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Am I crazy?

belize1334

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Joined
Nov 18, 2003
Messages
3,316
Location
Bozeman, MT
Or is this a 6-bolt G4CS with the letters 4G64 stamped on it? My understanding is that there is no such thing as a 6-bolt 4g64. But I've been through the bottom of this thing. It's a 6-bolt. It has a 86.5mm bore, and it's not a wide block 'cause it has the same transmission pattern as my 2.0. The picture is a bit hard to make out 'cause the surface corrosion has just about wiped the letters clean off but I'm fairly certain it reads 4G64. What do you think?

 

EMX5636

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Jun 28, 2008
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1,631
Location
Bucks County, PA
You can get a 4G64 in a 6 bolt. A lot of them are the G4CS like you mentioned, but you can find them in some Mitsu's. I had 2 of them.
 

belize1334

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Nov 18, 2003
Messages
3,316
Location
Bozeman, MT
I was under the impression that the 4g64 stamp implied a wideblock. Now I'm reading through the ProjectZeroG stuff and it looks like the 91/92 Expo vans had a narrow block 4g64 6-bolt. click I guess I'll have to stop flaming people who talk about building a 4g64.

But for piece of mind, If the 4 transmission holes that I use to attach this block to my engine stand are the same pattern as the 2.0 that came off the the engine stand, then it's a narrow block right? If it were a wide block I'd have had to adjust the bracket to match the different pattern(?).
 

tektic

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Dec 19, 2012
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1,497
Location
ronkonkoma, ny
4g64 stamp implied a 6mm higher deck height. That's it.

Your stock trans would not bolt up if it was a wide block.

12.5 inches = Narrow, 13.25 inches = Wide

Not sure what bracket your talking about, but I don't think its that simple.
 
Last edited:

belize1334

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Joined
Nov 18, 2003
Messages
3,316
Location
Bozeman, MT
^^ Sorry, yeah that was confusing. I didn't actually bolt my trans up to it. But, in order to mount the motor on a stand you have to arrange the stand so that the 4 "arms" each attach to the 4 bolt holes that are normally used to attach the transmission. So, once that's done, the engine stand becomes a jig for how the transmission attaches. Since the stand was set up for my 2.0, and attached to the 2.4 w/o adjustment, I assume that this is a narrow block. And given the numbers you just mentioned, this is definitely narrow. ~12.5" between the bottom two transmission bolts.

I agree that 2.4 means 6mm taller, but it is also usually associated w/ 7-bolts whereas G4CS is usually associated with 6-bolts.
 
Last edited:

362Ryan

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Joined
Aug 9, 2013
Messages
116
Location
Alaska
I have a 6 bolt 4G64 going into my car when it comes back from the machine shop.
 

dsmless

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Joined
Jun 12, 2008
Messages
224
Location
tucson,az
You can use your spacer/starter shim plate that goes in between the engine block and transmission as a go-no go gauge. If all the 4 mounting holes line up with the block....then congrats, you found a narrow block 4g64
 
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