Engine Swap

[Rpappas]

Hi Everyone,

Here is what I have. A 2002 V70 XC, 2.4T with 195000 miles on it. I also have a 2004 S60 with a non-turbo 2.4 with 97000 miles on it. And I have acquired a 2005 2.5T engine that came out of a S60 with 80000 miles on it (I do not have the rest of the 2005 car, thou). I am considering swapping the XC's 2.4T with either the 2.4 non-turbo and make it a turbo or swapping it with the 2.5T. I think the ECM will need to be flashed with either swap to give the XC the proper programming for the installed engine, but that's as far as I have gotten in my research.

It seems these two engines should interchange with no real issues outside the computer programming. It is my understanding that the main difference between the two engines is 2.4 had a low pressure turbo and the 2.5 had a high pressure turbo. Outside the different emission settings for each of the engines production years. I think the ECM programming manages that.

I welcome any advice or any heads up to any problem areas I might encounter in this little project. Or tell me I am crazy and leave the cars alone.

Thanks.
Rob

[precopster]

There's a bit more to it. A 2002 2.4T has a CVVT camshaft which is solenoid and ECM controlled on only one bank; the exhaust.

The 2.5T has more power (about 12hp) and is still a low pressure turbo with some more stroke added to the crankshaft.

The big difference is that this motor has CVVT on both exhaust and intake and will require a 2.5T ECM and engine loom to avoid losing control of the intake CVVT. The intake CVVT can be locked in place but requires some research. The end result is that without electronic control of both CVVT camshafts you will probably lose that 12hp gain by using the later motor.

Using the non turbo motor in a turbo creates even more headaches. The non turbo 2004 motors had CVVT on intake only so again there is no way to control this with a reflash. Also without swapping pistons into the non turbo engine from a 2.4T motor the resulting compression rise from 9 to 1 to 10.5 to 1 will result in detonation problems during hot weather.

[Rpappas]

Thanks Mike. I really appreciate the info. Looks like we will keep the mfg setups in both vehicles. It was fun to think about it tho.
Rob