Prado LJ78 Radiator upgrades/mods????????

Joined
Jan 14, 2016
Messages
20
Location
haiti
I have a 1990 LJ78 and my radiator needs to be replace. I'm thinking of buying this radiator on ebay TOYOTA SURF HILUX 2.4 2.0 LN130 all aluminum Radiator with oil cooler AT/MT I'm not too much of an expert on cars but can someone please tell me if this radiator will be compatible for my LJ78? Also, can tell me if the transmission cooler work on my car and is there anything extra I need beside the actual radiator itself that I need to buy to make the connections with the transmission oil?

Thanks everyone your advice has help a lot in the past!
 
Joined
Nov 27, 2017
Messages
82
Location
Seattle, WA
It's been a while since I had a radiator re-cored. I remember it being relatively inexpensive. The fly in the ointment for the LJ78 would be the integrated transmission fluid cooler. Good luck. Let us know what you choose to do and how it turns out.
 

GTSSportCoupe

2LTE whisperer
Joined
Mar 23, 2012
Messages
5,525
Location
Victoria, BC, Canada
thx @GTSSportCoupe
I think if I change it I would like to go with something bigger than stock. Is there anything out there you could recommend?
hey Nick,

thx for the link for the radiator.
You said its not a perfect fit but it's ok. Are you saying it's not the best quality or it doesn't cool down the engine very well?
Atm my temp gauge starts climbing when I hit 600°f egt (before turbo) which is way to early I think. The last thing I haven't changed is the radiator as I thought it was alright but it isn't apparently.
You get what you pay for with that radiator. The core and end tanks are ok. Inlet/outlet and trans cooler stuff is all there. Basically it's the side brackets that are crude and a bit out of dimension compared to the Toyota original. Nothing that can't be worked with though.

As far as cooling goes it's been pretty good for me so far. Better than the good condition equivalent thickness (48mm?) copper temporary rad I had in the truck before it. However the original copper rad in my truck was 56mm thick (started loosing fins though) and it was great; thus I think if you could find a 56mm aluminum rad, that would be best.

With all normal driving with the ebay aluminum rad my temps are totally under control. I have done some towing with it (9000lb truck/trailer total weight), and my coolant temps did go up to around 205F. Those were not really long hills though. Later in the summer I can let you know more as I do more towing on longer trips.
 
Joined
Oct 2, 2015
Messages
476
Location
Las Vegas
@CRSWA , I purchased the same radiator as Nick and for the past 3 weeks it has worked fine. It has been well above 40 Celsius all week and my temps have been steady at 80 Celsius plus or minus 2. I'm still crossing my fingers with this purchase, but so far it appears to be functioning fine. I have not pulled anything yet, nor have I done any trails or "wheeling."

I rebuilt/recored my old brass rad for $400 and only got 3 years out of it. So I was not impressed by the only guy here in Vegas that does it. Not sure what the exact definition of re-core is, but here in Vegas, the guy just bought another radiator with the same dimensions and brazed my mounting bracket from the LJ onto the core from a 1990 4Runner & moved the inlet and capped the filler neck. A little too much Jerry Rigging in my opinion. I think it was the lazy man's route at a high price. If you have a good local radiator guy near you, I'd ask first, what his definition of "re-core" is. If it is stripping down a HILUX or 4Runner Radiator to adapt it to yours, I'd personally move on based on my experience.

I just rolled the dice with the "Winner" Rad from China. They shipped it DHL and it arrived in less than a week for $330 USD. Again, keeping my fingers crossed but so far, so good.

I did not have any issues with alignment/mounting on this one. Mine bolted right up. However, mine is a pre-1990 and the shroud mounting holes are different than the 1990 and after LJs. Also I run a larger diameter Isuzu Trooper Fan. One of these days I'll get around to doing a custom shroud.

Hope that helps.
Don

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Joined
May 17, 2018
Messages
6
Location
Portland, Oregon
@CRSWA , I purchased the same radiator as Nick and for the past 3 weeks it has worked fine. It has been well above 40 Celsius all week and my temps have been steady at 80 Celsius plus or minus 2. I'm still crossing my fingers with this purchase, but so far it appears to be functioning fine. I have not pulled anything yet, nor have I done any trails or "wheeling."

I rebuilt/recored my old brass rad for $400 and only got 3 years out of it. So I was not impressed by the only guy here in Vegas that does it. Not sure what the exact definition of re-core is, but here in Vegas, the guy just bought another radiator with the same dimensions and brazed my mounting bracket from the LJ onto the core from a 1990 4Runner & moved the inlet and capped the filler neck. A little too much Jerry Rigging in my opinion. I think it was the lazy man's route at a high price. If you have a good local radiator guy near you, I'd ask first, what his definition of "re-core" is. If it is stripping down a HILUX or 4Runner Radiator to adapt it to yours, I'd personally move on based on my experience.

I just rolled the dice with the "Winner" Rad from China. They shipped it DHL and it arrived in less than a week for $330 USD. Again, keeping my fingers crossed but so far, so good.

I did not have any issues with alignment/mounting on this one. Mine bolted right up. However, mine is a pre-1990 and the shroud mounting holes are different than the 1990 and after LJs. Also I run a larger diameter Isuzu Trooper Fan. One of these days I'll get around to doing a custom shroud.

Hope that helps.
Don

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thats great help. thx.
do you have any egt gauge mounted to tell what egts the radiator can handle till the engine starts to heat up?
 
Joined
Oct 2, 2015
Messages
476
Location
Las Vegas
@ToSc , I do have a digital EGT and digital Water Temp Gauge. It does help a lot having those.
It was 110F today and water temp indicated 42Celsius (ambient) before I started the LJ. It warms up to 80 Celsius on a day like today in 12-15 minutes.

Around town driving EGTs are 250C too 400C. Water Temp always seems to hang around 80 C.
My old radiator wasn't even losing any fluid noticeably. I just noticed calcium deposits and occasional water temp spikes into the 100 range for 1-4 seconds and the back to 80. The stock temp gauge never moved. So it is nice to have the digital back up or I really would not have noticed the problem until it was perhaps too late.

On a scary note, I have had EGT temps in the 700 range on 6% upgrades and the water temp wasn't even above 82 celsius. I don't feel comfortable with those EGTs, but I know the radiator is doing its job.
 
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