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Aluminum 4g63 block???

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g4ebguy90

10+ Year Contributor
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Mar 9, 2011
Rockford, Illinois
Hi, I came across on my travels, someone who was willing to sell me a aluminum 4g63 block with only 30,000 miles on it. Kind of weird, I have never seen anything like it. Light as a feather to. Whats the history with this?
 
I'd be less interested in the 4G63 stamp on it, and more interested in things like bore, stroke, deck height, rod length, and various weights. Keep in mind that Mitsubishi used the term "4g63" on engines other than what came in our DSMs. There were DOHC and SOHC variations in 19 different vehicles.

And although I've never known any variations to be aluminum, it's still worth noting that "4G63" doesn't imply it's a DSM block.
 
Well I was just curious, which is why I made a thread. I didn't expect tons of people to comment on it.
I'm just as curious as anyone else. Still waiting for a pic from the guy.

If it's the real deal I will be sure to snag as many pics as possible.
 
Well as far as the variation don't usually the blocks have a number stamped under the 4g63? I will be sure to get that to if it will help.

But besides that

4- Number of cyls
G- What kind of fuel
6- Engine family
3-Refers to engine itself

I would assume if it has a 4g63 stamp its, a 2.0L dohc/sohc engine.

All variants of the 4g63 have a 85mm bore and a 88mm stroke.

Unless its some weird as heck japanese stuff.

wasnt the SOHC called the 4g62?

None the less the blocks should be the same, just the heads different right>
 
Getting pic now!

Hmmmmmmm!!!!
 

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CONFIRMATION ON 4g63! I guess it does look diff then a regular block.???
 

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If it's aluminium it's not a 4G63, the "G" stands for cast iron block, it would have to be a 4A63 for aluminium, of which mitsubishi has not produced. Maybe a 4A9 series engine, which as far as I know only come in 1.3 and 1.5...

Sure a billet version of the 4G63 is possible, but it's still not a 4G, just a copy..
 
What are you guys nuts, I rip these engines apart daily and sell the blocks and internals, I know how much they weigh.

This engine above you, I could literally hold in my one hand all day long.

The first time I picked it up, I really got into it, until i relized it weighed close to nothing at all.

IN fact the same day I lifted that engine, I bought 2 bare blocks, a 7 and a 6 they were at least 3-4 times heavier, and even had help getting it into my car.

FYI, a block with no internals weighs between 85-125 lbs. That engine probaly weighed 30-40 as pictured.
 
If it's aluminium it's not a 4G63, the "G" stands for cast iron block, it would have to be a 4A63 for aluminium, of which mitsubishi has not produced. Maybe a 4A9 series engine, which as far as I know only come in 1.3 and 1.5...

Sure a billet version of the 4G63 is possible, but it's still not a 4G, just a copy..

The G stands for Gas
 
G/D was the fuel (Gas or Diesel)
The newer engines with the A designation was because they had Alloy Cylinder Heads
Not sure about B Maybe both because I know the 4b11t has an aluminum head and block
 
The pics kind of suck. If the block is aluminum, it'd have to have cylinder liners/sleeves. Look for those. If it has them, then sure, its an aluminum block. If not, then its definitely cast iron.
 
See thats the weird thing, I know the pics suck... But, if I remember right there were no liners, but the engine was so light, it had to be aluminum.

Maybe the guy has a half done project idk.. This is why im sharing it. But I'm to scared to buy it now.
 
I'd say its safe to assume its cast iron then. W/o liners, aluminum can't withstand the extreme conditions of the combustion chambers. It's either cast iron, or he's got some one-off aluminum block that will crack or bust a hole through the cylinder walls when he first tries to open up the throttle. Either way, not worth a couple hundred.

Can't explain why it was so light, maybe it was a different block you picked up? No clue..
 
Can't be cast iron. No way it's paint, I mean it had that metal look. No rust at all. not even a hint. If it were painted, they usually got that weird glossy type color. Usually find imperfections.

Not on that block.

I know aluminum blocks use liners, i thought that was odd it didn't have any.

Eventually when I go to pick up a girdle I forgot in his garage, I will snap some HD pics with my camcorder, then post them. I'm curious.
 
How is it, that you guys know its cast iron from them pics? I mean seriously.
 
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