OK I'm buying 90 civic dx sedan from this guy for $200 but his daughter was coming home from a party one night and fell asleep at the wheel (not going fast maby 45-50) and hit a light pole, it didn't do much just killed the fender and some suspension pieces.
But about 4 mounths before the crash he had the engine replaced (daughter again)and I dont know if he replaced it with the original d15a (neigther does he ) so can someone tell me how I can identify if it is a d15a or anything else? I'v never really been around the d15 or 16 so can you also recomend so upgrades?
Thank for all the help

 

it will say on the block right next to the tranny, its a small flat area with the engine code stamped into the block

 

Is it visable if you are looking down into the ebgine bay with the hood open? Is it on the right or left?

 

Most likely it is D15 just because if he would of put a D16 in there it would of have been converted to MPFI. My bet is D15 under the hood. As far as upgrades you can do simple bolt ons but I would recomend saving for a swap, a ZC or B series. If you swap you are going to have to convert to MPFI anyways so have fun.