A friend of mine just bought a 94 4runner with what sounds suspiciously like piston slap. I've found a 3.0 out of an 88 pickup, what differences are there between these years please?

Thanks,

Michael

That's a lot of years difference, one thing to look out for is the oil pressure sender is different between models with a oil pressure gauge (like the SR5 pickups and 4runners) and the models with a oil pressure warning light (like the base model pickups). Getting them mixed up may damage the gauge. There may have been a change in other senders or sensors. Almost certain the engine wiring harnesses are different, so you'd want to use the 94 engine harness and all the 94 sensors you can. The timing belt tensioner is different, but that may not effect anything with a complete swap.

Fuel injectors are different. 88 has low impedance and 94 has high impedance. ECU's are different to control the different injectors.

Thanks guys, that pretty much was what I expected. Anybody got a line on a cheap 3.0 in the 94 range?

Maybe you could swap the injectors and use the 94 injectors. Of course you would want to keep the 94 ECU.

i don't know if the h/g on the 88 is less troublesome, but if that years h/g was trouble free, that alone would make me wanna try and work with the 88 3.0.

Yeah those were the good (asbestos) gaskets back then, well good unless you had to breath the dust from scraping/cleaning them off.