beam514's 99 Galant: 3.5L Swap

**jimmy_o2** · 07-18-2009, 12:47 AM

have u asked tj or bj

**beam514** · 07-18-2009, 02:32 PM

I posted it on MP earlier this morning. BJ's TB only had one vacuum actuator IIRC.

anyway plugging everything back in and I ran in to one problem:
Back in SPD_FRK's thread I posted that both the IAC and TPS plugs on the Diamante TB were the same as those on the 6G72.. well I was wrong haha I guess the IAC was similar in shape, however it's different. Here are some pics:

6G72

Diamante

Lucky for me, the engine came with almost the complete harness hacked off (I guess they didn't want to unplug everything.. Also came with the alternator, AC, and power steering brackets. Guess I struck it rich haha). This is the Diamante plug connection.

6G72 plug connection connected to the harness

So I'm going to need to cut off the 6G72 plug connector and solder on the one from the Diamante. Just need to figure out the pins

blue8g · 07-18-2009, 08:52 PM

do work son!

**M-Rod** · 07-18-2009, 11:52 PM

I believe the 74 had slight differences over years and they went through a minor change (as far as the plenum and throttle body are concerned) in 2000 or so. Mine doesn't have the fitting you have circled in blue.

**wright06jhs** · 07-19-2009, 01:40 AM

Originally Posted by M-Rod

I believe the 74 had slight differences over years and they went through a minor change (as far as the plenum and throttle body are concerned) in 2000 or so. Mine doesn't have the fitting you have circled in blue.

Im thinking the years they started changing a few things was 2002.

**Jeffylou87** · 07-19-2009, 05:52 PM

You should make a How To thread about doing this swap.. List of parts, where to get them, how much.. etc. It should be made a sticky if you do because there are plenty of people out there who have tons of questions about this swap..

**M-Rod** · 07-19-2009, 07:06 PM

Originally Posted by Jeffylou87

You should make a How To thread about doing this swap.. List of parts, where to get them, how much.. etc. It should be made a sticky if you do because there are plenty of people out there who have tons of questions about this swap..

There really isn't much more involved than swapping in another 6g72. Depending on the year of the donor motor there is very little modification.

**beam514** · 07-19-2009, 07:23 PM

Jeffylou, Matt is totally correct. the 74 is essentially the same. I was surprised at how similar it is actually. Luckily, mine came with the alternator and powersteering brackets (You need those from the 74)

For anyone wanting to do the swap that doesn't get the powersteering bracket, I may be selling mine as I deleted the PS

There is however a tutorial on club3g that I referenced quite a bit. Read the whole thing and all the little details. It really helps. Also helps to have a Haynes Manual (essentially it walks you through the steps of removing an engine)
Right here: http://www.club3g.com/forum/performa...74-engine.html

If you want me to start up a 3.5L swap thread though, I will do so

Hell, I just turned 18 in may, and the extent of my automotive experience was lowering my car back in December 2008. Prior to that, not much car knowledge. I did a hell of a lot of reading and re-reading though

**Way Fast Galant** · 07-19-2009, 07:53 PM

for your first swap, i think you did a hell of a great job. makes me want an 8g to do that swap, lol.

**beam514** · 07-19-2009, 08:03 PM

thanks man :)

and so my plan was to have the car running by saturday.. which was yesterday. Ran into some problems though. One of them was the IAC plug which i previously stated. Also, I'm using the stock intake tubing up until the MAF for now. Had to hack off the little water catch box near the bend at the TB as it wouldn't fit b/c it was hitting the brake fluid reservoir. Also I was planning on putting the battery on the shelf where the old air filter box used to be, but the damn filter I bought is HUGE and the stock intake piping angles it right to that shelf.. and there is not enough room for the battery tray in the old position. Need to maybe get a smaller battery or something (getting a new battery anyway) and slim down the stock tray

**M-Rod** · 07-19-2009, 08:17 PM

Have you considered relocating the battery to the trunk? It's planned for my swap. I think it would be a great way to make room and clean up the engine bay at the same time. Just a possible suggestion. But you are doing great so far, keep it up. I can't wait to see this thing run!

**beam514** · 07-19-2009, 08:18 PM

Yea I was thinking about that. I need to look up how to do a battery relocation though. I would have to drill into the firewall for the new wires correct? (that kind of scares me)... but I guess I have come this far haha

**M-Rod** · 07-19-2009, 08:38 PM

Either that, or else you could run wires through your inner fender with your harness that goes to the dash.

Found this picture that Fred posted long ago, but you will see which wires I'm talking about. You can still access these with only the inner fender removed.

**wright06jhs** · 07-20-2009, 12:38 AM

A battery re-location will look great. I'm also thinking of doing in in my stratus because of the up coming 74 swap. The picture M-rod posted is the way i'm going to be routing my wires, very good place to run them.

**beam514** · 07-20-2009, 02:23 AM

I guess I could get this?
http://www.summitracing.com/parts/SUM-G1200A/
Once I run it through the fender and in through the dash, I guess I have to run it under the carpet and then somehow in to the trunk? Some guys appear to be running it on the side of the frame rails.. which doesn't seem like the brightest idea to me for some reason

**wright06jhs** · 07-20-2009, 02:53 PM

Originally Posted by beam514

I guess I could get this?
http://www.summitracing.com/parts/SUM-G1200A/
Once I run it through the fender and in through the dash, I guess I have to run it under the carpet and then somehow in to the trunk? Some guys appear to be running it on the side of the frame rails.. which doesn't seem like the brightest idea to me for some reason

I would get that one, and yes you can pull the door sills up and pull the carpet back and run the wire along the floor under the carpet. Just make sure you make sure its not going to be anywhere in harms way like near seat bolt down points, under the trunk release, running under any sharp edges. It will be just like running amp wiring for a sub woofer but more important lol :D

**beam514** · 07-24-2009, 12:24 AM

Okay so I had my brother go buy a Braille battery at a performance shop near his house. I Guess I'll have to fab up some kind of custom battery tray b/c the stock one doesn't fit as it hits the 6G74's distributor. Also, there's no room on the little driverside shelf. So I will be getting that tonight, and finishing up my ghetto-intake, and then it should be good to go

Also, does NO ONE have any thoughts on the extra vacuum actuator? and the extra fitting on the back of the plenum?

**beam514** · 07-25-2009, 05:35 PM

okay the car is running!!! using a Braille battery on the modified OEM battery tray. Car sounds REALLY good. Kinda hard to turn with no power steering, but I'll get used to it

Videos will be up tonight!

SO this is now unofficially the 2nd 6G74 swapped Galant in the nation :)