![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Registered User
Join Date: Aug 2014
Location: United States
Posts: 21
|
Master Cylinder Keeps Blowing Rear Seal
Alright I have a reoccurring mystery that I can't seem to solve. I have replaced my master cylinder twice once was a remanufactured napa unit and the other was a brand new napa unit. The remanufactured one replaced the "original" unit that also blew a rear seal but lasted somewhat longer. Before I get into detail here is how long each lasted:
"Original": Unknown number of miles Reman: 1 Night New Napa Unit: 400 Miles I have replaced everything in the brake system including: wheel cylinders, calipers, most of the lines, pads, shoes, etc... everything except the vacuum booster. Keep in mind this truck originally had a hydro-boost system from the factory(in 1974). The new unit blew right after I got my 454's compression back up with a intake/exhaust valve tweak and carb float adjustment(she runs real good now!). I'm at a complete loss why this truck hates the vacuum boost system so much that it keeps blowing master cylinders. Any advice or ideas? |
![]() |
![]() |
![]() |
#2 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
|
Re: Master Cylinder Keeps Blowing Rear Seal
Quote:
So far so good but it's only been in place for a short period. I found it weird though that multiple units failed similarly.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
|
![]() |
![]() |
![]() |
Bookmarks |
Tags |
blown seal, brakes, master cylinder |
|
|