Resolved Which head do I have?

[GSX_beast]

Hey guys, sorry for asking another question that has been asked a million times, but I can't seem to find a straight answer. What are the ways of telling which head I have. I know the block is from a 96 gst from the VIN on it. I can say for sure that the head is the original one. The turbo and IM are both on there so looking at the ports really isn't an option. I bought it a long time ago and I'm trying to put all the pieces together. Thanks.

 

[92AWDHX40]

Post a pic.

 

[renovatdkitchen]

Check the exhaust manifold stud holes. If they are all the same size, it's a 6 bolt head. If the two on either end of the exhaust ports are slightly larger than those stud holes in the middle, it's a 7 bolt.


Sorry, unless you're looking to see if its the original 7 bolt head or not not if it's a 6 or a 7 bolt?

If so, disregard what I said.

 

[97gsxIA]

Besides the outer exhaust mani. studs you can also use these 3 clues as reference:

The thermostat housings use different bolt patterns: the 1G in a triangular shape (three fasteners) and the 2G in a more rectangular shape (four fasteners). See pic 1 below for a visual: 2G on top, 1G on bottom. A second, easy identifier of a 2G head vs. a 1G head is the location of the hole on the exhaust side of the head, seen here: 2G VS 1G Easy Head id?. Third, a 2G head is differentiated from a 1G head because of the size of its intake runners. See pic 2 below: the top head is a 2G, the bottom is a 1G. Finally, 2G heads normally have a code "G6S" or "G6K" on the thermostat side where the 1G heads will have "2.0" (also pictured in pic 1 below) or simply "G6" with some numbers underneath it.

 

[19Eclipse90]

Besides the outer exhaust mani. studs you can also use these 3 clues as reference:

The thermostat housings use different bolt patterns: the 1G in a triangular shape (three fasteners) and the 2G in a more rectangular shape (four fasteners). See pic 1 below for a visual: 2G on top, 1G on bottom. A second, easy identifier of a 2G head vs. a 1G head is the location of the hole on the exhaust side of the head, seen here: 2G VS 1G Easy Head id?. Third, a 2G head is differentiated from a 1G head because of the size of its intake runners. See pic 2 below: the top head is a 2G, the bottom is a 1G. Finally, 2G heads normally have a code "G6S" or "G6K" on the thermostat side where the 1G heads will have "2.0" (also pictured in pic 1 below) or simply "G6" with some numbers underneath it.

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

 

[GSX_beast]

So I'm 99% sure it's a 1g head from what you guys are saying.

So my next question is whats the difference between the 1g and 2g water pipes and why do I need to use the 1g one?

It's one step forward two steps back with this car. And thanks for answering the other question so fast.

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[19Eclipse90]

Looks like you're right on the 1G head.

The difference between a 1G and 2G water pipe is simple: the 1G unit connects directly from the lower radiator hose to the water pump whereas a 2G unit runs from the 2G thermostat housing to the water pump. Their geometry is different; the 1G pipe curves downward on the inlet and the 2G curves up.

You must use the 1G water pipe with a 1G head because the 2G thermostat housing does not bolt up to the 1G head.

 

[Joethefallen23]

The 2g water pipe returns into the thermo housing. The 1g pipe just connects directly with the lower rad hose.

 

[GSX_beast]

Ok, cool. I have the 1g pipe installed already, one less headache.

 

[97gsxIA]

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

I was waiting for you to see that