What Radiator For Rb25 240?

[GregTas]

Hi,

 

Does anyone know of a radiator with both pipes on the RHS that fits in a 240? I need one for my RB powered 240.

 

This one looks perfect, but it's in the US and would cost me $500 landed here.

 

https://www.ebay.com.au/itm/Aluminum-Radiator-For-70-78-Datsun-240Z-260Z-280Z-RB20DET-RB25DET-KA24DE-MT/330619828554?epid=658082338&hash=item4cfa7a394a:g:DvkAAOxyOMdS4wik

[ScottyD]

You could have the original modified like mine, never had an overheating issue. I’ve heard mixed results with the Aluminium radiators.

Edited May 6, 2018 by ScottyD

[GregTas]

Unfortunately I don't have an original L radiator. If I have one I probably would have modified it like you have done.

 

I found this one which looked like a good fit, but being for a smaller engine I wondered if it would be up to it. Although it doesn't look smaller than the L series.

 

https://www.ebay.com.au/itm/Aluminum-radiator-for-Nissan-SILVIA-S13-CA18DET-Manual/253549599350?hash=item3b08bbda76:g:I~sAAOSwUN9aysYK

[gav240z]

Maybe speak with PWR they do custom radiators etc..?

https://www.pwr.com.au/#

[GregTas]

I contacted PWR and they do a radiator for an RB 240z, but the quote was $1800 with fan, or $1200 without. I might be a bit tight, but $1200 still seemed a lot to me. The US option looks quite cheap now. My only concern is with the overseas postage and radiators being a bit fragile. 

 

I'll keep looking for options.

[gilltech]

Just find a 240Z or early 260Z radiator and have it rodded out or recored if necessary and while the top tank is off have the inlet/outlet relocated to suit. Then it's good for many years to come.

[gav240z]

Yeah the other option is to look at a radiator that is about the stock size and then have brackets fabricated to work with the stock mounting points? Someone who is good with TIG welding should be able to do it.

 

Not sure what the mighty car mods boys did with their RB26 conversion? But it looked like it mounted up to stock mounting locations.

 

I've got a Koyo Radiator on my FD RX-7 - rotary's get real hot and so you have to make sure you have good cooling on them. I've not had any problems with it and it was around 300-400 euro when I bought it (was living in Europe at the time). I'm sure you could find a nice Koyo that would be a good size and just modify mounting points to work. I agree it shouldn't cost $1,200..

 

I generally like to support local companies over ones that make products cheaper in Asia.. but in some cases the price difference is hard to ignore.

 

I don't know dimensions off the top of my head.. but you can see a few examples here.

http://www.koyoradracing.com/products/radiators.asp?make=Nissan

 

The other option would be to look at modifying the stock radiator as mentioned to accept more cores. I had Alexandria Radiator service modify my 240z radiator by keeping the end tanks and using a new core (three core over the old 2 core), price was reasonable at around $300.

http://www.alexandriaradiatorservice.com.au/

 

The guy working there told me the metals used in the old components is far superior to the cheap stuff they see these days - on a lot of new cars etc.. he said it isn't intended to last, compared with the old stuff that can be re-welded up and repaired and continue to be good for many years.

[gav240z]

Just find a 240Z or early 260Z radiator and have it rodded out or recored if necessary and while the top tank is off have the inlet/outlet relocated to suit. Then it's good for many years to come.

 

Beat me while replying, in a way that's what I was hinting

[Cozza]

I got a zx radiator lying about in a pile of zx dung that you’re welcome to. Not sure if the dimensions are appropriate or not though.

Can post some pics and dims. if it helps.

 

Mick

[KatoKid]

I contacted PWR and they do a radiator for an RB 240z, but the quote was $1800 with fan, or $1200 without. I might be a bit tight, but $1200 still seemed a lot to me. The US option looks quite cheap now. My only concern is with the overseas postage and radiators being a bit fragile. 

 

I'll keep looking for options.

 

I got a quote from PWR and it was $1200....couldn't justify it so bought an alloy one from eBay with fans and shroud for $360 (I think) and had the necks modified for the M3 engine for $60.

 

So far very happy with it.

[Retro Z]

Why don't you just bend some pipe to a ebay or stock radiator?

[GregTas]

Thanks for all the advice guys, appreciated.

 

Just find a 240Z or early 260Z radiator and have it rodded out or recored if necessary and while the top tank is off have the inlet/outlet relocated to suit. Then it's good for many years to come.

 

I had thought about the std radiator as it would obviously be a good fit, but if I relocated the top fitted I had wondered how well it would cool with the easiest path is straight down through a limited number of tubes. The car is being used for circuit racing and so the cooling system will be getting pushed.

 

 

Yeah the other option is to look at a radiator that is about the stock size and then have brackets fabricated to work with the stock mounting points? Someone who is good with TIG welding should be able to do it.

 

Not sure what the mighty car mods boys did with their RB26 conversion? But it looked like it mounted up to stock mounting locations.

 

The PWR radiator is a cross flow that has mounting plates on the side like the std ones. Mighty car mods might have used one of these.

 

I got a zx radiator lying about in a pile of zx dung that you’re welcome to. Not sure if the dimensions are appropriate or not though.
Can post some pics and dims. if it helps.

Mick

 

Thanks Mick on the offer but won't take it up because I'd have to mod it and so probably best starting with something new.

 

I got a quote from PWR and it was $1200....couldn't justify it so bought an alloy one from eBay with fans and shroud for $360 (I think) and had the necks modified for the M3 engine for $60.

 

So far very happy with it.

 

Yeah I suspect it will probably be something modfied.

 

Why don't you just bend some pipe to a ebay or stock radiator?

 

That is an option but I would like to run the factory viscous fan fi possible. Thsi method would prevent this. I also don't have a radiator so will try and find one with the outlets on the same side.

 

I think I'll do some hunting for a cross flow radiator that I can mod.

 

I need to keep this cool.

 

Edited May 9, 2018 by GregTas

[dat2kman]

Be aware that relocating an inlet to same side as outlet , unless the rad is a proper bypass rad, will have your engine overheating quickly.

Bypass rads are designed so that the coolant has to pass through all tubes, before it can exit.

 

If you are going to purchase, get a new one, not a Nissan, but a HX/HZ V8 Holden unit from AdRad, they will be more readily available, than an AdRad original Nssan unit.

[OdinZ]

Not sure what the mighty car mods boys did with their RB26 conversion? But it looked like it mounted up to stock mounting locations.

 

The MCM boys used an R32 radiator, and modded it (twice to for the shroud) to fit

[Scando]

That is an option but I would like to run the factory viscous fan fi possible. Thsi method would prevent this. I also don't have a radiator so will try and find one with the outlets on the same side.

 

 

Hi Greg,  we went with a crossover pipe tucked in close to the timing belt cover and CAS.  I think this would fit in behind the factory fan.  We ended up going with a thermofan anyway though.

[dat240z]

I went a Mckinney Motorsport aluminium  RB fan/shroud/radiator from the states. Very good for cooling, unfortunately its a little too race orientated - quite noisy, but could change the fan/shroud Id assume/

[GregTas]

Thanks all. I think it's a standard style radiator with a cross over pipe. I might do it so the top fitting is on the RHS and bottom on LHS. This means crossover pipe is underneath.

 

If you are going to purchase, get a new one, not a Nissan, but a HX/HZ V8 Holden unit from AdRad, they will be more readily available, than an AdRad original Nssan unit.

 

Thanks I think that might be the way to go.

 

I'll provide an update when I get sorted because it might help others later on.

[240z71]

https://www.gumtree.com.au/s-ad/hamilton-hill/wrecking/240z-260z-280z-rb-radiator-/1183997545

[GregTas]

So i"ve got my radiator sorted I went with the HZ V8 rad that was suggested by @dat2kman It's a brass 'Auto Rad' 618 core. It's a big core and very snug fit between the rails. Only 3 or 4mm clearance. The side bands had to get the bottom trimmed off them and the bottom of them sits on the top of the chassis rails. Very pleased with it.

On the RB25 both pipes are on the drivers side. I was going to have the bottom pipe on the passenger side and use an external pipe to cross it back. The guy doing it had a better way and the top pipe has a 90 degree bend inside it to direct the water to the passenger side so it should work similar to if the pipes were on opposite sides. The rad is a bit taller and will sit lower so I got the bottom fitting pointed up.

It ended up costing me $700.

Close now to getting my engine started up.