crankshaft swap question?

mjm_06 · 07-02-2009, 09:38 AM

Ok guys i've been doing a lot of research and was wonder if the 2.4L crankshaft rods and pistons out of a stratus would work in my 420a block. I had read somewhere that is the crank that they use for the stroker kits.

Is this true or not, because i have my block tore down ready to go to the machine shop with plans of a stroker kit and i have a 2.4L sitting behind my shop right now.

thanks guys.

marcus

LD25Delta9 · 07-02-2009, 10:23 AM

No. The bore is different.

mjm_06 · 07-02-2009, 12:15 PM

Do you know how much diffrent because i planned on boring it out. But will the crank work?

LD25Delta9 · 07-02-2009, 03:19 PM

Well after extensive research, I guess the bore size is the same and if you are planning on boring your block anyways, you may be able to fanagle something. I would reccommend against it, however, especially if you plan on boosting it. You'd be better off just getting a built stroker kit, cause stock parts don't have the same tolerances as aftermarket. I guess it all boils down to how creative and unique you want to be.

BoostedPhoenix · 07-02-2009, 03:30 PM

2.0 litre main bearing journals are narrower than 2.4 litre's . The crank wont fit no matter what and the deck height is taller on the 2.4 as well. so better figure out what pistons youre gonna run to work with those rods even if you made the crank fit

Best option is look into using the 2.4 block and crank with some aftermarket pistons. Little more modding to the rest of the setup but a little extra torque and much cheaper alternatives for pistons if youre going turbo

mjm_06 · 07-02-2009, 03:43 PM

ok thanks guys. I have a 2.4l block complete and running when pulled (we pulled it for the tranny). So your saying that i can take the 2.4L block and run my 420a head on it and that would be my best bet.

I should add that im not PLANNING on boost but maybe some day down the road it might be a thought i just wanted to build a solid motor first.

And when you say a little extra modding to do the 2.4L are you talking about the head?

thanks again guys

big help

RoninEclipse2G · 07-02-2009, 04:00 PM

the timing side mount is different too. IIRC you have to modify bits from both the 2.0 and the 2.4 to get that to bolt in.

mjm_06 · 07-02-2009, 05:57 PM

Thanks guys, that is what im going to do, 2.4 block is getting tore down this weekend im going to send it to the machine shop to get refreshed and ###### some new pistons, with my 420a head that will be ported and polished adjustable cam gears, new cams. Header and bored intake.

I really appreciate all the help guys

marcus

psycho · 07-03-2009, 01:13 AM

You have to:

-Remove balance shafts, plug oil hole and mod oil pan to accomodate exhaust.
-Fabricate a passenger side motor mount.
-Rotate the cam magnet.
-Swap injector and coil wires at the ECU plug so the motor can run.

Etc.

Get a nice set of cam's to help the motor breathe up top.

mjm_06 · 07-03-2009, 10:16 AM

is all this work going to be worth my while. I dont have a problem fabing anything my cousin is a machinest.

Is my exhaust/intake going to be the same as 2.0

RoninEclipse2G · 07-03-2009, 05:27 PM

mostly, I think you have to fab a longer downpipe because the block is an inch taller.

you just reuse the 420a intake.

psycho · 07-03-2009, 10:26 PM

If your cousin is a machinest, everything is pretty easy and it will be well worth.

The 2.4 dies up top though, so anything that helps the motor breathe (porting, 60mm TB, cams, header) will make it even more worth while.

mjm_06 · 07-04-2009, 07:27 AM

awesome i cant wait to get this thing done. Im actually giving up my autobody job to go run a CC machine at my cousins shop so i should be able to make anything i need.

thanks guys

marcus