98 Master cylinder problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Fastmatt · 08-16-2004, 02:22 PM

Hey guys, name is Matt. Long time listener, first time caller.

I have a 98 GMC 1500 vortec V6. Driving the truck yesterday for the first time in ages as my wife is usually the sole driver. I noticed the brakes felt kinda soft, and they progressively got worse throughout the day. I check the wheel cylinders and calipers and they look ok, but the M/C was wet on the bottom side. I also noticed the resevoir (sp?) felt loose, and when you wiggle the resevoir, you can see around the front seal where it mount to the M/C dampness. is there anyway to tighten this? what would cause it to all of a sudden become loose? am I looking at a new M/C ?? thanks for any input.

Matt

99-2door · 08-17-2004, 04:26 AM

IF the master cylinder is leaking it needs to be replaced.

Fastmatt · 08-17-2004, 10:07 AM

After I had the wheels off and all checked out, it seems to have brakes again. Odd thing is I didn't do anything but look. I'm keeping a close eye on the master.

08-16-2004, 02:22 PM	#1
Fastmatt Registered User Join Date: Apr 2004 Location: Abbotsford, BC, Canada Posts: 3	98 Master cylinder problems Hey guys, name is Matt. Long time listener, first time caller. I have a 98 GMC 1500 vortec V6. Driving the truck yesterday for the first time in ages as my wife is usually the sole driver. I noticed the brakes felt kinda soft, and they progressively got worse throughout the day. I check the wheel cylinders and calipers and they look ok, but the M/C was wet on the bottom side. I also noticed the resevoir (sp?) felt loose, and when you wiggle the resevoir, you can see around the front seal where it mount to the M/C dampness. is there anyway to tighten this? what would cause it to all of a sudden become loose? am I looking at a new M/C ?? thanks for any input. Matt

08-17-2004, 04:26 AM	#2
99-2door Registered User Join Date: Oct 2003 Location: Broken Bow, OK Posts: 1,385	IF the master cylinder is leaking it needs to be replaced. __________________ 95 K3500 SRW 5.7L Vortec 4L80e 4.10 G80 2001 GMC C3 6.0 AWD, Volant, 3/5 drop TBSS intake, HP tuners, pullies, 05 efans, 05 front brakes, etc. 2003 Tahoe Z71 Silverado front clip

08-17-2004, 10:07 AM	#3
Fastmatt Registered User Join Date: Apr 2004 Location: Abbotsford, BC, Canada Posts: 3	After I had the wheels off and all checked out, it seems to have brakes again. Odd thing is I didn't do anything but look. I'm keeping a close eye on the master.



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