions

11-15-2002, 05:42 PM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Something else also... While it has been a few months since I read that page (I'll see if I can do it this evening when i have a little more time) I want to add this if it is not in there. It seems that when you go from non-synthetic to synthetic, there is a very good chance in all your seals going bad in th following months. When I first went into the Army in '93, we were just starting the chainge over to synthetic. Every single caliper and drum brake cylinder went bad within 4 months. Just an observation...may not be fact, but an observation.

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