ok fellas i just bought a 99civic si, the engine spun a rod bearing (cyl4)the engine it has is a b16 block with itr pistons and p72 rods which are gsr i was told not sure what crank it has dont know how to identify it but anyways the head is a gsr. well i took the crank to a machine shop they said its no good and also my rods and pistons are seized but my dilemma is that i dont know what i should replace the damage parts with plz help me out i want and share ur knowledge with me
dont know if i should go with the same old set up he had done to it or if i should just go back to b16

 

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Holy detonation Batman, I can't see that being possible. The pistons would stick out of the block about 1/8" and you would have had 15:1 compression

 

the head may be the only salvageable piece. if the valves on the head aren't bent to crap, if they are just replace them, then just find a stock b18c, b18c1, b18c5 block and mate it up to your p72 head. there's really no point in finding another b16 block unless it's a really good deal. i would say b18b or b20 too, but i'm not a big fan of ls/vtec.. to each his own, it's up to you.

 

It sounds like something is up with that engine. You can't use P72 rods in a B16 block, they would be too long. The pistons would be lower compression that B16 pistons, so that doesn't make sense either!

You sure the engine you have, isn't a B18C? Anyway, just buy a new engine and call it a day

 

yeah this engine set up is mind boggling
ok well i dont know if this would make a diff but but i was just told that this block is a ctr block its stamp b16b and has hmo right next to it and on the back of the block its stamped p72 which is gsr right???

 

sorry bout the heading new to this site but thanks for the info

 

ok, if it is a B16B, that is a Civic Type R block (CTR). That is the exact same block as a gsr and Type R, so that makes more sense now

 

ur right the pistons do come up over the block dont remember how much its already disassembled so i cant measure it is this bad does it make it more likely to hit a valve???

 

what do you mean its the same block? the b16b has a way shorter stroke than the GsR/ITR block. almost a 10mm difference (same bore size though)

 

What do i mean????? ALL B16B, B18C, B18C1, and B18C5 blocks are "EXACTLY" the same, and stamped P72

The B16B is way different than a B16A. The B16B is a "destroked" B18C

 

yeah u are right bro i did more research and took the block to a machine shop and they are the same bore wise and they are stamped p72 so it is a 1.8L block

well sad to say but the B16b was not worth fixing so i just bought a complete long block b16a1 but i really appreciate the help and info guys hopefully i can help u guys in the future