6 Or 7 Bolt, Wide or Narrow

[Slagathor]

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.

[sleeps]

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.

[thehive]

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.

[Slagathor]

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

[DroppedMitsu]

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

[thehive]

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

[thehive]

actually with yours being a June truck you really need to do the oil pan check
http://i1172.photobucket.com/albums/r568/thehive201/Mobile%20Uploads/oilpans_compare-03_zpsf8fcf239.jpg (http://s1172.photobucket.com/user/thehive201/media/Mobile%20Uploads/oilpans_compare-03_zpsf8fcf239.jpg.html)

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

[Slagathor]

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.

[Slagathor]

I took some pics. Do these help at all?
1198911990

[thehive]

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

[Slagathor]

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/showthread.php/4081-Battery-Issues-Questions

[noahwins]

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.

[RWD4G63]

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.

[thehive]

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!

[RWD4G63]

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

[BradMph]

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

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[claych]

Excellent trick RWD4G63!!!

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

yuppers, 12 point !, thx added!!

[Slagathor]

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.
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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?

[camoit]

Have you looked in the WIKI?

http://www.mightyram50.net/vbulletin/showwiki.php?title=Engine:Engine+type+and+markings

[thehive]

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

[claych]

Those are the factory 1gen Allen head bolts,

indeed... 3 yellow lines for reference.


Congrats!! You have a 6 bolt!!

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[camoit]

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.

[pennyman1]

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

[DroppedMitsu]

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

[thehive]

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!!

[Slagathor]

Awe shit yeah!!! Yall just made my day. Today is turing into a really great day.

[Slagathor]

I also want to take a moment to thank everyone on here for all the help. You guys are awesome. I'll be sticking around on this site for a while.

[BradMph]

Donations are welcomed if you feel that information here is worth a donation, lol.
12038

Doesn't require too much either, Maybe $10 or up to $25. Whatever is comfortable. Plus you can get Forum vinyl sticker for your window on truck too. You also get a Donator plaque posted below your name in the forum.

There are large and smaller forum stickers, I think they are better explained in the donation area on forum.

Just a thought, no teeth pulling here.