Swapping to 1G head, any needed hardware?

[sleepy98gsx]

I just replaced the headgasket on my 7 bolt and now i drove it for about 15 miles and took the exhuast manifold back off because it was still smoking, just not nearly as bad, but it gave the same smell.

With that said, the exhaust runners were caked with fresh oil, and we got to looking around and my valve seals need replaced, but i have a 1G head/intake manifold that was just rebuilt and i figure why pay someone to replace my seals on a 114k head when i have a new one that performs better.

With this swap what changes will i need to make? i have a new Cometic metal headgasket coming and i also have new ARP headstuds here tomorow. i know i'll need to swap the distributor and such, but any other changes i will need to make, please let me know. Thanks guys.

Chris

 

[GSTac]

Hope this helps some.

http://www.roadraceengineering.com/1g2gheadswaptechtip.htm

 

[sleepy98gsx]

would a Cometic headgasket work for this? that link said use a factory mitsu or an HKS, but i've heard of people using the Cometic.

Chris

 

[mirkoelek]

It looks like a lot of work

 

[GSTac]

would a Cometic headgasket work for this? that link said use a factory mitsu or an HKS, but i've heard of people using the Cometic.

Chris

I'm sure a cometic would be fine. This article maybe some what dated and the popularity of the cometic hadn't come around yet.

 

[sleepy98gsx]

it does seem like a lot of work..but it has to be do-able..i can't afford to have someone do the valve seals but i have a 1G head laying around that is brand new and it's a performance gain anyways from my 2g head..i don't really need to buy anything except the gasket which i'm not going to do unless i can actually accomplish this task on my own, does anyone have experience with this swap? i just really need my car back on the road and don't have a lot of money, i work at an auto parts store so i got ARP studs coming for cheap and the head gasket is cheap and i can time it myself so i should be alright as far as i know, until i started looking at that link and now it seems a little more complicated..please give me tips if you have any, Thanks!

Chris

 

[mirkoelek]

it does seem like a lot of work..but it has to be do-able..i can't afford to have someone do the valve seals but i have a 1G head laying around that is brand new and it's a performance gain anyways from my 2g head..i don't really need to buy anything except the gasket which i'm not going to do unless i can actually accomplish this task on my own, does anyone have experience with this swap? i just really need my car back on the road and don't have a lot of money, i work at an auto parts store so i got ARP studs coming for cheap and the head gasket is cheap and i can time it myself so i should be alright as far as i know, until i started looking at that link and now it seems a little more complicated..please give me tips if you have any, Thanks!

Chris

How much for 2g ARP's and gasket....I've got a similar problem

 

[staticbrainwash]

You could look at any of the dsm vendor sites to find out how much arp's and a head gasket would be.

But for those unwilling to research.

http://www.slowboyracing.com/shop.php?sid=&cat=43

http://www.slowboyracing.com/more.php?id=1144&

 

[LessIsMore]

I've done this swap on a 95-96 ecu car with great sucess. Timing belt jumped many a teeth and broke valves off in #4 cylinder.

I had a spare 1g head and used a 1g cas for cam signal only. Crank sensor still used to provide crank signal. I was able to avoid the random misfire code this way.


You will need a 1g intake manifold, coil pack, throttle body, some water lines and perferably a 1g cas though you could use your stock cas. You can also use 1g cams, there supposed to be an upgrade. Use the lifters which are in your 2g head assuming there the revised style. (I got a 1g cas, harness and cams I'll let go for cheap). 1g intake manifolds go for next to nothing.

The swap really isn't all that hard, if you've done a 2g head swap you should have no problems making a 1g head work on a 2g block. Since you have 97-99 ecu car the swap will be easier since there is no need to mess with the spark and injector sequence. Let me know if you have any questions, this is all fresh in my head since I've done this about three months ago.

-Nate

 

[sleepy98gsx]

the good news about getting the parts from a 1g is that i have a 91 that's sitting in my garage right next to my 98 so as far as any extra 1g parts, i have them all so as far as the manifold, throttle body, coil pack, etc. it's all there..

i got the arp's for $115 and the cometic i ordered from slowboy for $95, so it's a $200 project that's hopefully gonna up my numbers a tiny bit vs. paying for new valve seals and labor which i would think would cost me more than $200. and it could take longer because no garage around here is just going to pull my car in over night and have my car done by the end of the weekend. i plan on doing this project over the next 5 days so hopefully all goes well.

Chris

 

[Splitpi]

Good Luck, please keep us updated on how it goes with any issues, words of wisdom and plenty of pictures...

 

[sleepy98gsx]

i will definately keep you updated, and please keep your eyes open in case i have any questions that you might be able to help me with. I will try to get my girlfriend's digital camera to take some pictures. I just talked to Slowboy on the phone and they said it's a simple task to do and it shouldn't take too much work since i have the entire 1g to pull parts from.

mirkoelek--on the note of the ARP studs..they said to make sure to use the 1g studs so i had to send em back and order the other set, and they came up about 10 dollars cheaper than the 2g studs did..i wasn't sure if you were considering a swap too or just replacing the gasket but either way there ya go..

Chris

 

[mirkoelek]

i will definately keep you updated, and please keep your eyes open in case i have any questions that you might be able to help me with. I will try to get my girlfriend's digital camera to take some pictures. I just talked to Slowboy on the phone and they said it's a simple task to do and it shouldn't take too much work since i have the entire 1g to pull parts from.

mirkoelek--on the note of the ARP studs..they said to make sure to use the 1g studs so i had to send em back and order the other set, and they came up about 10 dollars cheaper than the 2g studs did..i wasn't sure if you were considering a swap too or just replacing the gasket but either way there ya go..

Chris

You still have 2g block, arent 1g studs bigger...

 

[LessIsMore]

6 bolt studs/bolts have a larger diameter

7 bolt studs/bolts are the same diameter regardless of 1st gen or 2nd gen.

 

[halik008]

Just an FYI 2g heads flow more then 1g heads......so technically stock to stock you are actually loosing "performance"

 

[dsmsucks]

Just an FYI 2g heads flow more then 1g heads......so technically stock to stock you are actually loosing "performance"

WHAT???
Unported the 1g head flows better than the 2g head

 

[siceclipse]

We're not going over this AGAIN, and i this thread.

Heads work well because of FLOW not VOLUME.

 

[dsmsucks]

We're not going over this AGAIN, and i this thread.

Heads work well because of FLOW not VOLUME.

For shits lets just say I switched to a 2g tb, intake manifold and head I would gain more flow over my 1g stuff
If so I guess I thought wrong

 

[daren_p]

mirkoelek--on the note of the ARP studs..they said to make sure to use the 1g studs so i had to send em back and order the other set, and they came up about 10 dollars cheaper than the 2g studs did..i wasn't sure if you were considering a swap too or just replacing the gasket but either way there ya go..

Chris

So if you are supposed to use the 6 bolt studs while putting a 6 bolt head on a 7bolt block, what do they normally do, dill & tap the block for the larger diameter studs?

 

[sleepy98gsx]

So if you are supposed to use the 6 bolt studs while putting a 6 bolt head on a 7bolt block, what do they normally do, dill & tap the block for the larger diameter studs?

i work at an auto parts store that carries ARP and the catalog only shows two listings, the first being after '94 and the second being before '94, and when i called Slowboy, they said just to use the 1g ARP studs and i'll be fine.

 

[daren_p]

i work at an auto parts store that carries ARP and the catalog only shows two listings, the first being after '94 and the second being before '94, and when i called Slowboy, they said just to use the 1g ARP studs and i'll be fine.

Yes you are correct there are only two different listings because there are only 2 different studs, one size for 6 bolt and one size for 7 bolt motors. The 6 bolt studs have a 1mm larger diameter vs the 7 bolt, that is why the 6 bolt studs won't screw into your 7 bolt block. This is why I was asking if they normally just drill/tapp the 7bolt block to fit the larger diameter studs, since that is what they told you to run. I guess they didn't mention about the block having to me modded to accomidate the larger diameter 6 bolt studs?

6 bolt is M12 while 7 bolt is M11, actually there should be 4 listings. You can get both the 6 bolt or 7 bolt in either reg studs with 12 point nuts or under cut studs with 12 point nuts.

 

[siceclipse]

i usually just hear about people sliping the head right over the studs and torqing the caps down.

 

[daren_p]

i usually just hear about people sliping the head right over the studs and torqing the caps down.

You are thinking about the opposite, when people install a 2g head on a 6 bolt block.

 

[sleepy98gsx]

hey guys i just wanted to let you know that i decided to put another 2g head on her. My friend had a head with 65k on it sittin in his garage so he sold it to me fore a few bucks so i figured that would save me a lot of hassle and i can just throw that Cometic gasket with the 2g ARP's and it'll all fit together nicely.

Just wanted to say Thanks for all the help!

Chris