I know this is a stupid question but I haven't ran into a situation like this before . I bought my zz4 engine with the heads removed and today I am putting the heads on when a question entered my mind , How do you know which head is for which side ? Can you bolt the heads on backwards ? I only want to do this once so I figured I would post this question here . There are arrows cast into the heads and I have pointed them toward the front of the motor . I figure it dont really matter what side they go on but hell it dont hurt to ask !

Thanks for the info guys !

 

make sure the holes for the accessories are facing towards the front of the engine.

 

Um, the heads should be drilled on both ends. The only thing that would make a difference would be if the temp sending unit was installed on one head, and the other just had a plug or a fan switch in the same spot. Otherwise, it wouldn't matter.

 

both heads should be identical, so there is no "driver-side" head or "passenger-side" head. (atleast not for those L98's)