VL water pump a direct replacement for R33?

[benl1981]

Just wondering if the VL water pump fits a series one R33 RB25DET...

some threads say it does others don't.

Anybody know prices for an RB25DET suitable pump. Anybody know a good aftermarket product and price? What is Nissan worth...?

[4door_Sleeper]

Just wondering if the VL water pump fits a series one R33 RB25DET...

some threads say it does others don't.

Anybody know prices for an RB25DET suitable pump.  Anybody know a good aftermarket product and price?  What is Nissan worth...?

I believe they look the same, but one of the holes isnt in the correct place.

Dont try and scrimp money here, get the timing belt, pullies and pump replaced at the same time by a workshop with experience. Check the forums and you will find horror stories of where this simple repair has destroyed engines.

[Bluprint]

I am of the understanding that all RB engine water pumps are the same except GT-R N1 water pumps.....

I could be wrong though

Either way I have an RB30 one on my RB25DET Neo, it's amazing the price differences you get when you walk into one shop and ask for an R33/R34 Skyline water pump, and then walk into another and ask for a water pump to fit a VL Commodore/R31 Skyline

[benl1981]

Would the peak rpm change the rating of the pump, I mean I don't want to put an RB30 one on and find it doesnt last due to it not being designed to take 7000rpm. What are good aftermarket ones?>>?

Thanks

[gtst25]

I doubt that if you've got a turbo series 1 rb25 the rb30 pump will fit.

I tried this on mine but I found like 4 door sleeper said one hole is different.

I'd go genuine if I were you.

You can save money on the idler + tensioner pulleys though - I went to a local bearing shop that deals with NSK bearings with the part numbers and got the right ones much cheaper than nissan.

Part numbers

Tensioner: NSK 60TB0683 EA7L 806

Idler: NSK 56TB2801B01 ENSL 309

[Fitzpatrick Speed Works]

All RB series pumps are exactly the same. Even the r32 N1 is the same the only difference comes in r33 N1 and r34..... Someone mentioned about the fact the rb25-26 revs higher that isnt a problem as the speed of the water pump is dictated by the size of the pulley and you will notice that the rb30 front pulley is way smaller... I have always used rb30 without a problem...

[benl1981]

Hmm - conflict... I have a series 1 R33 RB25DET so I'm not sure. Probably like wahat gtst25 is saying it may not be a driect fit. Will have to download FAST - woudl that help clarify?

[OFENSV]

i put a rb30 pump on my series 1 rb25. there is on smaller bolt which is slightly different, i just left it out. had no problems so far

[benl1981]

Nice - does it come with a seal or do you gasket goo it on. Probably silly question, but you would wnat a good seal there, the missing bolt doesn't affect this?

ABout how much did the pump cost??

Thanks

[SteveL]

All RB series pumps are exactly the same.

No they're not - and I'm speaking from experience. For example R33 GTR pump does not fit R32 GTR without modification (more or less substantial depending on your welding/machine shop abilities). Also RB30E WP has less vanes on the impellor than RB26 type, which means it shifts less water per impellor revolution. I suspect the greater number of vanes on the RB26 WP is due to the increased demands of the water cooled turbos.

That said, I suspect an RB30 pump would bolt straight to an RB25 and if people that have done it are reporting no problems then that's a good sign.

[gtst25]

I too like Steve am talking from experience as I do all the work on my cars myself.

The pump fitted BUT as everyone else here has confirmed there is one bolt hole thats different. I didn't put it on because of this. I'd hate it to start leaking.

Something else of interest - the rb30 one fits on a rb20 (did it on dad's) - just am unsure of how it would handle the revs - doesn't matter with dad as he rarely revs it over 4 grand.

[SteveL]

The pump fitted BUT as everyone else here has confirmed there is one bolt hole thats different. I didn't put it on because of this. I'd hate it to start leaking.

Interesting....in that case I'd also recommend not using the RB30 pump. The bolt is there for a reason and leaving it out increases the risk of a leak.

[benl1981]

Somebody here was saying aftermarket have slotted hole to allow for both..wnet to supercheap and had a lookk at the powermax one but it only had the hole for RB30.

[cowie165]

Ben what did you do in the end? Did you end up checking FAST?

Mark

[benl1981]

I think the pump ending in U26 was the correct one for Series 1. The VL pump didnt suit. My pump was in fine condition so Didnt bother replacing. I think the U26 pump was about $125 trade from nissan. I replacesd belt myself so if the pump does go before next belt change not a huge deal. The one in it now could last longer than a new one you fit, thats if you get a dud..

Cheers

[Duncan]

Dunno about the rb25 but an rb30 pump fits and works fine on a 32 rb26 we run one on the race car

[cowie165]

Thanks Ben, thanks Duncan. Duncan it looks like your yellow bandit clears up the "VL pump will not cope with the high-rpm application in an RB25/26".

[SteveL]

Dunno about the rb25 but an rb30 pump fits and works fine on a 32 rb26 we run one on the race car

The important thing to note here is 'race car'. The RB30 pump has less vanes in the same way as the N1 pump so would probably better (at least in that way) on a race car where sustained high rpm would be the norm as opposed to a road car. OTOH, the RB30 pump does not have the anti-cavitation plate which is there for a reason on the N1 pump.

In the same way, the RB30 pump has less vanes than the stock RB26 pump and there's no doubt Nissan have done that for a reason - probably differing flow issues - and personally I'd rather stick to the correct type that being the case. That said, if people are not having problems with the RB30 pump that's good, and at the end of the day it's a personal choice.

[ylwgtr2]

after market number for a VL waterpump is CP898...the number for RB25/RB26 is CP900

[cowie165]

Steve you've just reopened the can of worms

Grrrrr. I guess my wallet will do the talking when the motor comes out in a few months.