I bought a 1g head, how can I tell if it's a 6 bolt or not? - DSM Forums: Mitsubishi Eclipse, Plymouth Laser, and Eagle Talon Forum: DSMtalk.com
 
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Old 12-05-2006, 09:29 AM   #1
maximuspaynimus
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I bought a 1g head, how can I tell if it's a 6 bolt or not?

Exactly what the title says. I bought a 1g head a while back, and that was back when I never thought to ask if it was a 6 or 7 bolt. It supposedly came off of a 1993 tsi awd manual trans. I havent been able to find anywhere how to tell the difference...
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Old 12-05-2006, 10:06 AM   #2
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

Quote:
Originally Posted by maximuspaynimus
Exactly what the title says. I bought a 1g head a while back, and that was back when I never thought to ask if it was a 6 or 7 bolt. It supposedly came off of a 1993 tsi awd manual trans. I havent been able to find anywhere how to tell the difference...

If it came off of 93 then it *most likely* is a head off of a 7 bolt block.
Why do you care anyways?
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Old 12-05-2006, 10:30 AM   #3
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

I dont really care. But I was thinking of sometime down the road doing a 6 bolt swap after I blow this 7 bolt I have. It has 97k on it.
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Old 12-05-2006, 10:36 AM   #4
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

any pre 95 head say 89-94 dsm 2.0L heads are all the same unless its a turbo or non- turbo. then the only diffrence is the cams
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Old 12-05-2006, 10:41 AM   #5
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

Quote:
Originally Posted by Turboeagletalon
any pre 95 head say 89-94 dsm 2.0L heads are all the same unless its a turbo or non- turbo. then the only diffrence is the cams
Right, and the only differance with the cams is between the A/t models and the M/T. It actually has nothing to do with turbo or not.
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Old 12-05-2006, 11:26 AM   #6
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

The only thing that you have to worry about is what the guys said above. If it is a AT head, then you dont want it if you have a MT car. So other then that, dont worry about it being 6 or 7 bolt.
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Old 12-05-2006, 11:44 AM   #7
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

I thought there was a difference in the head studs between 6 and 7-bolts?
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Old 12-05-2006, 12:06 PM   #8
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

There is... 6 Bolt motors have larger head studs. So If you cant easily fit a 6 bolt head stud through one of the holes, then you know what block the head came off of.
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Old 12-05-2006, 12:14 PM   #9
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

So what do you do if you want to put a 7-bolt 1G head on a 6-bolt motor? Drill it? And vice-versa, if you want to put a 6-bolt head on a 7-bolt 1G motor doesn't the smaller size of the studs give problems?
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Old 12-05-2006, 12:53 PM   #10
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

To put a 7 bolt head on a 6 bolt block, the correct way is to drill it. Some people say it is ok to just push the studs through the head but honestly I dont want little metal shavings floating in my oil from the stud having to push through the metal. Its not about what you can get away with, its about doing it the right way the first time.

To put a 6 bolt head on a 7 bolt block is different. The block has dowl pins that hold the head in place, so using the smaller head studs doesnt hurt anything.
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Old 12-05-2006, 01:39 PM   #11
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

You guys are confused with 1g to 2g stuff. All 1g's have the same exact head, and the head bolt holes are the same also.
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Old 12-05-2006, 03:05 PM   #12
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

Quote:
Originally Posted by 1gawd4g63
You guys are confused with 1g to 2g stuff. All 1g's have the same exact head, and the head bolt holes are the same also.
No, 1g 6-bolt heads have 12mm headstuds, while 7-bolts have 11mm headstuds.
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Old 12-05-2006, 04:19 PM   #13
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

All 1g's (except 1.8's) use the same head, it doesn't matter whether its a non-turbo, turbo, 6 bolt or 7 bolt, all have identical heads. The cams are the only difference.

2g's use the redesigned head with smaller head studs.

Do a search if you don't believe me. Even look at various vendors pages, ever notice how when they sell heads they will only ask if its a 1g or a 2g.
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Old 12-05-2006, 07:18 PM   #14
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

Wow. I thought this shit was common knowlege.

As far as cylinder head port sizes and how the head flows, 90-94 4G63 NA, and 90-94 turbo are IDENTICAL. The difference between 6 bolt and 1g 7bolt heads are the headstud sizes, 12mm on the 6 bolt and 11mm on the 7bolt. The 7 bolt head can be drilled over 1mm in those holes to accomodate the 6 bolt studs/bolts.

NA 4G63 heads have different valvetrain parts including cams and valvesprings. So if you use one of those, make sure when it is assembled it is assembled with turbo valvetrain. As far as the different cam profiles between the auto and the manual tranny, I doubt that it's noticable with regular bolt ons, but who gives a fuck anyhow, just swap out the cams.
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Old 12-05-2006, 07:27 PM   #15
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Re: I bought a 1g head, how can I tell if it's a 6 bolt or not?

Thank you for helping stop the spread of bad information. I can't believe someone can have over 300 posts and not know common things such as this.
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