91 4afe to 93 7afe questions... Options

[Punisher]

Ok, bought a 93 corolla DX.. thought for sure it was a 4afe.. it's hard as hell to tell the difference between the 4afe and 7afe sometimes.. I guess I just have to take a peak at the ECU. The VIN says it's a 1.8L... however, checking the VIN both engines use an A as the 4th digit lol.

I got a 91 4afe for a 100 dollars.. was going to pick it up tomorrow.. 115K miles and a new timing belt.

So now my question is... I know I can use the 4AFE but what would I need to change on the motor to run the 4AFE with the 7AFE ecu/harness so this can be as quick and simple of a swap as possible?

The motor in the corolla has a hole in the block directly below the oil filter.. have no idea why.. didn't get to investigate yet. I stuck my fingers in though and I didn't feel a piston rod or anything strange.. lol.

The ever so small amount of power difference between the 2 motors doesn't bother me, this is more about economy and reliability than power.

[Bitter]

between 92 and 93 the engine sensors and heads changed. you can use the bottom end as its pretty much still the same between engine generations.


it will state on the emissions sticker if the engine in the car is 7afe or 4afe and the engine size. beyond that the physical differences can be hard to see.