racecarpete

Ok i tried the civic forum and the tech forum so now i am turning to you guys. I have been in the market for a b18b block that i can have sleeved and build for turbo. Yesterday i got offered a bare b18a block w main caps for 50 bucks. I don't knoww much about the b18a so i am asking what the difference between the b18a and b18b? Also can i still add a b16a2 head or will i have to run an older b16 head. thanks.

racecarpete

anyone?

avividmemory

it will work if you use the b18a block...they are more or less the same in my opinion...both are ls blocks

racecarpete

so will it work exactly the same? i heard something about the b18a being different cause it has a breather box. Also, will i be able to use a b16a2 head? thanks

ChiBoy

My understanding is that the blocks were essentially the same except for the mounts. I think the driver’s side mount is different, but that you can change the part that bolts to the block on that side and it will fit. I don't want to say this to be absolutely true, but maybe someone can confirm for sure.

racecarpete

i was told they are essentially the same once you take the sensors off, is this true??

93LSivic

THey are identicle. I blew by b18b and replaced it with a b18a block. Only difference I saw was some type of a coolant sensor above where the oil feed is on the A block....im assuming the b18a head doesnt have a coolant sensor on it like the b18b's do.