R34 GTT OEM Radiator Cap

[DraftySquash]

Looking to buy a new radiator cap for my Skyline because I think this one is shot. I've got the part# 2143001F02 and it seems this same part is also the radiator cap for the Nissan Sunny B13? 

https://goodstate.com.au/parts/72f01c08ec5ae1878e258c43e35b81aa?srsltid=AfmBOorhguaKBQN0nFfCaM7kjdreG3TrS4nbB3VWZWw8iFXGJtFP-jtw

I mean, the part number matches, so I'm inclined to not overthink it. These are some of the only guys in Aus I could find. Most radiator caps I find are 1.2 and I would feel more comfortable replacing with a stock 0.9 cap. I just wanted to get some kind of confirmation since their website does not show the RB25 or the Skyline as compatible. 🤷🏽‍♂️

[Duncan]

Pretty sure that every nissan, ever, has used the same radiator cap, and it is very common industry wide. The one on my stagea is off a mazda 3.

[Kinkstaah]

I'm gonna go with don't get a radiator cap... get a radiator. You'll need one eventually like any 20 year old plastic heat cycled thing :p

[GTSBoy]

Yup. Drop in Fenix all aluminium. It's painted black, looks good, takes the shroud. etc.

[Watermouse]

I got a Fenix radiator for my ls1 commodore.  I was very impressed with the build quality and it mounted perfectly without adjustments.

[DraftySquash]

OOOO I do like that Fenix radiator. Does it change the capacity of coolant with a different radiator? 

[DraftySquash]

I know this has been discussed before, but I can see the Fenix radiator is 1.1 bar. 
https://fenixradiators.com.au/products/nissan-skyline-r33-gts-t-gt-rfull-alloy-performance-radiator?variant=40947446251678

1. Should I be worried about the extra 0.2 bar pressure that will be going through the whole cooling system?
Car is just a daily, only time it goes over 3K revs is when I'm merging on the highway or sick of being stuck behind a slow car 🤣

2. If I'm so worried, do I just get a 0.9 bar cap? 

[Kinkstaah]

If you want to be pedantic and justify it. Higher pressure means it needs to be a higher temperature to boil over.

In the real world, it absolutely won't matter at all. You can also tell yourself that an alloy radiator can handle higher pressure than one with 20 year old plastic tanks (it will).

[Duncan]

Realistically, the biggest impact of the higher pressure cap in a daily car is a coolant hose that is on its way to failing will happen a little sooner due to potential for extra pressure in the system

[DraftySquash]

On 22/08/2024 at 12:35 PM, Kinkstaah said:

If you want to be pedantic and justify it. Higher pressure means it needs to be a higher temperature to boil over.

In the real world, it absolutely won't matter at all. You can also tell yourself that an alloy radiator can handle higher pressure than one with 20 year old plastic tanks (it will).

@Kinkstaah yeah might just be me being paranoid with how much can go wrong! 
 

 

On 22/08/2024 at 12:49 PM, Duncan said:

Realistically, the biggest impact of the higher pressure cap in a daily car is a coolant hose that is on its way to failing will happen a little sooner due to potential for extra pressure in the system

@Duncan Looks like I'll get replacement hoses for the radiator soon after the radiator then!!! 

 

@GTSBoy Is this the right radiator? It just says R34 and R33 so I'm assuming they all have the same radiator specs? 
I read in a guide that there is a sensor on the bottom left? Do those still fit as well?

Edited August 22, 2024 by DraftySquash

[DraftySquash]

ohhh nvm - apparently that's for the thermo fan.. guess that I will just look past that and pray my engine never gets that hot 🙏🏾

[GTSBoy]

25 minutes ago, DraftySquash said:

Is this the right radiator? It just says R34 and R33 so I'm assuming they all have the same radiator specs? 
I read in a guide that there is a sensor on the bottom left? Do those still fit as well?

It should be. It's the only option (other than the cross flow, which you don't want, and the one with the shroud and fan, which is the same rad underneath anyway).

As to the sensor, I dunno. I think the spot for it is shown blank on their photos. You would be well advised to a) look on your own to see the sensor is there and that you therefore need to accommodate it, and b) ask Fenix what their provision is. You might need to drill and tap the hole, or they might do it on request or as a standard option or a delete option. (Mine is in an R32, so it's not the same thing, and I didn't order it anyway, so I don't know what we did for mine).

[DraftySquash]

problem solved!!! 

[Duncan]

Wow, Christiaan is still there....he was looking after the SAU NSW discounts we used to get in 2010