Jump to content
SAU Community

Will RB20DET Alternator fit RB20e?

dj8684

By dj8684,
in Four Door Family & Wagoneers

 Share

Recommended Posts

dj8684 Contributor

dj8684

Posted
Posted (edited)

Hey guys,

The alternator on my RB20e in my A31 took a crap on me.  My buddy has a spare RB20DET one.  Will it swap over or are we going to end up wasting a few hours to try it to see.  Either way, I'll end up taking the old one out to rebuild it if necessary but I'd rather spend the few hours getting it down to a place to rebuild it rather than finding out the hard way the RB20DET one doesn't fit.

Thanks!

Dustin

Edited by dj8684
Link to comment
https://www.sau.com.au/forums/topic/477394-will-rb20det-alternator-fit-rb20e/
Share on other sites
GTSBoy Grand Master

GTSBoy

Posted
Posted

I can't see any reason why not. The brackets all bolt to the block, no involvement with the head, and the block is the same. The drive belt arrangements on the front should all be same same. Nissan didn't use different shit between different chassis if they could avoid it, let alone on the same basic engine in the same car.

  • Like 1
dj8684 Contributor

dj8684

Posted
  • Author
Posted

Nice!  Well, that certainly gives some encouragement! We're gonna test it out today and I'll share my progress either way.  I know that the alternators have different part numbers from when I looked them up but then again, a lot of parts do even though they're interchangeable.  Let's see what happens!

dj8684 Contributor

dj8684

Posted
  • Author
Posted

So... I can CONFIRM that the RB25DET S2 alternator fits on the RB20e SOHC motor.  Everything was plug and play.  The RB25 one is a bit beefier which is nice so it should provide a little more juice.  The only thing I had to do was buy a slightly larger belt as the one for the RB20e was just a hair too small.

  • Like 2
Ben C34 Grand Master

Ben C34

Posted
Posted
1 hour ago, dj8684 said:

So... I can CONFIRM that the RB25DET S2 alternator fits on the RB20e SOHC motor.  Everything was plug and play.  The RB25 one is a bit beefier which is nice so it should provide a little more juice.  The only thing I had to do was buy a slightly larger belt as the one for the RB20e was just a hair too small.

Good work reporting results, threads with no outcome make baby jesus sad

  • Like 2
  • Haha 1
dj8684 Contributor

dj8684

Posted
  • Author
Posted

hahaha true dat.  I'm actually starting to document all the stuff little by little on my YouTube channel.  I'm gonna start a build thread on here and post the links as a I go.  Sadly, I couldn't film the process on this one because I had to do it in my dark parking garage BUT now that it runs, I can actually take it out in the Sun and start the builds from there.  Here's the build intro vid if you wanna check it out:

 

  • 1 year later...
DevenRFB Newbie

DevenRFB

Posted
Posted

Hey there,bringing back this forum

I have a c34 laurel with a RB20e and the alternator crapped out a couple weeks back. I managed to score a reconditioned RB25DET alternator out of an R33 which fit directly in etc, However it somehow looks misaligned to me. This may have been because i swapped over the RB20e alternator pulley onto the RB25DET alternator.

@dj8684 Did you just install the RB25DET alternator and RB25DET pulley and just get a bigger belt? Cheers.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      RB20DET lean on cold start

      By GTSBoy · Posted

      You shouldn't need to massively fatten up the mixtures for cold conditions. For one thing - 0°C is not that cold. For another, the Haltech will be using the IAT sensor to tell it how dense the air air, and calculate the correct amount of fuelling. Then the cold start enrichment is added as a % on top of that, so it should scale with the main fuelling. You might also doubt the IAT sensor at this time. You're not using one from an RB26 are you? Using a nice Bosch sensor or similar? Happens. Some wideband units take great pleasure in killing their sensors. Put another wideband in the tailpipe and compare. Or just swap the sensor to a brand new one and see.
    • MidnightR32
      RB20DET lean on cold start

      By MidnightR32 · Posted

      Oh, my misunderstand. When the car was running, it sounded ok, but if I gave it any gas it wanted to die but caught itself afterwards. It's very different from how it was a couple months ago when it was warmer outside. The logs show that the AFRs are better during, what I assume, is warmup enrichment. Because it's cold, and air is more dense, should I work on the enrichment bit?
    • A31Skyline
      Rb20e and RB20DET parts

      By A31Skyline · Posted

      yess of course im not using 2nd hand parts from my spare engine, but the place where i live is hard to find parts for the RB20DET ,but for the RB20E is everywhere including new ones and a lot cheaper ,because for the RB20DET you have to order it overseas to get one and it cost a lot of money 3x the price to be exact. so i ask this topic because if i can use the new ones but for RB20E is it compatible or not. if not im screwed haha, not totally screwed but i have to save a lot of money first before i can begin repairing my engine, thanks for the information before.
    • MidnightR32
      RB20DET lean on cold start

      By MidnightR32 · Posted

      Unless my sensor just died, was only a couple months old, I strongly believe it didn't. How can I test it? I never mentioned it being 20:1+?
    • GTSBoy
      Rb20e and RB20DET parts

      By GTSBoy · Posted

      Well, you wouldn't use 2nd hand bearings out of another engine anyway....so just buying the proper bearings is obviously what you're going to do. The crankshaft would be common. The conrods might be common. There is essentially nothing else you would be able to use.
×
×
  • Create New...