GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 6 of 6

Thread: Donut Gasket

  1. #1
    Jr. Mechanic 95Chevyk1500's Avatar
    Join Date
    Dec 2009
    Location
    Maine (so yes, I can ride a moose)
    Posts
    100

    Default Donut Gasket

    anyone ever done a donut gasket? my truck has a tbi 350 and i'm not lookin forward to this project. it'll be nice though b/c i'll be able to hear the flowmaster rather than a rattly exhaust leak
    1997 Chevy c1500
    Regular cab Shortbox
    4.3 Automatic (wish it was a 5 speed, but i'll get over it)
    157k miles

  2. #2

    Default

    in maine i would probly hit them with pb blaster for a couple nights before bed that way you only break half of the manifold studs but after that they just sit inside the lip of exh. man. then you put the pipe back up and tighten the three nuts per side

    99 tahoe 2 dr. 4x4 7.4 4L80-e NP246, SAS, dana 60 hp, sterling 10.5 rear, gibson headers, and alot of tricks of the trade !!!!!!IF YOU'RE NOT CHEATING YOUR NOT TRYING!!!!!!!!

  3. #3
    Master Mechanic daddytech's Avatar
    Join Date
    Mar 2008
    Location
    Portland TN
    Posts
    672

    Default

    yeah don't make the same mistake i did... the lip goes inside the manifold not in the pipe. replaced them both on my wife's 98 Suburban and even with brand new donut gaskets in them there was still exhaust leaks and it sounded all throaty and weak. once the new gaskets were installed properly and everything tightened up the right way it's a completely different truck. nice and quiet and a lot more powerful. of course the E3 plugs helped out a lot that way too.

  4. #4

    Default

    Quote Originally Posted by azdrtdog View Post
    in maine i would probly hit them with pb blaster for a couple nights before bed that way you only break half of the manifold studs but after that they just sit inside the lip of exh. man. then you put the pipe back up and tighten the three nuts per side

    I agree with azdrtdog, when I replaced mine I followed this method and no issues.

    '96 K1500, 5.7
    6" RCD
    35" Toyo M/T On 16" Black Raceline Raptors
    4.56 Yukon Gears w/ TruTrac Rear
    S&B CAI
    Dual Flowmaster 40's
    Camo Wet Okoles
    Line-X Bedliner
    De-Badged


    NW BlackDiamond Edition

  5. #5
    Jr. Mechanic 95Chevyk1500's Avatar
    Join Date
    Dec 2009
    Location
    Maine (so yes, I can ride a moose)
    Posts
    100

    Default

    thanks guys. This aint gunna be fun, its been friggen cold haha

  6. #6
    Sr. Engineer ahm1127's Avatar
    Join Date
    Jan 2009
    Location
    Pennsylvania, United States
    Posts
    320

    Default

    Thanks for the info, hopefully completing this week. new gaskets every where!
    Everyday I wake up is a great day! ;-)
    05' Chevy Suburban, 11' Ford Fiesta

Similar Threads

  1. Oil Pan Gasket
    By Mean_Green_95 in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 3
    Last: 03-08-2010, 10:22 AM
  2. Flange/Donut Gasket replacement
    By campuscop2003 in forum General Chevy & GM Tech Questions
    Replies: 1
    Last: 09-17-2009, 06:52 PM
  3. oil pan gasket-what is the tube slip gasket over
    By phoebeisis in forum General Chevy & GM Tech Questions
    Replies: 3
    Last: 07-12-2009, 08:31 PM
  4. gasket
    By Mmarrocco in forum GM Powertrain
    Replies: 3
    Last: 06-21-2008, 02:58 PM
  5. Forgot to put in Y-pipe donut
    By MD4x4 Fireman in forum General Chevy & GM Tech Questions
    Replies: 5
    Last: 02-03-2008, 12:12 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •