The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-17-2015, 03:36 PM   #1
72hoopti
Registered User
 
Join Date: Sep 2009
Location: Redwood City, CA
Posts: 24
ZZ4 Head Gasket

Gentlemen-I have blown my SECOND head gasket in my zz4. Does anyone have access to instructions to replace head gaskets for the zz4? The motor has 38k on it and Im not paying another 1500 bucks to have it replaced.
72hoopti is offline   Reply With Quote
Old 07-17-2015, 04:38 PM   #2
leftybass209
Registered User
 
leftybass209's Avatar
 
Join Date: Feb 2011
Location: Modesto, CA
Posts: 2,188
Re: ZZ4 Head Gasket

The procedure isn't special for a zz4 as opposed to any other sbc. A quality head gasket and proper torque sequence should take care of it. Its good practice to replace both gaskets together as well because different thicknesses change the compression slightly as well.

Do you know why you've been blowing head gaskets?
leftybass209 is offline   Reply With Quote
Old 07-17-2015, 08:38 PM   #3
WIDESIDE72
Senior Member
 
WIDESIDE72's Avatar
 
Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,500
Re: ZZ4 Head Gasket

I would check the head (s) with a straight edge to be sure that they aren't warped. Due to your previous trouble I would take the heads and have them resurfaced. They can do this without taking the heads apart, and the cost should be minimal. Even if the surface is true, it might be too slick to get a good seal. What gasket did you use previously? Fel Pro makes an MLS gasket that's hard to beat.
WIDESIDE72 is offline   Reply With Quote
Old 07-17-2015, 08:40 PM   #4
67 chevelle
Registered User
 
67 chevelle's Avatar
 
Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
Re: ZZ4 Head Gasket

arp studs are probably a good idea also
__________________
68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs
67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive
58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white
69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive
67 chevelle is offline   Reply With Quote
Old 07-17-2015, 09:24 PM   #5
WIDESIDE72
Senior Member
 
WIDESIDE72's Avatar
 
Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,500
Re: ZZ4 Head Gasket

Quote:
Originally Posted by 67 chevelle View Post
arp studs are probably a good idea also
To each his own, but seems like overkill on a non boosted engine. Keep in mind that studs may make in truck head removal difficult if not impossible. I know they do on a big block in a first gen camaro!
WIDESIDE72 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:46 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com