2G VS 1G Easy Head id?

[forcefed86]

Looking at a questionable engine for sale locally. It’s a 6 bolt block and crank, owner claims it’s a 2G head. Previous owner said the head was starved of oil. It has a 1g Intake on it. Is there an easy way for me to tell if this is in fact a 2 g head? I thinking this guy doesn’t have a clue and it’s a 1g head. And this engine had other issues.

Thanks

 

[turbosax2]

Look at the front of the head by the timing belt. You should see a 2" long "plate" in the casting above the #1 and #2 exhaust ports. On that "plate" there will be a drill mark. If it's on the right hand side of the plate it's a 1g head. If its on the left hand side and there is a nipple in the middle of the "plate" you have a 2g head. See pic below for reference.

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[bkrathwohl]

I did not know this, it would have helped me out a few months ago. Definitely a good thing to know.

 

[Killian]

+1 on the tricks that save time and money

 

[lucuc0212]

Savin money is the name of the game with dsms

 

[95burgundyesi]

Also, a very easy way to tell a DSM 7 bolt/6bolt head apart are the intake port sizes.

 

[ProjectTalon92]

Gonna throw a wrench in this thread. I have a cylinder head that by the markings is a 1G head. I have a cylinder head that I know 100% is from a 6 Bolt 1992 engine. When I compare the two next to each other, the castings are identical, but the numbers on the side are a little different. Does anyone know what the difference might be between these two cylinder heads? Picture 2 and 3 are the 1G heads.

Now comes the strange question... The head on the bottom in the first picture, and the cylinder head in the last picture, has the same size exhaust ports as the 1G head, but different numbers on the side, and minor differences in the castings. Also, the "drill" marks on the front mentioned previously in this thread are different on this head. Can anyone identify this head? Thanks for you time.

 

[Bud92gsx]

Your pictures don't work dude..

 

[BogusSVO]

I have a mix of 1g and 2g heads for a total of 8 heads... I am going to go look and do the "turbosax2" Id method

I do know that the them housing mounts are diffrent on the heads.. Ill take pics and post.

 

[ProjectTalon92]

Pictures fixed.

 

[miguelmcv]

If the head is on, Intake and exhaust manifolds are bolt on.

The easy way to know with out taking a part is,

Look at the Manifold Bolts. The Bolts that are at the end of each side of the Manifold.

The 1g uses the same size of bolts all around the exhaust manifold, which the 2g head uses 2 Bigger Bolts, one on each end of the Manifold.

Just check if all the Nuts at the manifold are the same size, If they are the same size, then is a 1g, if the nuts are not the same size all around, then is a 2g Head.

I hope this helps.

 

[1990AWD]

It looks like a 2g head, if you look at the vertical lines above the oil gallery, the 2g ones are flat and wide and the 1g lines are skinny.

 

[ProjectTalon92]

Good input. Can any 2G guys confirm what 1990AWD is saying? Also I really like your signature 1990AWD. Not many people know about the GSR4 badges.

After 1990AWD post and, the pictures from earlier in the thread I see it could be a 2G head. But what about the markings on the front with the drill marks and the numbers on the side?

 

[19Eclipse90]

If the head is on, Intake and exhaust manifolds are bolt on.

The easy way to know with out taking a part is,

Look at the Manifold Bolts. The Bolts that are at the end of each side of the Manifold.

The 1g uses the same size of bolts all around the exhaust manifold, which the 2g head uses 2 Bigger Bolts, one on each end of the Manifold.

Just check if all the Nuts at the manifold are the same size, If they are the same size, then is a 1g, if the nuts are not the same size all around, then is a 2g Head.

I hope this helps.

That's a 6-bolt to 7-bolt difference, not a 1G vs. 2G.

I vote 1G-esque head. I have a very similar head on my '96 with 6-bolt swap. I don't believe this head was originally on a 1G car.

http://www.dsmtuners.com/forums/newbie-forum/404339-how-distinguish-7-bolt-head-6-bolt-non-turbo-head-6-bolt-turbo-head.html#post152604685

 

[Josh2g]

The last picture is from a Hyundai, they called their version of the 4g63 a G64C or something along those lines All of their versions of the 4g63 were 6 bolt engines.

 

[1990AWD]

Also I really like your signature 1990AWD. Not many people know about the GSR4 badges.

They're not just badges. My car is from Japan.

 

[ProjectTalon92]

19Eclipse90, not to say your wrong or argue, but the 7-Bolt engine I know came in the 1G cars for a few years, but I consider it a 2G engine. So either 2G or 7-Bolt I agree with you. But my question is, does the 93 7-Bolt head have the smaller ports like a 2G head? Or is it more similar to a 92 6-Bolt head? Also, what say you about Josh2g's comments? Do you believe it could be a 6-Bolt Hyundai head?

Josh2g, I honestly thought it could be a Hyundai head. So you're saying that the "4G63" in the Hyundais' were 6-Bolt engines? they never made a 7-Bolt? and after a closer look at it, it looks more like a N/A head do to the fact that it has no banjo bolt at the end of the oil galley. Also, casting is a little different compared to a 1992 6-Bolt head I have laying on top of it in picture #1.

1990AWD, either way it's nice. I've thought about buying the badges for my 92 Eclipse GSX, but it's not a GSR-4 and I'm not trying to fool anyone. I could always get them and find somewhere to put them.

 

[19Eclipse90]

19Eclipse90, not to say your wrong or argue, but the 7-Bolt engine I know came in the 1G cars for a few years, but I consider it a 2G engine. So either 2G or 7-Bolt I agree with you. But my question is, does the 93 7-Bolt head have the smaller ports like a 2G head? Or is it more similar to a 92 6-Bolt head? Also, what say you about Josh2g's comments? Do you believe it could be a 6-Bolt Hyundai head?

It happens quite often, the 1G or 2G thing instead of 6-bolt or 7-bolt. It's better to state it accurately, otherwise you have misinformation floating around from people who just glance over things. Not lecturing or preaching or anything, just stating where I'm coming from. On a related note, all 1G heads have the large intake ports.

I think Josh2g's comments have some merit; I haven't messed with Hyundais at all so I know very little about them aside from sometimes having interchangeable parts with our cars. As I said before, I know it didn't originally come on 1Gs. I also had stated before that I was almost completely certain it had 1G sized intake ports (when I looked 3 years ago), but I find a lot of things searching the internet that sometimes suggest otherwise. Here's some information I found earlier:

‪4g63 head comparison‬‏ - YouTube

Hyundai 4G63/G4CP Head Swap
big port 4g63 heads - 4GTuner

 

[ProjectTalon92]

I've seen that video before.It doesn't really show much other then the ports, I'm a little more interested in the markings and casting differences. I have decided I'm not using that cylinder head, but I wanted to kinda clear the air between all the confusion. I plan on just having one of the two 1G heads I have refreshed and using it. I'd like to keep this thread going, but you should check out my recent post.

 

[honda_burner]

can anyone finalize any of this information? i bought a 95 tsi which i thought originally had a 6 bolt swap but then i looked at the oil pan and realized its a 7 bolt. then i looked at the intake manifold and its a 1g intake mani and i had a 1g exhaust manifold on it so i think i might have a 1g head... im still trying to figure out what the heck kind of mutant engine i have! i really hope i have the 1g head swap because i read they flow alot better due to the bigger intake ports but i dont really want to pull the intake off just to tell what head i have. thanks in advance

also i forgot to say i have the intake mounted map sensor but its not mounted to the intake due to the 1g manifold... everythings a mess in that bay and just when i think i have it figured out something else says otherwise. i should have pictures of my engine bay in my profile if you want to check it out.

 

[Bud92gsx]

They're not just badges. My car is from Japan.

Your car is from Illinois Mike..I thought I have told you this before..

 

[dalesmitsu]

Boostedfilms.com has a good video. About dsm comparison very informative, check it out if you havent yet.

 

[1990AWD]

Your car is from Illinois Mike..I thought I have told you this before..

Yes, it was built there, but it was sold and operated in Japan!!

 

[jimbob_843]

Why not check for a cam sensor behind the intake cam gear? You see one there BOOM 2g head, if not then its a 1g head and will have black or green top sensor opposite side.