corbic

Rods are still in the engine. So I can't get a surface shot to show how wide they are, only the side profile and top cap.

I have an RB25DET NEO from a Stagea. I'm told NEO's have RB26 rods. Are there identifiable casting numbers? Numbers I see on the caps is 14 - 0 (NISSAN LOGO) 3

I've been trying to do some research and there is not a lot out there. I've seen the following comments. RB25DE Neo (Non-Turbo) has a different head casting with smaller intake ports. The valve springs are "weaker" and the exhaust cam is different. Different injectors, 10.2:1 vs 9:1 compression (different Pistons) . I can visually see the intake manifold is completely different as well as the crossover and throttle body. I've seen a comment the DE block lacks piston oil squinters. Can anyone confirm the following? Block castings? (ie will a DET head swap to a DE block or something weird going on there) Crank? Rods? (I always hear the NEO DET has RB26 rods but have never seen a photo to prove it) IVAC unit? CAS? What is the Ring and Pinion for the AWD models?

As you can see the Pan's are completely different. The RB25 pan is a different bolt pattern and the axle tube + differential are mounted forward. The Axle is nearly touching the oil sump and there is an additional 3 inch gap between the differential flange and the end bellhousing plane.

Shims are unique to the GTR/Nissan. A local shop may determine that a longer sleeve is needed, but they are not going to be able to call up NAPA Auto Parts or a Nissan Dealer and pick up a sleeve. Also, looking at the FSM - it looks like there is a pressed on bearing for the Snub - sooo I doubt any shop is going to have a dummy bearing to get the initial depth without having to press on - press off the bearing a dozen times. $150/hr experimenting with all this is going to turn into a $2000 shop bill real quick if I went that route.

I'm state side, so while I have two great diff shops near by, neither is going to stock GTR/Nissan shims.

Did you swap the Ring and Pinion? How much a PITA Is it to shim the front differential. From what I can tell there is two thrust washer with 6 various sizes each for sides and two washers with almost 10 each options for the pinion depth along with a pinion sleeve that comes in 6 sizes. There is almost 1.65mm of depth tolerance stacking and with each of these washers/shims running for $5, that's almost $500 to get enough to play whack a mole with setting up the R&P pattern.

This is Rubbish information and basically screwed up my build plans. RB25DET (Neo) does not use the same AWD oil pan as the RB20. The Pan's do not swap. Bolt holes are not aligned. I'll have more photos when I pick it up from the shop. So to be specific as possible, since every thread I find about this information is vague and useless. 1989 GTS-4 Coupe - AWD - Turbo RB20DET 5spd Manual. Engine - RB25DET NEO - Stagea - most likely automatic car. Car in Question Engine RB25DET NEO AWD PAN RB20DET AWD PAN

What adjustment needs to be made when using this?

And pulling the engine means either separating it from the transmission, engine out the top with hood off, or dropping everything out the bottom by removing the front suspension.

Thanks

Is it possible to pull the oil pan with the engine in the car? I've not found any videos of photos of someone doing it.