Results 1 to 3 of 3

Thread: DOHC Head Info

  1. #1
    Forum User Not Verified Feedback Score 0 GordonRamsey's Avatar
    Join Date
    Sep 2010
    Owner Since

    Location
    Earth
    Posts
    240
    Thanks
    2
    Thanked 1 Time in 1 Post

    DOHC Head Info

    Today I learned a little bit on resurfacing heads and what not. And one of the things I learned was that most overhead cam engines, if bowed up (yes, bowed, not blowed (up)), the cam will stop spinning because the head is warped. And the only way to fix this is to put it in an oven and rebend it. Now I see the need for this, and don't find fault in it. (If there is in the case of our heads, please tell me.)

    Now, another thing. I was told that the with most foreign aluminum heads you can only resurface up to .0010 (10 thousandths if I typed it wrong), and after that you will need a "head saver shim" for between the head and block so the valves don't hit the piston obviously. What is the limit of resurfacing for the 6G72 heads?
    “What's the use of a fine house if you haven't got a tolerable planet to put it on?”

  2. #2
    Forum User Feedback Score 3 (100%) toddrs93's Avatar
    Join Date
    Sep 2010
    Owner Since
    1997

    Location
    Hagerstown,MD
    Posts
    185
    Thanks
    0
    Thanked 3 Times in 3 Posts
    Quote Originally Posted by GordonRamsey View Post
    Today I learned a little bit on resurfacing heads and what not. And one of the things I learned was that most overhead cam engines, if bowed up (yes, bowed, not blowed (up)), the cam will stop spinning because the head is warped. And the only way to fix this is to put it in an oven and rebend it. Now I see the need for this, and don't find fault in it. (If there is in the case of our heads, please tell me.)

    Now, another thing. I was told that the with most foreign aluminum heads you can only resurface up to .0010 (10 thousandths if I typed it wrong), and after that you will need a "head saver shim" for between the head and block so the valves don't hit the piston obviously. What is the limit of resurfacing for the 6G72 heads?
    I'm not sure off hand on the limit because I have a machine shop that does that but, if the heads have been done before or are warped badly in some cases it is also possible to get a thicker headgasket to compensate and create a little more space.

  3. #3
    Forum User verified Feedback Score 4 (100%)
    Join Date
    Sep 2010
    Owner Since

    Location
    Warner Robins, GA
    Posts
    726
    Thanks
    5
    Thanked 132 Times in 83 Posts
    Quote Originally Posted by GordonRamsey View Post
    Today I learned a little bit on resurfacing heads and what not. And one of the things I learned was that most overhead cam engines, if bowed up (yes, bowed, not blowed (up)), the cam will stop spinning because the head is warped. And the only way to fix this is to put it in an oven and rebend it. Now I see the need for this, and don't find fault in it. (If there is in the case of our heads, please tell me.)

    Now, another thing. I was told that the with most foreign aluminum heads you can only resurface up to .0010 (10 thousandths if I typed it wrong), and after that you will need a "head saver shim" for between the head and block so the valves don't hit the piston obviously. What is the limit of resurfacing for the 6G72 heads?
    .012" according to Mitsubishi.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
3000GT / Stealth / GTO Resources
3000GT / Stealth / GTO / Multi-site Classifieds
3000GT/Stealth/GTO Event Pages
3S National Gathering
East Coast Gathering
Upper Mid-West Gathering
Blue Ridge Gathering
3000GT/Stealth/GTO Clubs and Groups
Michigan 3S
MInnesota 3S
Wisconsin 3S
Iowa, Nebraska, Kansas 3S
North California 3000GT/Stealth
United Society of 3S Owners
3000GT/Stealth/GTO Forums
3000GT/Stealth International
3000GT/Stealth/GTO Information and Resources
Team 3S
3000GT / Stealth / GTO Information
daveblack.net
The 3000GT/Stealth/GTO Web History Project
3000gt.com
3000GT / Stealth International WWWboard Archive