New Problem, Leaky MC Lid, Need Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Stocker** · 05-18-2018, 06:11 PM

Have had a rash of problems lately with the K20. Yesterday the front MC reservoir started leaking fluid around the lid and I can't figure out why. It's not overfilled, and it's never leaked before. MC is just a few years old. I wire brushed the inside of the lid and replaced the (rubber?) seal but no help. That's the reservoir for the rear brakes. The shoes and wheel cylinders were new a year or two ago.

I'm a bit frustrated here, been dealing with other issues too, and I have no clue why brake fluid is leaking around the lid. Any ideas? Thanks, guys.

demian5 · 05-18-2018, 06:28 PM

Yeah that sucks. I have a brand new one that has done that since new. Eventually the front reservoir was empty.

68panelman · 05-19-2018, 08:20 AM

Had this problem also once. I had to bend the metal bars out, to give more down force on the lid. It worked well for me.

05-18-2018, 06:11 PM	#1
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,497	New Problem, Leaky MC Lid, Need Help Have had a rash of problems lately with the K20. Yesterday the front MC reservoir started leaking fluid around the lid and I can't figure out why. It's not overfilled, and it's never leaked before. MC is just a few years old. I wire brushed the inside of the lid and replaced the (rubber?) seal but no help. That's the reservoir for the rear brakes. The shoes and wheel cylinders were new a year or two ago. I'm a bit frustrated here, been dealing with other issues too, and I have no clue why brake fluid is leaking around the lid. Any ideas? Thanks, guys. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

05-18-2018, 06:28 PM	#2
demian5 Registered User Join Date: Aug 2016 Location: Lake Forest, CA Posts: 2,177	Re: New Problem, Leaky MC Lid, Need Help Yeah that sucks. I have a brand new one that has done that since new. Eventually the front reservoir was empty. __________________ "Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC

05-19-2018, 08:20 AM	#3
68panelman Registered User Join Date: Jan 2011 Location: Delaware and Long Island, New York Posts: 3,450	Re: New Problem, Leaky MC Lid, Need Help Had this problem also once. I had to bend the metal bars out, to give more down force on the lid. It worked well for me.



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