water pump queries

[Mase]

I was told the vl (rb30) water pump fits the rb25's, but i was just wondering if anyone knew if they fit the rb20det as well??

Also, can anyone give me a quick run down on removal and install of a water pump.

This is how i see it,

*use white out to mark where cas sits on timing cover as i don't have a timing gun

*remove cas

*remove timing cover

*mark appropriate spots with white out so timing belt goes straight back in original position

*remove water pump after draining coolant system

*clean around the area with a rag etc and apply gasket with some gasket goo (any suggestions? )

*install new water pump

*put timing belt back on inline with white marks

*put all covers back on

Any suggestions/tips etc would be great.

cheers

Jayson

[51jay]

They may look the same but they have different Nissan part no. so they are not actually the same, and ...no...I don't know what the differences are but I would only put an RB25 DETpump on my RB25DET

[knore]

Just get an N1 water pump, genuine nissan.

About $170 if i remember correctly

[Mase]

I just checked on meggala's web page and found that the rb30 water pumps do fit the rb20det so i have picked up one for my rb20det. Can anyone give me a quick run down on the process???

Cheers

Jays

[rb25]

I wouldn't use an RB30 pump, go for the hi-flow N1 pump.

-rb25

[Sydneykid]

The N1 pump is actullay low flow, for sustained hi rpm.

[Jay95R33]

Doesn't the RB30 water pump have one less mounting/bolt hole ??

Just something that I've heard but hasn't been confirmed.

J

[Mase]

I reworded my search and got a few more results. So far i have removed mostly everything except for the harmonic balancer. I've cracked the centre nut but now need a harmonic puller to remove it. I paid $74.50 for a rb30 water pump (Protech) and had some gasket goo around so all up it should hopefully only cost me $74.50.

Joel the rb30 water pump seems identical to me. The only difference being that the top 10mm bolt hole is not slotted like the nissan one.

Cheers

Jayson

[rb25]

The N1 pump is actullay low flow, for sustained hi rpm.

oops

sydneykid -> :slap: <-rb25

[predator]

There is a "powermax" one for like $80 from some parts places I've noticed (supercheap, etc).. Fit sheet says RB26DETT, RB25DET, RB30E, and RB25DE so if you ask me that sounds universal

[Sydneykid]

There is a "powermax" one for like $80 from some parts places I've noticed (supercheap, etc).. Fit sheet says RB26DETT, RB25DET, RB30E, and RB25DE so if you ask me that sounds universal

They missed RB20DE and RB20DET and RB30ET. :slap:

[Sydneykid]

oops

sydneykid ->  :slap:  <-rb25

Well at least it wasn't ..........

sydneykid -> :kick: : <-rb25

[Col-GTSX]

So it is confirmed the rb20det motor will use an aussie delivered r31 skyline rb30 water pump....

[Sydneykid]

So it is confirmed the rb20det motor will use an aussie delivered r31 skyline rb30 water pump....

Yes, definitely, absolutely, not a problem, all RB water pumps are interchangeable, go for it, let 'er rip, whack it on, bolts straight up etc etc.

You need to be aware that while they fit, there are slight differences in performance.

The RB20DE pump flows slightly less water at all RPM's (smallest engine, needs less cooling).

The RB26DETT pump flows slightly less water at high rpm (stops cavitation).

The RB26DETT N1 pump actually flows less than the standard pump for sustained high rpm use (racing). :idea:

The RB30E and RB30ET pumps are not designed for sustained high rpm (over 7,000 rpm), they are SOHC remember.

The RB20DET and RB25DET pumps are pretty similar in flow, but the impellers look different. :confused:

I think the RB25DE pump is prety much the same as the RB20DE pump but I haven't had them side by side to compare.

Hope that helps

[MonstaS4]

The RB30E and RB30ET pumps are not designed for sustained high rpm (over 7,000 rpm), they are SOHC remember.

Just to confuse the issue further, i have both RB30E and RB25DE pumps sitting in front of me, and they are identical.

[BU5TER]

So what would be the right choice of water pump for a lower rpm 800hp Rb30/26

[Sydneykid]

So what would be the right choice of water pump for a lower rpm 800hp Rb30/26

Standard RB26DETT would be my choice. There is one on my RB31DET, so I guess you could say I have put my money (or faith) where my mouth is.

[(B1) MR_fanny]

sorry for digin the thread up again but im in the process of upgrading my water pump and have a few questions.

i wanted to upgrade to the N1 but syd kid says there is less flow than standard so does that mean for daily use and the occasional track/drift days its not worth it?

does the stock RB26dett water pump flow better than the stock RB25det??

[(B1) MR_fanny]

anyone??

[Sydneykid]

anyone??

Maybe I am the only one who has compared them, but the spec sheet confirms it. The N1 water pump is specifically designed for continuous high rpm use, so it doesn't cavitate. This means it pumps less water around at lower rpm. So if you use your RB26 a lot (only) on the track, an N1 water pump is maybe worthwhile. But driving around the street it will be a handicap, maybe on hot days with the aircon on, in traffic. The RB30 pump is much better for this as it was designed for lower (average) rpm.

That's all for me :birdie: