Results 1 to 11 of 11

Thread: Issues after head replacement.

  1. #1

    Array
    Status
    Offline
    Join Date
    12-29-2020
    Posts
    6
    Location

    Grants pass OR
    Vehicle

    1988 Mitsubishi Mighty Max
    Engine

    G63B

    Issues after head replacement.

    I have a 1988 mighty max G63b 2.0. I recently purchased it & started having idle issues. It went on to being coolant in The oil so I pulled the head hoping only the head gasket was cracked but found that the head had 2 cracks where cyl #4 is. I purchased a remanufactured head(with jet valves as my old head had.) & new felpro head gasket. After assembly & having all timing marks ligned up, (little notch on head right under valve cover, crank, & balance shaft.) distributor aligned with notch on gear pointing to #1 cyl, it would backfire out carb some & try to start up but not fully.

    after looking back at the cam I noticed when having tdc the #1 intake valve is very tight & the exhaust is loose on the rocker, idk what that is about but I’ve been reading they both should be loose for them to be closed can someone verify this for me?

  2. #2

    Array
    Status
    Offline
    Join Date
    12-29-2020
    Posts
    6
    Location

    Grants pass OR
    Vehicle

    1988 Mitsubishi Mighty Max
    Engine

    G63B
    Also oil smells of gas pretty badly

  3. #3

    Array
    Status
    Offline
    Join Date
    12-29-2020
    Posts
    6
    Location

    Grants pass OR
    Vehicle

    1988 Mitsubishi Mighty Max
    Engine

    G63B
    When checking valve clearance it is TDC without a doubt. & my intake valve doesnt have any play to it & wont even let a feeler gauge past it. It’s supposedly a remanufactured head from allied motor parts.

  4. #4



    Array
    Status
    Offline
    Join Date
    03-16-2011
    Posts
    3,803
    Location

    Sacramento, CA
    Vehicle

    1979 Dodge D-50
    Engine

    Chevy V6
    If it’s got hydraulic adjusters. It might not be seated correctly.
    Members come and members go, But the board keeps track of them.
    Find me on FaceBook
    clicking HERE.

    Or look on YouTube Click Here.
    http://mobilemillwright.com

  5. #5

    Array
    Status
    Offline
    Join Date
    06-15-2014
    Posts
    6,059
    Location

    Adelaide, South Australia
    Vehicle

    1985 Mitsubishi L200
    Engine

    G63B
    ^+1 on checking the hydraulic adjusters. Then check distributor installation. It sounds like the distributor may not be in the correct location and/or firing order is out. Easy enough mistake to make.
    support the forum that supports you - join and donate to MightyRam50.Net today! donations unlock the edit function

  6. #6

    Array
    Status
    Offline
    Join Date
    12-29-2020
    Posts
    6
    Location

    Grants pass OR
    Vehicle

    1988 Mitsubishi Mighty Max
    Engine

    G63B
    How would I go seating it the correct way?

  7. #7

    Array
    Status
    Offline
    Join Date
    06-12-2015
    Posts
    185
    Location

    Owensboro, KY
    Vehicle

    1991 Dodge Ram 50
    Engine

    4D56-T
    Does your engine still have the factory mechanical fuel pump? Oil smelling like gas suggests that the fuel pump may have failed and started dumping gas into the crankcase

  8. #8


    Array
    Status
    Offline
    Join Date
    05-01-2018
    Posts
    1,414
    Location

    Kailua, HI
    Vehicle

    1986 Dodge Power Ram 50
    Engine

    G54B
    Idle issues & smell of gas ~ might also be carburetor flooding ? Might be carburetor float out of adjustment or needle seat not closing properly?

    You should change the engine oil & oil filter sooner than later...

    Have Fun Fixing

  9. #9

    Array
    Status
    Offline
    Join Date
    12-29-2020
    Posts
    6
    Location

    Grants pass OR
    Vehicle

    1988 Mitsubishi Mighty Max
    Engine

    G63B
    Well after a bit of tinkering with the rocker assembly & hydraulic lifters I got it to fire with switching a few out to other valves, Ran for about 5 seconds then quit. I am running the mechanical pump so I’m assuming it’s not pressurizing or flooding? Possibly carb issues maybe? I’m running a 38/38 Weber so I should go ahead & swap to the electric in-line fuel pump?

  10. #10

    Array
    Status
    Offline
    Join Date
    12-29-2020
    Posts
    6
    Location

    Grants pass OR
    Vehicle

    1988 Mitsubishi Mighty Max
    Engine

    G63B
    Got oil & filter changed also��

  11. #11

    Array
    Status
    Offline
    Join Date
    06-15-2014
    Posts
    6,059
    Location

    Adelaide, South Australia
    Vehicle

    1985 Mitsubishi L200
    Engine

    G63B
    Yeah, the Weber needs a HVLP fuel feed. It's either killed the pump, or it's overpowering the needle and seat and flooding it.
    support the forum that supports you - join and donate to MightyRam50.Net today! donations unlock the edit function

Tags for this Thread

Bookmarks

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
  •