I recently purchased what was supposed to be a 96 Spec JDM B18C- R. I am positive the head is an ITR, but the back of the block is stamped p72 (1-1) and the engine code is B18C. After scrubbing the whole engine down so I could read all the codes I noticed that this block may be a JDM GsR. If someone could help me identify this I would appreciate it.

 

p72 is a gsr head

 

the head doesnt say p-72, the back of the block does

 

you have a 96 spec type R motor.

 

how do you know?

 

i do not want to believe that the seller (not announcing his name yet) scammed me, but we both need proof that this is or is not an ITR motor. If somebody can prove to me that this is an ITR motor I would appreciate it. If you do have a 96- 97 spec ITR motor please post your casting marks, especially on the back of the block next to where the transmission bolts to.

 

If im right all p72 markings are GSR models. The JDM GSR is stamped b18c like yours posted above. My brothers was the same before he sold it.

 

Well the head says Pr3, so it's either a b16 or ITR head

If the block says p72 then it's more than likely a gsr block

 

P72=GSR

Usually the casting is stamped with what piston is inside

ie: a jdm 2nd gen b16 says P30 on the block and has p30 pistons

 

there is no way to tell without taking the motor apart...if it has an itr crank you can pull the oil pan to get a look at the crank....pr3 is just a b16 head...p3-X meaning there is pr3- 1-4 and 1 through 4 is just the casting number....the casting number does not mean it is or is not a type-r head. only way to tell if it is a type-r head is to look at the intake ports and see if they are rough or smooth about 2-3 inches up from the valve. normal b16 heads are rough casting from the valve all the back. of course this still isnt 100% accurate way to check.

 

complete bullshit, all itr motors are built on p72 blocks. if you are hell bent on finding out you have to either use a fiber scope in a spark plug hole to look for the dome or pull the head. that's likely a 96-97 itr engine. some of you lames who are posting have no clue what you're talking about and you know it !

you could also pull the valve cover and inspect the cams, look for the yellow and blue springs and see what you find.

also, early jdm itr engines had no port work. they were made as cast. late 96 and 97 were hand finished and 98+ were cnc

 

I called h motors and it is a realt itr. Aparently all b18c notors have p72 stamped on the back. My intake manifold is a p73 along with a large intake port. Looks like I lucked out

 

thank you for posting exactly what i just told you

good job

 

ITR blocks use the P72 block, oil pan, oil pump, and many other parts. The only difference is that the ITR uses ITR crank, rods, and pistons.

 

I never said you were wrong. I just wanted to verify it with someone else

 

Got to it before I did. You've got an ITR engine.

 

lol either way its probably over priced j/k

 

 

Aren't the blocks stamped with what piston is inside?
It should say p73 on the block no?

Never had a itr myself but all my LS were stamped pr-4(pr-4 pistons), b16 1st gens were stamped pr-3 (pr-3 pistons), b16 2nd gens were stamped p30(p30 pistons). etc etc.

If this applys to his block then he's looking at gsr slugs inside, but hey like I said I've never been lucky enough to own a R engine

I agree I fiber scope would clear up any confusion

 

all JDM Gsr/ITR engines are stamped p-72 (1-1) on the back. Steve at HMotors helped me identify it. The intake side of the head has a smooth polished finish along with the correct casting marks. You can tell the motor has never been internally modified. There is not one leak and all parts are OEM. I just got scared when I saw p-72 considering thats what my GsR engines casting says on the back. The guy I bought it from got it from H motors also and it is infact a 96-97 spec ITR

 

Damn Japs and their misleading labels lol

 

Gsr would be B18c1

 

A jdm gsr is a b18 c brother

 

im no expert on b-series but i thought the block would say b18c5 if it was a type-r engine????

 

pr3 is a cylinder head casting for the itr/b16, those stamps on the cylinder head are casting numbers.