Anyone on here have a b21a1 on their ef? I know they have a really bad rap for having bad sleeves and burning oil but I was wondering if it would be worth it to rebuild one.

 

i wouldn't buy/rebuild one if i were you, they don't tend to last very long...

 

Also, some fairly serious custom fabrication issues would be involved in swapping this motor into your Civic/CRX. It is actually VERY different from the newer B-series motors and does NOT just drop in with a Hasport kit. And the B21A is just too weak to justify the work required to swap it in.