[RESOLVED] 2.4 swap need a little help

[g_ferg]

I have just recently built a 2.4 and swapped it into my gsx. I am having issues getting the thing to start. It gets fuel has spark. And as far as i can tell the timing is dead on. I But i am using the 4g63 gears. And I thought i read a long time ago that the timing marks for the 2.4 were about half a tooth difference then the 4g63 ones. Is this true? if so then my timing would be off on it a full tooth. And if it is can anyone tell me which cam needs to be moved half a tooth up and which one down half a tooth please. Also any other input on this would be appreciated.

 

[delta448]

As long as the cams are aligned for TDC on #1 and the block is at TDC on 1 & 4, the timing is correct. The issue would be aligning the cams for TDC on 1 and then putting on the DOHC 4G64 timing belt without changing their position.

You would likely have to degree the cams to know if they really are at TDC with such a small difference as a half a tooth. Adjustable cam gears are probably going to be needed, along with a cam wheel and a dial indicator to degree the cams properly.

 

[snowborder714]

Here are pictures that someone sent to me that did a 2.4 build.

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[jasonlee]

what belt are you using? the 2.4 belt is slightly longer.

after setting the timing, did you rotate the engine 6 times and see if the marks still lined up the same as you initially set them?

 

[g_ferg]

what belt are you using? the 2.4 belt is slightly longer.

after setting the timing, did you rotate the engine 6 times and see if the marks still lined up the same as you initially set them?

I am using the 2.4 belt. And yes i rotated it and then even let the thing sit for about 30 minutes then checked the timing again on it.

 

[g_ferg]

Thanks for the picture snowborder714. That is how i set the timing on it last night also was smart and put my adjustable cam gears back on.

 

[dsm-onster]

Here are pictures that someone sent to me that did a 2.4 build.

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I'm having a hard time agreeing with those pics, since this website which so many use states that you have to ADVANCE the cam 1/2 tooth to get them to be correct with a 4g63 head on a 4g64 block. Those pics show it being retarded 1/2 tooth.

 

[g_ferg]

I'm having a hard time agreeing with those pics, since this website which so many use states that you have to ADVANCE the cam 1/2 tooth to get them to be correct with a 4g63 head on a 4g64 block. Those pics show it being retarded 1/2 tooth.

Well heck...i can redo the timing again when i get home and just advance it...only takes me like 10 minutes to do the timing on this just so lovely car

EDIT: The cams are actually advanced 1/2 a tooth each not retarded.

 

[1fastlaser]

make sure you set the crank timing notch to 93-94 timing not 90-92. it will be 180 degrees off. Cam gears are also an issue.

 

[g_ferg]

93-94 were 7 bolts correct? and i forgot to mention i have a 6bolt 2.4 and a 1g black top cas wired in also

 

[1fastlaser]

93-94 were 7 bolts correct? and i forgot to mention i have a 6bolt 2.4 and a 1g black top cas wired in also

yes, and its also how the g4cs or g64b is setup for factory timing.

 

[g_ferg]

I thought the g4cs would be set to the 6 bolt timing marks..well for the crank anways. is that wrong? And out of all of the threads ive read through i have never seen anyone say the bottem end needed to be timed like a 7 bolt motor

 

[dsm-onster]

Well heck...i can redo the timing again when i get home and just advance it...only takes me like 10 minutes to do the timing on this just so lovely car

EDIT: The cams are actually advanced 1/2 a tooth each not retarded.

Only a DSMer could retime their cams in 10 minutes . We're a strong breed!

 

[snowborder714]

I'm having a hard time agreeing with those pics, since this website which so many use states that you have to ADVANCE the cam 1/2 tooth to get them to be correct with a 4g63 head on a 4g64 block. Those pics show it being retarded 1/2 tooth.

So are those pictures correct or incorrect? I was talking with Whiteshadow about this and he's the one who sent me the pictures. He even said that the gears have to be advanced a half a tooth each, so I would guess he'd be correct with the pictures as well.

 

[g_ferg]

first pictures is the intake cam. and second would be the exhaust and in that direction they would be advanced

 

[dsm-onster]

Looking at the second picture (the exhaust cam sprocket), using the tooth directly after the stock 2.0 mark highlighted is what is being refered to by the cam gear underneath, right? Using the tooth after that mark to line up will turn the cam counter clockwise. This retards cam timing. Unless the cam gear below the top one is a 2.4 cam gear, of which I've never actually studied the timing mark. So which one is it?

 

[g_ferg]

Alright so apparently after all im not getting spark!!! GRRR dumbass friend apparently cant tell when something sparks. So i decided to tell him to crank my car over while i checked for spark. Nope not getting any spark at all. Grrrr ive been digging through this entire care when its something electrical go figure....So i guess tomorrow i get to go recheck all of my wiring for the cas. And test some other things. Also i have a COP wired into this. But its wired correctly and i am 99.9% sure the cas is wired correctly also

 

[g_ferg]

Looking at the second picture (the exhaust cam sprocket), using the tooth directly after the stock 2.0 mark highlighted is what is being refered to by the cam gear underneath, right? Using the tooth after that mark to line up will turn the cam counter clockwise. This retards cam timing. Unless the cam gear below the top one is a 2.4 cam gear, of which I've never actually studied the timing mark. So which one is it?

according to my aem gears it would be advancing the timing.... I will take a picture of them when i get home

 

[dsm-onster]

??? Those cams are retarded 1 half tooth.

 

[g_ferg]

They are advanced....and not lined up exactly so its a tad bit off....and actually if u look at the pictures above Its how they are marked also...right where these are lined up...

 

[g_ferg]

oooo yeah and the problem with my car was the ignition module. It was bad. Replaced it and everything is working great.

 

[dsm-onster]

Buddy, cams move clockwise. The cam gears are set to zero. If you clock the crank forward, so that those little lines on the gears line up together, the crank will read AFTER topdead center. If the cam gears line up AFTER topdead center, the cams are retarded that far off. As advancing both cams will show those marks lining up BEFORE tdc. Why is this so hard to understand???

Glad you solved your problem

 

[g_ferg]

Not hard to understand. Just haven't been thinking so straight apparently . But yeah you're right my bad