I have a 2008 Scion xB with the 2FA-ZE motor I’m consuming oil and every 800 miles I have to add more oil. I’m planning to rebuild but I need the car to get back to and from work I was looking around my area for another Engine checked all junk yards and Pick n Pulls the closest one is 7 hours away but I couldn’t find one closer. I did a little research and found the same motor was put in the Scion tC. I found a 2008 Scion tC with a bad motor he says there’s no crack or rod knocking it just quit one day and wouldn’t start. Could I take that motor and rebuild the motor and put that motor in my Scion xB I know I’d have to change the mounts and (maybe the timing cover) from my Engine to the tC engine I just wanted to know if the tC motor would work in my xB and what I would need to do like change ECU, etc.

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have you done any testing to determine what's wrong with your engine?
Depending upon issue, there may be simple solutions.

Engine swap is extreme effort.

 

I ordered a new head and I’m assuming it’s the piston rings what’s weird is the car doesn’t blue smoke at all unless I let it idle for 15 mins and it does blue smoke a little but not much. After I add oil I’ll drive it too 800-1000 miles and it’s lost 1.5 quarts of oil.

 

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What kind of oil have you been using?

 

I can either use 0w20 or 5w20 ive been using 5w20 full synthetic mobile one

 

Before you decide to swap, try an old method of cleaning the rings. Pour a can of Sea Foam into cylinders and let it stand for a day. When I say pour, I mean divide a can evenly between the four cylinders with the plugs out…Then: (After a one day setting) crank it over with the plugs still out and an old towel over the plug holes to catch the fluid. Reinstall plugs.
NOTE! Change oil before you run it again! The Sea Foam will have gone past the rings and diluted the oil. Now run it to full temp,(cooling fans running). It will smoke quite a bit after this, that’s ok, let run on till that clears up. Replace the spark plugs with new ones and drive a week checking oil to see if it still using as much. It may get better with time.

 

Hey, piston soak is great last-ditch hail-mary effort. Can't hurt!

I used a PB-Blaster and acetone mix on my wife's Corolla. It had been been burning quart of oil for very 1500-miles or so and one of cylinders had 60psi compression. After 12-hr soak, there was 190-psi compression across board! Switching to full-synthetic oil really kept the sludge and ring-clogging away. Engine made it another 100k-miles to 300K without any issues!