1HZ radiator options

[ATL Cruiser]

1992 HZJ77 automatic transmission

My 30yo radiator is starting to leak at the seams. It's a small leak, but I'll need to deal with it eventually. OEM radiators are no longer produced; otherwise, I'd just grab one from Toyota.

Curious what everyone is upgrading to. Checking my options before just getting this one recored.

 

[TonyP]

I went with a Terrain Tamer HD radiator. Steel brackets, aluminum tanks, fully pressed.
I haven't seen it in person but from what I understand they're quality units.

 

[FJ73Texas]

I have heard that some people just get 16400-17080 and install a separate aftermarket transmission cooler for the auto.

 

[OGBeno]

-17080 is available from any Toyota dealer in the US.

As Matt said, you’d need an auxiliary trans cooler and route the lines accordingly.

The -17080 unit is **nice**.

 

[ATL Cruiser]

I went with a Terrain Tamer HD radiator. Steel brackets, aluminum tanks, fully pressed.
I haven't seen it in person but from what I understand they're quality units.

Those look solid. Is your truck an automatic? Looks like they only fit M/T.

@OGBeno / @FJ73Texas thank you. Those do look nice. The external trans cooler is definitely an option if it comes down to that. I'm tight on real estate with this PDI intercooler up front.

 

[TonyP]

Those look solid. Is your truck an automatic? Looks like they only fit M/T.

@OGBeno / @FJ73Texas thank you. Those do look nice. The external trans cooler is definitely an option if it comes down to that. I'm tight on real estate with this PDI intercooler up front.

No, H152. I don't know if they have auto provisions in their HZ/HD coolers. Their customer service was great so shoot them an email.

 

[sodafeld1]

I prefer brass n copper over aluminium, if needed grass seed can be burnt out of copper ones, can't do that with alu. I don't know if you can get a copper one for yours tho.

 

[sodafeld1]

yep 16400-17080, brass n cooper good onya mr.t

 

[Gun Runner 5]

Perhaps it‘s simply incorrect folklore but I was under the impression that an aluminum radiator would cool down faster once the engine was no longer under stress.

 

[LDowney]

Perhaps it‘s simply incorrect folklore but I was under the impression that an aluminum radiator would cool down faster once the engine was no longer under stress.

Aluminum is a better conductor (temperature and current) than Steel (Fe). So theoretically, an aluminum radiator should perform better than a steel radiator for identical parameters (i.e., construction geometry) as you have indicated. However, wall thicknesses can be thinner with steel than that of aluminum due to material properties and design (for manufacturing/assembly) which may lead to physical differences between radiators of these material types. This can result in differences in heat conduction surface areas and differences in heat conduction efficiencies ... which combine to influence the total installed performance of the radiator.

So folklore has a basis in fact here (relative to Al being a better conductor), but the devil is in the details when assessing total performance between Al and Fe radiator options.

 

[Gun Runner 5]

Aluminum is a better conductor (temperature and current) than Steel (Fe). So theoretically, an aluminum radiator should perform better than a steel radiator for identical parameters (i.e., construction geometry) as you have indicated. However, wall thicknesses can be thinner with steel than that of aluminum due to material properties and design (for manufacturing/assembly) which may lead to physical differences between radiators of these material types. This can result in differences in heat conduction surface areas and differences in heat conduction efficiencies ... which combine to influence the total installed performance of the radiator.

So folklore has a basis in fact here (relative to Al being a better conductor), but the devil is in the details when assessing total performance between Al and Fe radiator options.

Damn Larry, you’ve known me for long enough to know that you should use smaller words when replying to one of my post.

 

[LDowney]

Damn Larry, you’ve known me for long enough to know that you should use smaller words when replying to one of my post.

As you know, I am an enginerd so communication abilities are not my strength. Please be as tolerant of my short comings as possible ... I am peddling as fast as I can.

 

[JuanJ]

As you know, I am an enginerd so communication abilities are not my strength. Please be as tolerant of my short comings as possible ... I am peddling as fast as I can.

Hello,

Dumb question.

Does diesel engine rattling/vibration have an effect on aluminum radiators?





Juan

 

[sodafeld1]

lots of cars and 4wd's have aluminium radiators. I don't have hard data but I know copper is more forgiving as a metal and plenty conductive. Electrical wires are not made from aluminium, they would not last 30+ years.

 

[LDowney]

Hello,

Dumb question.

Does diesel engine rattling/vibration have an effect on aluminum radiators?





Juan

Clearly not a dumb question, but I am probably not the best to answer with direct/applicable experience

Yes, but the results are a function of the details. Aluminum is not as robust to fatigue as steel. Of the aftermarket aluminum radiators that I have seen in use, they all appeared to be fabricated thicker material and more stoutly than steel radiators in the same application. This leads me to conclude that the manufacturers of the aluminum radiators realize this and have developed their product accordingly (i.e., they have learned from hard knock lessons).
Back to your point on the higher vibration environment inherent with a diesel engine ... Mounting an aluminum radiator with shock mounting (or shock mitigation) considerations would be desirable to increase the service life of the radiator. To me this consideration was amplified by Toyota. The OEM steel radiator on my BJ70 includes limited shock isolation features, so Toyota identified it as a consideration that merited action. Steel or aluminum radiator tolerance in a high vibration environment; this is a consideration that probably should not be ignored.

 

[ATL Cruiser]

Thank you everyone for the replies. Regarding the A440F / 77 / 1HZ radiator, there is nothing new out there. Terrain Tamer only makes a M/T version. Toyota is NLA. Stedman can likely get one built but nothing new.

I'm coming up with 3 options:

1. Get a custom radiator built
2. Get the original radiator re-cored
3. Swap out to a M/T radiator and add a trans cooler

Based on everyone's advice, I'm going with option #3, swapping out for a M/T radiator and adding a trans cooler.

Due to this massive PDI intercooler I installed, the trans cooler is going to need to go below everything. Before I start looking for a perfect fit online, I'm curious if anyone has found the best fit option for this trans cooler yet?

 

[FJBen]

In less words….the cheap chinesium aluminum rads seem to break the mounts where as the nicer Ron Davis /custom seem to last.
A nice aluminum would prob be great
OEM is proven and great
A good old school rebuild using your top/bottom tanks should last another 30 years. I paid $750 for a 4 row radiator steel rad built using my tanks.

Any rebuild shops near you?

 

[FJ73Texas]

Although that new 1HZ radiator is so tempting (I need to buy one to stock up on), a rebuild of the original probably would be the cleanest way. Hard to decide.

Personally I don't like aluminum radiators but I know the high end ones such as the Ron Davis that FJBen mentioned are proven to be reliable.

That being said...when I needed to replace the radiator in the FJ73 and wanted brass/copper replacement. I found a direct, drop in that was exactly like the original from ADRAD which seems to be a division of Koyorad in Australia.

It is worth asking if they have a replacement for you.

https://radshop.com.au/ts1657176775...Catalogue_2014_lowres_1118_Radiators Only.pdf

 

[ardnez]

Personally on mine I ordered the manual transmission radiator OEM PN# 16400-17080 and had the outlet and cooler line portion of my old radiator soldered on to the new radiator, sand blasted and all. 2 years going strong.

 

[ardnez]