Water Pump Replacement Rb25De+T

[WYTSKY]

Hey guys,

opened the bonnet the other day when doing my 3000km oil change to see my coolant reservoir was bloody low. Decided to drop the coolant and put fresh in, not sure if it has been because of the hot weather of late or

because of the coolant but water temps were a little hotter of late: 2-4 degrees... all went well, ran all the air out, job done.

Open up my garage today to see a huge pool of coolant under my car.... got under there and nothing from around the turbo, checked everywhere etc/...

Couldn't see anything from the water pump because it had the cover over it, anyway found this little pool drippinglower down from around under the water pump area, so I am quite sure it has gone..

questions - 1. Will an N1 water pump fit my rb25de block or just go the standard rb25 pump?

2. If an N1 pump will fit, based on my power, and the fact that with the slightly higher compression my motor can suffer badly from heat soak, is an n1 water pump worth it or is it not even noticeable?

bloody annoying as I got my mechanic to do my timing belt (do most stuff myself but don't want to screw something like that up) 10,000kms ago as I was coming up to 200,000km, I am 400km off 200K and it has gone :@

Thanks

[boostn0199]

If your not tracking the car no real point of putting the N1 in as it is made to help at higher rpms so on the street and in traffic you would be better off with a standard one.

[WYTSKY]

ahh cool, car is 100% street, in future would like to occasionally get it on the track. good to know the difference, thanks.

I was just wondering if the n1 pumps more water around or something along those lines to help stationary heat

[ssxRicho]

N1 pumps less water a low rpm. So not great for traffic. More at hIgher rpm.

[WYTSKY]

Thanks John.

Searched abit more and have come across this.

Standard looks like it will do just fine.

Thanks.

http://www.skylinesa..._1#entry4782752

[JonnoHR31]

standard genuine pump with decent quality gasket silicone around it

[WARLORD]

n1 are just fine on the street,get a nismo thermostat as well if you can,my street driving temp in summer is never more than 78 deg even on a real hot day winter sits around 68-70 deg.

in the end get what you can afford or plan for your future mods.my 5c as

[JonnoHR31]

no and no

a n1 pump might work fine for most people but unless its a dedicated track car its a step backwards, a standard pump will work better in a street car, even one that sees track work.

those low temp thermostats would have to be the worst thing nismo has ever made, again a standard thermostat works much better all round, even for track cars. the standard ecu and 90% of aftermarket ecu's dont get out of cold enrichment until 80 deg, so having a low temp thermostat simply keeps you in cold enrichment longer and sometimes forever (winter nights) without actually helping to stop overheating at all. if your car overheats with a standard thermostat (provided its working of course) its still gonna overheat with a nismo thermostat.

Edited January 2, 2012 by JonnoHR31

[KiwiRS4T]

^^^what he said. N1 pump is made to cope with high revs so not so good for normal use. Most journeys are less than 10km so an early opening thermostat just means it takes longer to get to proper operating temperature (or often never does so oil beomes more diluted). And once the thermostat is open it makes no difference to the cooling ability on a hot day or on the track.

[discopotato03]

I think the first thing to consider is what fits because I'm under the impression that VCT RB25s use a different water pump to the fixed cam timing ones .

Check it out , cheers A .

[KiwiRS4T]

There is a universal aftermarket one that fits all - there is a difference of a bolt hole which can be covered by the gasket and gasket goo with no leaking.

[KiwiRS4T]

Here's a genuine one:

http://www.kudosmotorsports.com/catalog/nissan-water-pump-genuine-nissan-skyline-r33-gts-gts4-gts25-rb20e-rb25de-p-586.html

You can get cheaper but its half the price of an N1 pump.

[WYTSKY]

Cheers guys,

Price was not really the issue, was the question of what will be more suitable.

I have looked on Kudos, there is also frsport but they are american so long time deliveries... but the thing that has put me off them is the postage... http://www.frsport.c...B26_p_9422.html

I don't remember it ever being that bad from frsport previously, but $211 for 2-3 days or $140 for 2-5 days to my door is ridiculas, the part is only listed on there for $100, so I will by from somewhere in aus like kudos.

Next thing is installing it - I do work on the car myself a fair bit, but I am not confident with removing the timing belt and lining everything up perfectly, so will take it to one of my trusted workshops, it is about 10 mins drive but based on the fact that I am losing > 1 litre a day without the motor running I don't think I want to turn it on again, thinking tow truck....

[JonnoHR31]

aslong as you top it right up and take some water with you it should be fine to drive there, just keep a close eye on the water temp with the power fc

[BRUNSKIGTST]

make sure that the coolant that came out is overflow, because my resorvoir is never that full if any and my temp is always half way at the right temp. and there is water in my radiator. just to double check you might be spending money for nothin. unless temp is too high once its hot then its pump.

[WARLORD]

this is keyboard mechanics with there internet degrees at its best, again nissan could learn so much

I LOVE THE SPIRIT BOYS.

Edited January 6, 2012 by WARLORD