We are rebuilding an AAZ motor and have 2 rod/piston assemblies from one engine, and 2 from another. On the rod caps, 2 are stamed "42 K3" and the other 2 are stamped 32 K5"
We used to bad bottom ends to make 1 good one, there was 4 of each number.
Are we ok to run 2 of each in the same engine?
i doubt they would anything like weight, probably more production dates. [i.e. 35 th week, 1995]
i'd say just re-use the right rod for the right cyl. so if you take cyl 1 rod from a motor, put it into cyl 1 of the one you want to rebuild... there has to be a reason why machine shops keep everything together :wink:
check the weight...should be different
if you mix 2 sets of rods make them even