PW180SX

Hey guys,

Alight, so I purchased an RB25DET with transmission from Tiger Japanese, got it in and here is what it is. At first glance all wrapped up, looked just like a regular RB25 to me.

Took it to my warehouse, and started to look into it. I had already purchased an RB25 freddy intake manifold for it, so I started with that. First things I notice is the AAC sensor is 4 bolt, not 3 bolt like RB25's. Second, the throttle body is smaller and wouldn't fit even with the adapter plate. Then I take the entire manifold off the RB25, and notice...it doesn't line up at all. Then I noticed it doesn't have the hump on the VC's for the VVT, nor the front cover. It looks exactly like an RB20 head...but why is it on an RB25 block? Is that even possible? Or did Nissan have an old version of RB25 that didn't come with VVT? Any input would be greatly appreciated.







(shitty picture of the stamp, but it says rb25)

S12 Drifter

sorry to say it looks like a RB25DE with turbo stuff on it, as far as i know only RB25De's came with no VCT

either that or it's a RB20 with a RB25 spark plug cover. what does the block stamp say on the exhaust side near the bottom transmission bolt? RB20? or RB25?

EDIT: OP looks a lot like a RB20 put it back together and give them a call asap.

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240boi115

wow looks like you got screwed over....^^^^agreed an rb20 put together to look like a rb25. now ive heard it all.

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my 240 broke down..again

PW180SX

That was my first guess, but the block stamp is infact stamped RB25. I have a picture up, it's kinda shitty sorry. But yeah, doesn't say RB20 anywhere on it. Is there a way I can identify the head? Maybe a serial number or something?

S12 Drifter

if thats the case it's probably a RB25DE converted to a turbo.

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hobbs

Wouldn't put it past TJ to slap a turbo setup off of a bad motor onto a regular RB25DE.

S12 Drifter

i wouldn't trust them at all.

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Bmxer300zx

Wow
That must be a r32 rb25de, the r33 had a bulge on the cover for the nvcs. Whats the turbo say for a marking? 16v or 45v?
You sir have a rb25de+T conversion it's actually quite popular oversea's
I'd call and ask they probably just looked at the block# and saw it was turbo and assumed I highly doubt they went through all that trouble to swap everthing around.

Bmxer300zx

I looked quick, I troll this forum alot and hear talk of what you have.
Basically if your rb25det plenum doesn't fit you have a r32 rb25 it uses the same intake manifold as a rb20 but... the intake ports are bigger for the rb25 so even buying a rb20 aftermarket manifold will require a bit of "porting"
intake swap
^^(read 3/4 way down)^^
I'd call and demand a return with the exchange of a neo6 motor to make up for the fuckup

S12 Drifter

+1 for the rb25 neo

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PW180SX

Hmm, alright thanks a lot guys! Definitely helps knowing what I got. Tiger Japanese replied with this to my case:
"The buyer can open a claim on our website at JDM Tiger Japanese Claims System we will send him the parts which has been damaged on the shipping."

haha, I'm not asking for a replacement on the damaged parts. I want what I paid for. Bmxer300zx, thanks for that link. I did so a few image searches before and the head does look exactly like an RB20 head, which had me guessing.

I'll see what I can get from them, and keep this thread updated.

S12 Drifter

next time you buy a RB fork out a little bit more money and get one from Raw brokerage if shit flew like that from RB people would get fired.

they even supply you with parts if need be to finish swap. Take this as a lesson learned. do research on who you're buying from, knowledge is indeed power. just do a quick google on tigerjapanese reviews and you see some pretty bad reviews.

i even saw one post someone bad where someone stuff a rag in the cylinder block for a honda meaning it was taking apart forgot and left.

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Bmxer300zx

It's understandable most don't relize there was a na rb25 for the r32 they look close to a rb20, even the r33 na rocker covers are flat versus the turbo raised back. The thing that had me scratching for a few was no nvcs bulge or the rb25det intake manifold didnt fit. I didn't know it right off but when I sourced a forward plenum for my rb20 a while back I stumbled on that and remebered lol.
Btw what turbo does your motor run? Im curious if its a rb20 or 25. The rb20 was a 16v, the rb25 was a 45v.

Bmxer300zx

This is why I pickup my swaps, luckily I'm close to 4 places I usually get a motor that hasn't been pressure washed yet and make sure all electrical and wiring is good as well. Lol alota those guys have no idea what they're looking at in there, they're there for a pay check

S12 Drifter

yea agreed. before i bought my RB20 i did months of research just to know what i was getting my self into. when i went to pick it up looked exactly the way it was suppose to and checked out. only thing that threw me off was the head gasket. turned out it was a race motor in japan, acl main and rod bearings with arp studs and 1.2mm H/G.

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PW180SX

Indeed. I did quite a bit of research on RB25's, just not the rest. I googled reviews, and read good ones and bad ones, but that was about every company I searched for. Oh well, lesson learned.

Tiger Japanese replied with this on my case:

"The right engine has been sent, but looks the buyer has changed his mind and looking for something which we do not know what that is. VVT does not come in RB20, RB25 and RB26. The buyer must return the item in original condition with in 10 days. The buyer will also pay %25 restocking fee."

Then they escalated it to a claim, so I am unable to reply..

Also, I'll check and see what turbo it has once I'm off work.

slideslidegnarslide

Don't pay them a cent! They tried to rip you off. That wasn't done by mistake those guys know what is what. Send engine back and get new engine at no cost to you or lawyer up and screw that shitty company over.

hobbs

25% restocking fee on their fuckup? They didn't even use lube on that one...

S12 Drifter

Theres nothing wrong with the NA RB25DE you have but it is kinda a low kick in the bawls it's not what you paid for.

you can use a VVT cam from a 25 and all that but it's a problem that should not have existed. all RB25's came with VCT except the N/A's. you can get a machine shop to drill a external oil tap for the VCT cam operation.

if you dont want vct and can live with a little lag then just deal with it. worse comes to worse you can swap a 26 or 25 head on but again it's a problem that should not be there anyway.

O.P how much did you pay for the RB?

I would assemble the motor and seek legal advice.

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ThirtyTwo

Early rb25det engines came without vct; that's probably what you have. Tiger Japanese didn't fuck up, they just gave you an older engine.

S12 Drifter

show factual information please, I'm curious about this.

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Bmxer300zx

As far as I was aware there was never an rb25deT only the na version in the r32 as soon as the r33 came out any edition rb25 after was with NVCS.

Bmxer300zx

Also they're idiots because its easy to see the rb25 r33/34 has nvcs also the RB20 NEO6 Had nvcs as more

R_34

Check the casting number on the head.
It's on the exhaust side beyond N°1 cylinder.

08U-# : R32 RB25DE.
73L-# : R32 RB20DET (maybe DE too ?).

ThirtyTwo

It is factual information. If you would like to reference my original sources then I'm sorry to say I can't recall where I originally found this information. But a quick Google search shows this thread (post #6) that backs up my statement Variable Cam Timing (VCT) - RB25DET




The wiki page on rb engines also mentions that they didn't introduce vct until August of '93 which supports the idea that R33s manufactured before August '93 would not have vct.

wahhpshh

wouldnt injectors/fuel rail also be a heads up since the rb20 is a top feed and 25 is side feed? i couldnt notice in the picture with all the hoses/sub harness' blocking view.

R_34

An other strange thing. Your RB25 doesn't have an oil cooler.
To my knowledge all RB25DET got one.

@wahhpshh
You can see this one use top-feed injectors (pic n°3 ).

S12 Drifter

Ahhhh! okay thanks! I was not aware of that! helps to know that piece of info.

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wahhpshh

i couldnt see that well from my phone. but now i notice on my pc.

PrimeDirective

Wow, what a mutant RB.... at least you got a RB25 transmission.

I wonder what MAFS and ECU it uses.

Send that shit back, even if you pay 25% restocking I think the headaches this thing is going to cause you would be worth it in the long run.