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Taking Apart A Rb25 Neo

Cjmartz2k

By Cjmartz2k,
in Engines & Forced Induction

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Cjmartz2k Proficient

Cjmartz2k

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Started to finish taking apart the rest of this Neo motor today. It came out of a automatic Laurel, not an R34. Anyways, had a few surprises. Head was solid lifter'd as I thought, and I think it has the bigger RB26 sized rods (you tell me) but the crank.........dscn2815.jpg

dscn2816.jpg

I thought Neo's had the "fixed" crank collar? Does anybody have a picture handy of a long collared snout? This isn't one, right?

And here's some pics of a rod. Looks thicker than normal, right? Just want to make sure since I don't have one here to compare it too.

dscn2817.jpg

dscn2819.jpg

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Bluprint Veteran

Bluprint

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I've had my Neo rebuilt (It's from a 6/98 R34 GT-t), it did have the RB26 style rods and solid lifters but didn't have the fixed crank snout as you have also just discovered. Had a Pro Engines Jun copy crank collar made up and fitted for it, which you could also get done.

Cjmartz2k Proficient

Cjmartz2k

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This is just a parts motor, so I'm not really trying to spend any money on it. I just thought I'd be getting a fixed crank for parts too and I was a little disappointed. Thanks for the confirmation on the rods and the crank though guys.

Strange. Everything I've read on the internet says it should have the fixed snout, RB26 rods (which it has), solid lifters (which it has), and the head is the same as the n/a neo motor, but the first one I had which came out of a R34 n/a car was way different from this turbo motor's head.

Bluprint Veteran

Bluprint

Posted
Posted

I was also under the impression that R34 Neo motors were supposed to have the fixed snout, but after further investigation (and having a motor pulled apart :() I discovered that it's only really late model R32 and R33/34 RB26's that have it.

Cjmartz2k Proficient

Cjmartz2k

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Yeah, I think that's the case. I wonder where that mis-information came from? I'm not actually to worried about it though. After all the talk about needing one I see on the internet, I don't actually know of anybody in person or even on the internet that has had a motor die because of it. I see RB26's die of oil starvation, but always due to the crappy oil pan design, not the crank collar.

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