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Thread: 6 Or 7 Bolt, Wide or Narrow

  1. #1

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    6 Or 7 Bolt, Wide or Narrow

    I have a June 92 Mighty Max with the 2.4.

    What are some ways I can difinitively tell if I have a 6 or 7 bolt wideblock or narrow block without taking the engine apart? I would use this chart:

    http://projectzerog.com/mitsubishi_engines.shtml

    But the problem is that my truck was built during the time period that they switched from the 6 to the 7.

  2. #2

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    Measure the block. I am 80% sure all the rwd mitsu's were wideblock. As for the crank, youll have to look at your flywheel.

  3. #3

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    if it's a 2.4 it is a wideblock. if you look at the firewall and if says G64B it's a 6 bolt. if it says 4G64 it's a 7 bolt. and yes the trucks did get the narrow blocks but only in the 2.0 motors.

  4. #4

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    I went and checked, and it turns out I have a 7. Thanks for the help!

  5. #5



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    Yup your truck is a wide block, all 2.4 truck motors are. As for the 6 vs 7 iM not sure, I know with dsm 2.0s(eclipses,etc) you can tell by looking at the oil pan/block but not sure with the 4g64
    Josh
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  6. #6

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    yes it is the same, if the firewall says 4G64 it will have the curved front oil pan and thinner rods. i've had to do a TON of 2.4 research hear lately because i too thought that i was getting a 6 bolt and it turned out to be a 7 bolt

  7. #7

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    actually with yours being a June truck you really need to do the oil pan check


    and if it is a 6 bolt, BOOST IT!!!

  8. #8

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    LOL.

    Looking at the oil pan I can for sure say that it is flat. I took it off last week to put a new gasket on it and it is definitely flat.

    I AM SO CONFUSED. GAH!

    Love my truck though. She will always be my baby.

  9. #9

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    I took some pics. Do these help at all?
    Click image for larger version. 

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  10. #10

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    man if it's flat then yes you have one of the older rarer 6 bolt 4G64's perfect for boost and a strong motor for sure

  11. #11

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    Awe hell yeah.

    I hate to be that guy, but if anyone in this thread wouldn't mind taking a look at another thread I posted, I am having some issues with the battery.

    http://www.mightyram50.net/vbulletin...sues-Questions

  12. #12

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    I was under the impression all '90, '91 and some '92s were wideblock 6 bolt 2.4 liter.

    There are a few rarer wideblock 6 bolt 2.0s that can with automatic transmissions.

  13. #13

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    Another easy trick to quickly tell if you have a 6 or 7 bolt is to look at the Head Bolts. Open the oil cap and look in the valve cover with a flashlight. If the head bolts are Allen Key head bolts, it's a 6 Bolt block. If they are 12 point 14mm (stretch bolts) it's a 7 bolt.

  14. #14

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    WOW!! he's totally right! i have a 2.0 6 bolt motor and and 7 bolt 2.4 right next to each other and yeah i had never noticed that!! awesome info for junk yard shopping!

  15. #15

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    I'm glad my over abundance of information that is totally useless to 99.8% of the world, was finally appreciated by somebody.

  16. #16



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    LOL RWD4G63, all information you give here is never worthless to us.

    Click image for larger version. 

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  17. #17

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    Excellent trick RWD4G63!!!

    I just went and checked My d/d, 4g64 build date 12/92, = '93.

    yuppers, 12 point !, thx added!!

  18. #18

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    I am glad this thread has opened up so much. I really appreciate all the help on this one. However, even with all the help, I still have no idea as to what engine I have.

    What I do know:
    1. The oil pan is flat
    2. The firewall says 4G64
    3. Here is a pic from the inside of my valve cover. They look like regular bolts, but I can't tell.
    Click image for larger version. 

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    I guess I'm gonna have to bite the bullet and check the flywheel so I will know once and for all. Can anyone send me to some instructions on how to get to the flywheel?
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  19. #19



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  20. #20

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    Those are the factory 1gen Allen head bolts, Congrats!! You have a 6 bolt!!

  21. #21

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    Quote Originally Posted by thehive View Post
    Those are the factory 1gen Allen head bolts,
    indeed... 3 yellow lines for reference.

    Quote Originally Posted by thehive
    Congrats!! You have a 6 bolt!!
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  22. #22



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    Quote Originally Posted by thehive View Post
    Those are the factory 1gen Allen head bolts, Congrats!! You have a 6 bolt!!
    My first gen did not have hex bolts just cap screwes.
    Members come and members go, But the board keeps track of them.
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  23. #23



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    he is refering to the 1st gen or series 2.4, not 1st gen truck like ours...
    Pennyman1
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  24. #24



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    Flat oil pan and Allen head bolts all leads to 6bolt. Ignore the g64 4g64 firewall plate info, never even heard of that before.
    Josh
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  25. #25

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    Yeah sorry, that was me. Some bad info I came across over on project zero g. The Allen/ 12 point head bolt info is golden thou!!

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