Hi guys,

Firstly, let me say I have SEARCHED...oh how I have searched and I have got some information together.

My question is in relation to trying to determine if my engine is a genuine B18C(r) ITR engine or a B18C from a JDM Si / GSR.

So, firstly for those that do not know:

The JDM B18C from the Si/GSR and the B18C from the JDM ITR...BOTH are stamped B18C only..no number after the stamp excpet for the serial code underneath.

I know that the inlet manifold is different, but that could easily of been changed a long with another head...which leads me on to my next point.

It appears there is a misconception that the ITR head should be marked P72. This is wrong and is a GSR head. The ITR head shares the same cast as the B16A/B and is marked PR3-2, PR3-3 etc.

Now, the thing that is confusing me is this:

Should the B18CR from the ITR be stamped P72 on the sump and rear of the engine on the gearbox side or stamped P73?

I have been sent pictures of a B18C6 (UKDM) and it is stamped P72, but ideally I need pictures of a genuine B18CR from an ITR.

I would take the sump off and check the rods, but I believe the P72 rods were used in both the GSR and ITR blocks up to a certain year?

Here are pictures of what I've got. B18C from a Si...or B18CR from an ITR??





This is throwing me off, P72 on the back of the block, which people are assuming means GSR but I think they are confusing it with the GSR head code.




And these might help?





Thanks!

 

Pics of the ends of the cams? The coolant hose is further back....

 

Thanks for the reply.

When you say the coolant hose is further back...do you mean if mine was a JDM B18CR is should be further back?

Or that on my picture it looks like it is further back..so looks like it is a B18CR?

Will get a picture up of cams in a moment..quality may not be great.

EDIT:

Picture of cams, sorry about quality.

 

From what I know, where the B18c is engraed should be painted red on the ITR engine and not painted on the GSR. Also, for the head, on ITRs there's usually a green spot (square ish?) painted under/behind where the distributor mounts. Someone correct me if I'm at all wrong here but this is what I know. The ITR heads also came with more robust LMAs than the non-ITR heads, but you'd have to compare them to notice the difference.

I'll see if I can take some pictures of what I'm talking about (as well as back of the block markings), as I have a real, never opened JDM ITR engine.

One thing is for sure though an that's that you have a JDM block (no number at the end) and a JDM head (no VTEC oil pressure switch on the VTEC solenoid).

 

I have a JDM ITR swap so if you need me to look at my engine and verify anything let me know.

I am still a semi-noob but:

Its for sure JDM
*Type R's have dual valve springs,Red valve cover
*Oil cooler where oil filter mounts
*I dont think a Type R intake manifold will bolt to a GSR???
*If you look in port around the valve area you vcan see where the bowls where hand blended on mine.
*Type R's have a thick aluminum piece that bolts to the tranny instead of a dust cover.

 

Several parts on the ITR engine will be stamped P-72, because they are identical to the GSR parts. B16's and ITR's share the PR-3 head casting. ITR Engines have the beefy Stiffener/Flywheel Cover. What about the Oil pump, Water pump, etc?

If all else fails, pull the oil pan and check the crankshaft.


This is incorrect. Engines with the red paint on the ID stamp were purchased from the dealership as new, replacement engines, separate from a car.

 

- look for the dual valve springs on the intake side
- Green paint strip on the head, (pictured below)
- cam ends ( cant tell form your pic )
- P73 on the back of Intake Manifold

I **** my pants to when i got my motor. the bottom of the oil pan said P72 and i was like WTF??? but it is the same...The intake manifold should say P73 right on the back of it if its JDM ITR. What computer did it come with?

to Kablookie - The factory never painted the cast block stamp on any model of any year. ever. only replacements

here is your picture, but the arrow is pointing to where the green paint marking is...this is where mine is atleast...

 

Thanks for the correction on the red painted part.

DC2-prod. That's the same green spot I was talking about. I'll try to post a pic of it tomorrow.

 

almost sure that's a 96 jdm itr. pr3-2 is an early head. the hand finished ones were pr3-3 and machine were pr3-4 if i remember right{not 100% sure, if someone else is, say so}. you should have yellow paint somewhere on the intake springs and blue on the exhaust. the outside paint often comes off with engine washing. don't sweat it if it's gone. a pr-x head on a b18c block is often an itr. rarely would anyone go to the trouble of switching one to a gsr bottom anyway. also look like itr cam markings. the oil cooler is also often itr stuff. the usdm gsr lost it in 96, not sure of the jdm years or if the sir-g had one.

 

p72 for the itr oil pan is normal,,,ouach your block is crack on top of the back plug(look at the top/right of the back plug in the picture) sorry

 

I don't think he'll have any problems with a hairline crack right there.

 

still a good idea to tig it up before it keeps going. since the motor is out it's worth the $10-20 a machine shop would charge to weld it up.

 

ITR blocks are the same casting as the gsr blocks which is why it's stamped p72, however, the Pistons and Crank should be stamped p73

The Oil Pump and Water Pump are the same part numbers for gsr's and type r's

ITR blocks share the p72 (gsr) oil pan

 

its a type r head. i own a 97 jdm spec itr and its idenitcal to mine. the pr3-2 is definatly a type r. jdm versions didnt have 18c5 or 18c1 stamped on the block they just say b18c. now the only way to tell if its a true type r block is pull off the oil pan and check the crank gurdle, rods and pistons. the gsr crank gurdle is smaller than the itrs. the rods might say p72 as earlier itrs used p72 rods but the pistons should most definatly be p73. hope this helps

 

PR3-1,-2,-3,-4 are just the different casts, no correlation to year of manufacturer. He could tell the year by looking at the date stamps though if he wanted to.

 

JDM SiR-G (JDM GSR) had oil coolers on them for all years just like the 94-95 USDM GSRs and ITRs. That part does not help identify JDM b18c motors.

 

wow, i just purchase my fbp type-r and my motor has red paint. the owner didnt tell me anything about getting a new motor from the dealer or a replacement. he just showed me the carfaxd when he bought the car it was stolen, and lots of parts was missing so it turned to a SAV title. he said the motor is orginal, when i got the car the milages was 55k he said it was orginal.. well i hope the motor was NEW frm the dealers

 

Without opening it up, I would say it could be a Type R. The only visual cue I see is the large cast alloy Transmission brace under the block and oil pan.

 

does the brace really make a difference?