Go Back  Offshoreonly.com > Technical > General Q & A
454 cracked heads please help! >

454 cracked heads please help!

Notices

454 cracked heads please help!

Old 03-31-2013, 06:33 PM
  #1  
Registered
Thread Starter
 
Join Date: Mar 2013
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Default 454 cracked heads please help!

Ok here is the run down. I bought a 89 24' Mach 1 with a 454(only 80 hrs!) last year. Before i got a chance to take it out my father managed to put 3 cracks in the heads. I pulled the covers and seen that it has gold rockers bolted on it and all the components look basically new. The cam is a bigger cam but i do not have the specs on it. My problem is that i can not seem to find th rectangle port heads bare. I came across a set of 781 heads that has 2.065 Int and 1.720 exh valves installed. Can i use these and just bolt my rocker arms and springs on this? i know the best is a valve job but im just looking to get the motor functional so i can enjoy some time on the water. Also the heads have new valve seals & guide plates.
Mhines7086 is offline  
Old 03-31-2013, 07:09 PM
  #2  
Charter Member #927
Charter Member
 
Payton's Avatar
 
Join Date: Jan 2001
Location: IN
Posts: 4,834
Received 2 Likes on 2 Posts
Default

How did your dad manage to crack the heads? Was it run to hot? You may want to check a few more things like rings and cylinder walls.
Payton is offline  
Old 03-31-2013, 08:26 PM
  #3  
Registered
iTrader: (5)
 
Join Date: Jul 2009
Location: Taunton Ma
Posts: 8,527
Received 698 Likes on 341 Posts
Default

is it a mark 4 or gen 5/6 ? Many sets of heads for sale on here.
Unlimited jd is offline  
Old 03-31-2013, 10:14 PM
  #4  
Fast Singles Club
Gold Member
iTrader: (8)
 
the deep's Avatar
 
Join Date: Oct 2011
Location: Raystown Lake , Pa.
Posts: 3,958
Received 361 Likes on 149 Posts
Default

Sure , blame it on the old man .
the deep is offline  
Old 03-31-2013, 10:14 PM
  #5  
Registered
iTrader: (2)
 
Join Date: Aug 2005
Location: Between A Womans Leggs in IL
Posts: 6,306
Likes: 0
Received 1 Like on 1 Post
Default fixx

Originally Posted by Mhines7086
Ok here is the run down. I bought a 89 24' Mach 1 with a 454(only 80 hrs!) last year. Before i got a chance to take it out my father managed to put 3 cracks in the heads. I pulled the covers and seen that it has gold rockers bolted on it and all the components look basically new. The cam is a bigger cam but i do not have the specs on it. My problem is that i can not seem to find th rectangle port heads bare. I came across a set of 781 heads that has 2.065 Int and 1.720 exh valves installed. Can i use these and just bolt my rocker arms and springs on this? i know the best is a valve job but im just looking to get the motor functional so i can enjoy some time on the water. Also the heads have new valve seals & guide plates.
1) either you bought it this way and it froze b4 you bought it or 2) if he over heated it to put 3 cracks in the heads then you have more problems then you think..
FIXX is offline  
Old 03-31-2013, 10:16 PM
  #6  
Fast Singles Club
Gold Member
iTrader: (8)
 
the deep's Avatar
 
Join Date: Oct 2011
Location: Raystown Lake , Pa.
Posts: 3,958
Received 361 Likes on 149 Posts
Default

Originally Posted by FIXX
1) either you bought it this way and it froze b4 you bought it or 2) if he over heated it to put 3 cracks in the heads then you have more problems then you think..
Exactly
the deep is offline  
Old 04-01-2013, 02:42 AM
  #7  
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha/LOTO
Posts: 19,482
Received 1,737 Likes on 857 Posts
Default

Originally Posted by fixx
1) either you bought it this way and it froze b4 you bought it or 2) if he over heated it to put 3 cracks in the heads then you have more problems then you think..
x3
Griff is offline  

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.