Someone PLEAE HELP!!!! I and am wiggin out.

[Miata Master]

Ok am trying to put my engine (r33 rb25det) in for s13. Now here is the F'ed up thing. the valve cover says 2500 Duel overhead cam. The from timing cover does NOT say RB20 it is flat. but I finally got to look the engine brace?, the part between the motormounts and the block. They are the same as RB20 i swear. They look light plate steel and end with and angled face. while the ones I thought rb25's have are cast and have horizontal ends. and will post a pic as soon as i get my friends digital camera. the mounts I got from Mckinney wont work.
Modified by Miata Master at 12:21 PM 2/12/2005

[Miata Master]

I am 90% sure they are rb20 braces. or whatever they are called. so now my motormounts dont Work.

What I really would like are differences in the 2 different blocks I can look for the place i bought from has been taking me through the wringer as it is and it wouldn't surprise me if they swapped the from cover and valve cover, if it could be done. thanks sorry if this is a stupid question.
Modified by Miata Master at 12:31 PM 2/12/2005

[yellow_jacket]

Does it have a RB20 transmission or a RB25 transmission on it? Because the are two different sizes. Also, the block mounts on the 20 are steel. The 25 block mounts are cast aluminum.

[Miata Master]

I have just been assuming the trans was 25 but how can I check. the shifter is gone not just the knob the entire shifter. yah the block mounts are steel. which means no matter what my engine mounts won't work they are to match the cast aluminum.

[kouki-gymkhana]

Where did you get your engine from?

[Miata Master]

JDM powerplant / Mitsuparts it is the same place.

[BoostFab]

can you post some pictures?

[Miata Master]

I'll post pics as soon as i can borrow someones camera though I am sure am pretty sure now that it is just rb20 blcok mounts or maybe even aftermarket 240 mounts. I am writng a letter to JDM about this so It should get resolved soon I hope.

[JonPowell]

I told you on your last post that a picture was worth a thousand words...take a hint

If your S13 driveshaft fits into the trans its an RB20 trans

Check the block on the AMERICAN drivers side near where the trans bolts up. There will be a flat portion of the block that has the motor series engraved into it. it will say "RB20" "RB25" or "RB26"

There are different kinds of RB25, but the mounts that bolt to the block ARE welded formed sheet steel(havy gauge but still sheet metal)

[Carl H]

mebey they pulled a quick one on you and gave you an rb20 instead.....if the intake manifold is quite wide i would have to say its an rb20 as the rb25 one is significantly narrower.also you should have a cluster**** of wires and plugs near where the upper radiator outlet is, if you dont then again its an rb20.

*EDIT*the fact that you said that the front timing cover is flat says in its self its an rb20 as the rb25 has a bulge infront of the intake cam for the vtc solenoid.
Modified by Carl H at 12:12 AM 2/14/2005

[Miata Master]

It does have the bulge for the Vtc, when I said flat I meant it didn't say RB20.

I am trying to get the pictures I dont have a digi so it is hard.

[Eikon]

There are some RB20's that don't have RB20 written on the timing cover.

Can you see what color the injectors are? I think each engine has a different color?

[BoostFab]

i have here a rb25 shortblock, and it clearly has "RB25" imprinted on the rear-left-side of the block. look around there.

look at my attached picture.

[driftjunke]

Are the injectors side feed or top feed?

E

[BoostFab]

sound like a r32 rb25det...if you want to be more sure, pull the head and measure the cylinder bore

[AmoebAssassin]

Did the R32 ever come with an rb25? I was under the impression the rb25 made its debut with the r33...

[JonPowell]

R32 RB25DE no VTC

R33 RB25DET w/VTC

Could be an RB25DET from a Stagea?

[420_240]

Weirder sh_it has happened....My clip was an r32 front clip....Motor was mounted with black steel block adaptor plates (supposed to silver aluminum)Plate on the firewall even says it's an rb20det r32...But the motor is an rb25det (production date 8/96)Don't ask....

[BoostFab]

Weirder sh_it has happened....My clip was an r32 front clip....Motor was mounted with black steel block adaptor plates (supposed to silver aluminum)Plate on the firewall even says it's an rb20det r32...But the motor is an rb25det (production date 8/96)Don't ask....

later years of the r32 does have option for rb25de(t). the previous owner might have swaped out the rb20 with the rb25, that's why you see the rb20det plate on the firewall. either way, the rb25 is better

[FAST-DATSUN]

If you need to exchange the engine mounts because some one switched the alun/steel engine brackets I will swap them out for you. one you figuar out what you have...

[420_240]

later years of the r32 does have option for rb25de(t). the previous owner might have swaped out the rb20 with the rb25, that's why you see the rb20det plate on the firewall. either way, the rb25 is better

That's what had to have happened... I ended up sourcing aluminum block adapters from venus-auto.com... I tried several other sources but no one could come up with anything..

[JonPowell]

The R32 NEVER had the turbo RB25. It was swapped into the car. Americans arent the only ones who think of swapping motors. There are ALOT of R32 GTS-T's running around with R33 RB25DET motors.

The R32 RB25DE was NEVER turbo and did not have the VTC.

[BoostFab]

The R32 RB25DE was NEVER turbo and did not have the VTC.

that's right jon. the r32 has the rb25de. the person must have swapped in the DET....

[yellow_jacket]

Weirder sh_it has happened....My clip was an r32 front clip....Motor was mounted with black steel block adaptor plates (supposed to silver aluminum)Plate on the firewall even says it's an rb20det r32...But the motor is an rb25det (production date 8/96)Don't ask....

So people use the RB20 R32 mounts to bolt RB25's into the R32?

[420_240]

So people use the RB20 R32 mounts to bolt RB25's into the R32?

I have no idea... but if you want pictures of the steel block adaptors i can take them and post them here... and trust me... they DO NOT work with mckinney mounts.. aint happenin.

[yellow_jacket]

I've got the block mounts for the RB20 and the 25 so I know what you are talking about. Thanks though.

[Miata Master]

Finally got a pic.and what senor is that in the second picture It is stripped COMPLETELY round. any hints on how to remove it if I have to.
Modified by Miata Master at 8:57 PM 2/15/2005

[Miata Master]

Dont know what this is. (sensor)

[420_240]

Yup you have the steel block adaptors... If you are going to use Mckinney mounts you'll definately need the aluminum block adaptor plates... The angle of the steel adaptors is WAY off... I got mine from venus-auto.com.Otherwise goodluck with your swap

[accel junky]

I don't have the Rb25 code on my block or any code for that matter, weird.