So yeah timing belt went on my 04 Aveo.. Need advice on swap

Nemasys · Post by **Nemasys** » Thu Nov 06, 2008 12:26 am

And its costing me 2094$ CAD to fix it... So not really an option...

Ive been interested in swapping in a 2.0 for a while (u20sed, engine found in the optra) and i think now would be a good time, but how hard would it be to swap the engine in?? I should be able to keep the same tranny/ecu and accessories right? ( i have a/c and i want it to work with the 2.0) Maybe a little work for the mounts would be involved, i need opinions before i do anything. Thanks in advance.

Nemasys · Post by **Nemasys** » Fri Nov 07, 2008 12:25 pm

Anyone? I just dont wanna go thru the trouble of getting an engine and stuff and it wont work

Big Jeff · Post by **Big Jeff** » Fri Nov 07, 2008 2:12 pm

i don't know about the a/c,
but as far as the mounts from what i have heard you will to do some work on the front mounts,

if you leave it a bt longer other people will reply

Nemasys · Post by **Nemasys** » Wed Nov 12, 2008 3:23 am

So one one can give me any info on this? PrecisionBoost or GSE im sure you guys know something, i dont post often here but i read the forums every day, im kinda disapointed to get no answers for this, im just unsure what to do and dont wanna start spending a thousand dollars for nothing.

MMamdouh · Post by **MMamdouh** » Wed Nov 12, 2008 9:04 am

well... the engine is bigger in size and heaver so space and suspension might be an issue

no one ever tried this on an Aveo so the feedback you can get is very thin

MMamdouh

daewoomofo · Post by **daewoomofo** » Wed Nov 12, 2008 10:54 am

thsi is all i can find. its a Swift, but its the same thing as an aveo
http://www.daewootech.com/forum/viewtop ... ft&start=0

gse_turbo · Post by **gse_turbo** » Wed Nov 12, 2008 2:17 pm

there is a guy how has done the swap on aveoclub.net and averythin went perfect. it was a perfect fit and used the motor mount from the 2.0 without modification.

I'll take a look at aveo aveoclub.net, I suggest doing the same.

GArrett

Nemasys · Post by **Nemasys** » Wed Nov 12, 2008 11:35 pm

Do i need both motor mounts? The left one thats over the wheel under the air intake and the front one? I tried looking for the front one but cant seem to locate it, maybe im not looking in the right place.

Nemasys · Post by **Nemasys** » Thu Nov 13, 2008 12:15 am

Nvm i just found my answers in aveoclub, i was a regular poster on there before and roughly 5 months ago the link stopped working so i thought it was dead.

Some guy swapped a 2.0L and turboed it, he said you dont even to change ANYTHING, the original mounts from the 1.6 work without any problems, all you have to do is change the block, everyhting else bolts right up! But i will also swap the ecu (dont need the harness just the ecu itself) But heres a good question, the car is a manual, but what happens if i use the ecu from an automatic?? Do i need to use the ecu from a manual only?

Time to get this going!

Big Jeff · Post by **Big Jeff** » Thu Nov 13, 2008 2:04 am

as far as i know you can put an ecu fro an auto in to a manual bt can't put a manual in to a auto
but i might be wrong

Post by **PrecisionBoost** » Thu Nov 13, 2008 3:02 am

This is the first time I've noticed this thread.... yes.... the 2.0L is a direct drop in... which was proven quite some time ago with project super swift.

Do not use an automatic ECU with your manual.... it will cause problems due to the fact that the ECU will expect feedback from the auto tranny.

The main thing you will get is idle problems ( among other annoying issues )

Will the car drive with an automatic ECU.... yes.... but it will be different than the manual ECU.

How many kilometers do you have on your Aveo?

Nemasys · Post by **Nemasys** » Thu Nov 13, 2008 5:54 am

The car has 115 000 kms (yes i know i shoulda changed the belt prior but lack of funds/time/badlucks i couldnt do it, i knew this would happen it was just a matter of time) But hey all bad things lead to good ones, im more then happy to get a 2.0 lol!

So manual ECU it is, thats not really a problem just a question i was pondering, another question is, the 1.6 ecu can control the 2.0 (probly wont have full power) but if i do decide to get the 2.0 ecu, do i need the entire wiring harness or just the 2.0 ecu with the 1.6 harness? And will the 1.6 harness work with the 2.0?

Sorry for all the questions, just wanna do this right!

Thanks!

Post by **PrecisionBoost** » Thu Nov 13, 2008 11:09 pm

From what I've heard using the 1.6L ECU / wiring works fine..... but I don't personally know those who have done it so I wouldn't give it my 100% recomendation.

The closed loop operation will be just fine ( regular driving where your not at idle or wide open throttle.... the ECU is using the O2 sensor )

In open loop at idle the engine will be injecting less fuel than normal ( approximatly 20% less ) which will make it a little bit lean

That really shouldn't cause any problems since the car is not under load.

However.... in open loop at wide open throttle you may end up causing some issues.... it's really hard to say.... naturally aspirated vehicles are not quite as sensitive as turbo cars.

In open loop the car ignores the O2 sensor and simply goes off the pre-programmed maps in the ECU

Since the 1.6L is 20% smaller than the 2.0L again in theory the maps will call for less fuel and your car will run lean.

There are ways to fool the ECU into sending more fuel.... you can add a SAFC or some other type of system that changes the MAP signal and IAT signal to make the car inject more fuel.

Alternatively run higher octane fuel..... since it's normally set up for 87 Octane use 91 Octane and that should theoretically balance things out.

As well in theory with the Premium fuel and lower duty cycle the car should make slightly more power ( and get slightly better than normal gas mileage )

Of course it's all up to you.... as you could probably get away with running rot gut 87 Octane fuel with no additional electronics to compensate the injector duty cycle.

Personally I wouldn't.... but I guess it depends on how long you want your engine to last.

Nemasys · Post by **Nemasys** » Fri Nov 14, 2008 12:41 am

Thats fine, ill keep the 1.6 ecu and wiring harness to keep cost down for now, ill run the car with premium fuel and take it ez until i can get my hands on a 2.0 ecu probly after chrismas or something.