TheTruth83

i have in my possesion a very stock 99 Si, (airbox,stock exhaust). upon inspecting i noticed the block code reads.

B16
serial number


Shouldnt this read b16a2????

i can only assume the short block has been changed???

rick_rabies

seems jdm. i think jdm motor on had the letter and displacement as us and uk and sa
had country codes such as b18c 1 or 2 or 3

JasonYo

A jdm b16 sais B16A. So it might not be a jdm.

rick_rabies

oh. sowy. it thought it was the other way around. usdm

packman5280

usdm says b16a2, jdm says b16a, not sure what it means if it just says b16 with no a. mine from hmotors says b16a, then where the 2 would be there is a very faint HMO stamp.

if the serial number starts with a 5, it is an SiRII motor, if it starts with a 1 it is an SiR motor.

TheTruth83

Sorry fellas i made a mistake, heres a picture, im just trying to find out if its the original block that came with the car or if the block has been replaced

BryanM.

iTrader: (1)

That's not a USDM block, therefore not the original. It's foreign, most likely JDM.

If it's running fine I wouldn't worry at all, unless there is an inspection issue (smog/ref or whatever).

TheTruth83

no inspections here, just trying to learn about this car man. Thanks.

packman5280

nope, not the original motor, but pretty close. as long as the sensors were changed to keep it obd2b, it should be fine.

TheTruth83

I see, what kind of car/year is this motor from?

Is it possible its just the older block with 99 si head on it?? if thats even possible?

What sensors should be different?

roadsqueegy95

well its pretty much the same motor that the 99-00 si's came with, its just not usdm. its probly a jdm motor. and over seas they have been made alots yrs!! not quite sure what all cars had them tho

98civdx

no telling what car it came from. except is prolly a civic lol
yes it is possible to put a b16 head on it as its the same motor.