water pump queries

[rbs13]

also. n1 pump isnt exactly a bolt on to rb20s. i put one on.. it has a oval hole up top instead of a round one and if you just use a bolt it will leak.. some how ya gotta cover the whole hole up.. i used gasket goo and washers (dodgy i know but it lasted for ages) and it worked..

[(B1) MR_fanny]

thanks for the reply guys....i think ill go for a new RB26dett water pump for my RB25det as i would assume it would bolt straight on unlike the rb30 one thats missin a bolt.

[MonstaS4]

Dunno bout the RB25det, but the RB25de and RB30e pumps are IDENTICAL. There is no difference in impeller design at all. The RB30 pump is not missing a bolt.

[(B1) MR_fanny]

well from what i understand in reading other threads and this is that the rb30 pump doesnt have a top mounting point for the 10mm bolt that the stock item has. then again Mase said that that mounting point is "not slotted" which im not too sure what that means.

[MonstaS4]

Oops......just double checked with a gasket laid over both R33 RB25de pump and Rb30e pump. All holes are there, it's just that one 6mm bolt hole at the top is about 5mm offset on the RB30.

There is definately no difference in impellers though.

[riceline]

When I did my Rb30det conversion the RB25DET Water pump would NOT fit onto the Rb30 block. One of the top left bolts is out of alignment a few mm to the right. I had to use a RB25DE water pump to make it fit onto the 30 block.

[(B1) MR_fanny]

yeah tahts what i was talkin about guys:D i just want something thats better than stock RB25det unit and will fit properly. does anyone know if the RB26dett unit will fit?? i dont see why not??

[MonstaS4]

riceline - that's odd. Looking at these pics, the RB25de pump would not fit the 30 block. The gasket is RB30.

B1 - It's only circulating coolant. Nissan would have spent $$$$ on R&D to ensure the rb25det unit was up to the task. I wouldn't think it's a critical issue compared to say an oil pump.