Quote Originally Posted by Si Speed 317 View Post
I'm looking at a K20z1 motor and tranny today as a trade for my GT42RS. First time buying a motor and/or tranny, what should I look for? 50k miles on them, compression test was 155-160 across the board, the guy said.









Has some K-Tuned goodies and is real clean. What do you all think?
Wow that looks really clean! I assume it's lower compression with those numbers? I would ask for a receipt, if he has one with those numbers on it that just helps back it up. Also I would turn over the motor via the crank pulley bolt, it's a 19mm, so take a socket and a wrench/breaker bar with you, it should turn over easily enough by hand even if the spark plugs are still in. I'm not sure there is too much else you can check out without taking it apart. As for trans I really am not sure there is much you can do without taking it apart. Sounds like a pretty decent trade though Hopefully others can chime in and say I'm wrong and give you lots of things to look at! I would like to know as well because hopefully this weekend I will be checking out a z1 bottom end (all stock) to use temporarily while I get funds together for a motor build.