I bought an engine at a junk yard and when I paid for it it was still in the car . They just called and said I lucked out because it's a jcw engine and it comes with th SC ! I'm happy to say the least. A couple of questions
Is this a direct bolt in into my 03 ?
There's a transmission available. Should I buy it as well ? Is it posi ?

 

Anything is possible, mummy told me lol
they might try and claw back some money selling you the tranny, have a scout around for prices first.
what engine do you have now? Surely a jcw would need the correct ecu etc?

 

My engine ... 15% sc , 2% crank , wmw cat back ,custom intake . My engine is blown .I was told it comes with everything but ill probably have to pay for the ecu .
Are all jcw tranys limited slip ?

 

As far as I know the jcw engine is really a tuned up cooper s so as far as fitting should be fine, I would be inclined to keep as much good stuff off your old one as you don't know why the scrap one was there. S/C, alternator etc.

I'm not 100% on engine swaps personally, but you might need the jcw keys with it, which might mean they wont fit the locks on the car etc but im not sure.

i would imagine jcw would be LSD but to be certain gearbox code would need checking. IIRC BKL is the lsd gearbox but Google should reveal all

 

I don't have direct experience with this but I bought some wheels for my MCS off a guy who swapped a JCW motor into his MCS. I remember him talking about what a hassle it was to get the door locks to work. Sorry I don't have more details, but this may mean that you can't just swap ecus because the computer won't recognize your key.

 

Would getting a jcw tune and using my computer work ?

 

you might need the jcw keys with it, which might mean they wont fit the locks on the car etc but im. /QUOTE
That brings up the question of the keys fitting my ignition as well , wouldnt it ]

 

Let me clarify my question . The key fob has a chip that the ecu sees and uses to allow the car to start and unlock the doors. So if I get the jcw ecu I need the jcw key fob to unlock/lock and start the car . I would also need my key to unlock/ lock manually and turn the ignition . So 2 keys . No big deal . I just want to drive !!
Am I missing anything ?

 

the ECU are VIN specific.....if you plan on getting the ECU, you will also need the EWS module, the keys, and the ring around the ignition switch for the ECU to work

Just get the engine and install it in your car.....it will run fine with your ECU and should not have any problems

Bryan

 

^^This^^
The factory ECU that you already have, will adapt "well enough" to run the car with no real problems.
If you want to take advantage of the JCW components in the engine (basically just Cylinder Head with larger exhaust valves, 380cc Injectors and smaller pulley)
look into a tune for that/your current ECU. Don't bother with the ECU from the other car.

You didn't mention the year of the car it came out of, but...

The engines will swap no problem, you'll just have to, and want to, use the mounts, brackets and sensors from you car.

As far as transmissions, it just depends on if they are the same, of the manuals, there were 5 speeds, and 2 different 6 speeds available (different gearing) for the S/C cars, and your car is coded for what you have only. They can be swapped, but there is a considerable amount of extra effort involved.

If you can get the VIN from the other car, you can look up if it came with an LSD or not, that alone may be with the purchase, esp if the transmissions are the same.
I honestly don't remember if the pre-facelift and facelift transmissions (the two versions of 6 speeds) use the same diff or not?
​​​​​​

 

From your other thread, if it’s the original engine and trans out of an ‘04 with 80K, then no LSD, unless the trans was swapped with a facelift LSD trans, or it had an aftermarket LSD installed at some point. They only became an option beginning with the facelift in ‘05, and standard, along with the JCW brake kit, on an ‘06 Factory JCW.

Also, since the factory JCW wasn’t available until ‘06, anything before that was a Dealer add on kit. There were two different JCW kits, a 200Hp and a 210HP JCW kit. The 210HP kit became available during 2004 so the engine could have had either kit installed. You won’t know until you see the fuel injectors, or the airbox if it hasn’t been changed. I would ask them if it has a JCW airbox. If so, it’s most likely the 210 kit and I would also see if they’ll include it with the engine, or sell it for cheap.

 

Thanks so much guys . Great info. The JCW engine is indeed out of an 04. I feel much better about how to proceed and I'll stick with my ECU . I've seen it mentioned in other threads that some dealers will flash the JCW map for a nominal fee .
I also intend to transfer my 15% SC and 2% ATI crank pully over to the new engine unless there's some reason I shouldn't

 

I would definitely transfer the ATI.

There are a few options regarding the SC and pulley:

• Transfer your old pulley and sell or keep your old SC as a spare if it’s good.
• Run the JCW as is but you might feel the power loss between the 11% and 15%.
• Transfer the whole SC if it’s good and sell or keep the JCW as a spare

If you transfer the SC pulley, make sure to use a JCW specific puller. All of the threads I remember reading about removing a JCW pulley without one always ended up with a mangled pulley that needed to cut off, often resulting in damage to the SC shaft, snout bearings, or seals.

 

Anything special about the exhaust maniold on the JCW engine. Should I try to buy it as well.

 

I believe "adriancl" on this forum can program your VIN to the ECU, keys, etc. at the same time he remotely tunes your car. Touch base with him for info.

 

I need to remove my 15% cravenspeed pulley from my SC and also pull /or cut the JCW pulley . Is there a puller that will do both ?

 

The exhaust manifold is the same for the all non diesel first gens, regular, SC, JCW, and even the GP. I would see if the seller could send you a pic since these cars are often modded and they might not realize what manifold is on it.

Interestingly, they’re all supposed to use the same cam too.


There’s a smaller sized JCW puller which should be available from Cravenspeed or Way Motor Works.

The 15% should only need an Allen wrench to remove it, plus maybe a socket if different bolts are needed to separate the pulley from the collet. I haven’t removed one yet, but I’m pretty sure the procedure is to remove the Allen bolts, then screw some bolts (the same Allen’s?) into the other, threaded, holes in the pulley which should push the pulley off of the collet.

 

As mentioned above, the exhaust manifold is the same, but the rest of the exhaust is different (if still factory) and actually very desirable (at least the '05 and later were), free flowing with a good tone, not overly loud or raspy.

 

Thanks for the help guys, greatly appreciated .I'll post when it's in the car .

 

One small note....the only difference you may find is that the true JCW air box will have a vacuum hose running to the plastic "T" connector between your throttle body and the bypass valve.

if you don't get the RPM electronics for the air cleaner, you will need to either cap off the "T" connector or remove it

Bryan

 

Thanks.

 

I think I just found a major issue. The JCW engine has a 5spd manual transmission so if I understand correctly the 6spd mt and 5sp mt have different input / output shafts and aren't interchangeable which means I'd have to buy the trans as well . Is the 5sd going to kill performance. Why would a JCW have a 5 spd trans

 

Because it's an '04 JCW, those were the 200HP rated cars, that were delivered stock and had the JCW kit installed by the dealer, the original owner probably just missed the 5 to 6 speed switch, esp if it was built in late '03 as an '04.

 

Uhhhh. No R53 ever came from the factory with a 5 speed. They're not selling you a W10 with the R50 JCW kit or something weird, are they?

 

can you post pictures of JCW engine and trans??