2.4 head swap?

Doing a SRT-4 Motor swap into your Neon, maybe even a 2.4... have questions about it, what you'll need or what issues you'll run into? Answers can be found in here.
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2.4 head swap?

Post by neonjake27 » Thu Mar 25, 2010 9:39 pm

so i've been looking around for months. can i put a 2.4 dohc head on my 2.0 sohc block?and if i can which head to use? cause i have access to plenty of 2.4 heads but not 2.0 heads

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Post by mikeb818 » Thu Mar 25, 2010 9:48 pm

search around

from what i have heard the 2.4l head on a 2.0l block will give you lower compression. which is good on turbo cars not N/A. also there has been a couple people who say the cylinders have touched valves. not good. it will give you good low-end power but nothing really in top end.

someone else chime in to see if what i said is correct :thumbup:
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Post by FAC3L3SS » Thu Mar 25, 2010 9:51 pm

I believe a first gen, 2.0 DOHC will bolt on, but nothing lines up. I'm gonna go ahead and say the 2.4 will not work.
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Post by mikeb818 » Thu Mar 25, 2010 9:56 pm

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Post by neonjake27 » Thu Mar 25, 2010 10:12 pm

sweet.. yeah i'll pick up a 2.4 head go from there. thanks im going turbo so it'll all work out hopefully
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Post by occasional demons » Thu Mar 25, 2010 10:52 pm

mikeb818 wrote:also there has been a couple people who say the cylinders have touched valves. not good.

someone else chime in to see if what i said is correct :thumbup:
That is DOHC pistons touching SOHC head. (which Raises C.R.)

Valves hit cylinder walls/deck when putting 2.6 heads on 2.0 blocks. But that is a Mitsubishi thing. :roll:
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Post by heydockyle » Fri Mar 26, 2010 3:18 pm

2.4 head and 2.0 Dohc are identical.
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Post by esteinmaier » Fri Mar 26, 2010 4:22 pm

Just mill the head to make it true, and then you'll be back up to almost stock compression again, but a better flowing head. Any pre-03 2.0 or 2.4 DOHC head fits.
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Post by neonjake27 » Fri Mar 26, 2010 7:15 pm

allright how much you think i should mill it?
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Post by esteinmaier » Fri Mar 26, 2010 9:12 pm

Depends on the application. Only you can really decide. Put it in a calc.
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Post by occasional demons » Sat Mar 27, 2010 9:59 am

neonjake27 wrote:sweet.. yeah i'll pick up a 2.4 head go from there. thanks im going turbo so it'll all work out hopefully
Well with boost you would want to only have a clean up pass, to keep the C.R. lower. This would give you a little better tuning window anyways.

Just a word of caution, if it is warped, only milling it will give you major grief. It would need de warped, then milled. Otherwise the cams may bind. Basically, if the cams spin freely with it off of the engine/rockers removed, it should be OK, or damn near.
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Post by neonjake27 » Mon Mar 29, 2010 3:19 pm

allright anotherr question. im buying low comp pistons and forged rods. should i get sohc or dohc pistons? they say they'll work with either but wont the valves hit?
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Post by Danteneon » Mon Mar 29, 2010 3:24 pm

It was my understanding that the reason people use DOHC pistons in a SOHC was to raise compression. Since you don't want to do that, I would say stick with the SOHC pistons. No fuss, no muss.
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Post by neonjake27 » Sat Apr 24, 2010 1:43 pm

ok i got a 97 stratus 2.4 head.. do i get head bolts for the 2.4 stratus or 2.0 neon? same with headgasket.
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Post by occasional demons » Sat Apr 24, 2010 6:18 pm

Technically either will work. There is a DOHC, and SOHC HG, but IDK what the difference is. The bolts, unless the thickness of the heads at the bolt set is different, they would be the same.

I would go with 2.0 DOHC bolts and gasket. That would be for say, a "99 R/T Neon DOHC", as far as a parts counter person would need for info.

I am only recommending the 2.0 DOHC bolts, because I am too lazy to search for you, to see if the 2.4 bolts are different than 2.0 (Since you are going into a 2.0 block)
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Post by neonjake27 » Sat Apr 24, 2010 7:37 pm

haha allright thanks yeah im thinkn there the same as well.
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Post by JeffB#2 » Sat Apr 24, 2010 8:43 pm

Use 2.4 head bolts with a 2.4 block and DOHC head.
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Post by occasional demons » Sat Apr 24, 2010 8:49 pm

JeffB#2 wrote:Use 2.4 head bolts with a 2.4 block and DOHC head.
He is using a 2.4 head on a SOHC 2.0 block.

Not sure how much you read. or if you mis typed 2.4 block?
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Post by neonjake27 » Sat Apr 24, 2010 8:50 pm

forgot to say my 2.4 head is going on a sohc block
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Re: 2.4 head swap?

Post by occasional demons » Sat Apr 24, 2010 8:51 pm

neonjake27 wrote:so i've been looking around for months. can i put a 2.4 dohc head on my 2.0 sohc block?and if i can which head to use? cause i have access to plenty of 2.4 heads but not 2.0 heads
You forgot that you didn't forget. :D
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Post by neonjake27 » Sat Apr 24, 2010 8:54 pm

oh haha ah yes prezactly.. cause this head is holding me up from my turbo gettn put on.
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Post by JeffB#2 » Sat Apr 24, 2010 9:04 pm

occasional demons wrote:
JeffB#2 wrote:Use 2.4 head bolts with a 2.4 block and DOHC head.
He is using a 2.4 head on a SOHC 2.0 block.

Not sure how much you read. or if you mis typed 2.4 block?
Put it the other way, use 2.0 bolts with a 2.0 block.
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Post by occasional demons » Sat Apr 24, 2010 9:15 pm

JeffB#2 wrote:
occasional demons wrote:
JeffB#2 wrote:Use 2.4 head bolts with a 2.4 block and DOHC head.
He is using a 2.4 head on a SOHC 2.0 block.

Not sure how much you read. or if you mis typed 2.4 block?
Put it the other way, use 2.0 bolts with a 2.0 block.
:D

That's what I figured. So my recommendation of using a 1st gen DOHC for parts reference was a correct one. :thumbup:
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Post by neonjake27 » Sat Apr 24, 2010 9:22 pm

ok i'll hit up autobone tommorow
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Post by Cbussilver01es » Sun Apr 25, 2010 11:59 am

Or just Use ARP Studs that are for 95-99 DOHC Neon. Thats what Im gonna do, sometime in the future when ever I pull the Head again. But in your case I did the same thing and bought head bolts for a 95-99 DOHC neon, the hard part with the headbolts were making sure that the Headgasket holes still matched up once you tried to put the head on, and I put my head on with the turbo manifold still attached, and it sucked because it was so heavy and I had no one to help me With headstuds, I hope to avoid that problem in the future.


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Post by neonjake27 » Thu Apr 29, 2010 6:31 pm

ok got everything together.. now just what timing belt should i use? one for a 2.4 or a 2.0? and i would like to upgrade to the mechanical tensioner. I also heard i just flip the cam gears around?
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Post by occasional demons » Thu Apr 29, 2010 7:04 pm

I'm going to say 2.0 timing belt. I would think the 2.4 would be longer. Due to the added stroke, the distance between the cams' centerlines and the crank's is greater. It could be done without making the block taller, but I don't think DCX went to that much effort.

2.0 4667611

2.4 4621844

Definitely not the same part.

The gears, IDK. It is somewhere, possibly the head comparison thread.
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Post by neonjake27 » Fri Apr 30, 2010 6:58 am

so the 05 mechanical style tensioners will work with the 2.0 timing belt fine?
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Post by occasional demons » Fri Apr 30, 2010 8:36 am

Yes. I believe the SOHC and DOHC tensioner its self is the same part. I think there is an additional idler in there tho?
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Post by neonjake27 » Fri Apr 30, 2010 12:19 pm

yeah theres one on the head
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