radiator in back

[85lux]

i'm having trouble cooling my hilux with the 3b. i was going to run a fairlain v8 radiator in the tray with a big thermo. anybody doing this kind of thing. my only worry is at highway speeds. will the thermo be pushing enough air to keep it cool?? this will also solve the mud in radiator issue.

[mattsluxtruck]

Only drama with that set up is that the standard water pump will not push the volume of water through quick enough. The answer to this is to fit and electric water pump like pat did to the sierra with v6 conversion. All in all it should work ok though. I believe finding the true cause of the overheating and fixing that is money better spent but.

[85lux]

i believe the cause of the problem is that only about half the radiator has air flowing through it. it has three objects blocking it. radiator support panel and bonnet catch, chassis crossmember and body crossmember. i don't have room for an engine driven fan and can only just fit my two 10" thermos. also the winch is up high. i was thinking that a radiator in the back would let me utilise the whole radiator, not just a small portion of it like i have now.

[Hybrid]

Dont know if I can be of any help to you 85 but I am doing this at the moment. Problem is that I'm doing 100 other things as well so it wont be driving highways for a couple months. Maybe earlier if I put my head down.

Anyway I asked similar questions on here and other places and got similar answers. Not alot of guys are doing it and that I should be worried about airlocks at highway speeds screwing up airflow. I decided to slope the radiator over and put a fairing underneath to redirect air from under the car. I thought this way I may be able to get it under the tray too. Well I built the mount and welded it to the chassis the other day and I've put a hell of an angle on it. I pm'd a few guys in the states that have inclined their radiators and they said technically you could run it flat if you can get airflow and eliminate airpockets in the lines which stop coolant flow. To do this they said I'd need to be able to get the filling point above the engine which they achieve by lifting the arse of the rig. So im afraid im on a bit of a trial and error mission and I know a lot of people will say it wont work but at least then I can learn from my mistakes.

Anyway as it stands now I have a v8 au radiator and thermo going in under a lifted tray. Im going to run an electric pump in-line and the same exhaust pipe lines the boys up here run in their buggies because it fits the engine and radiator outlet sizes. My worries at the moment is running the piping without taking it under the chassis rail or having it too close to the exhaust. Also im worrying about getting it primed once its in because my radiator will run much flater and therfore lower than any I've seen in the states. If you like I can post a pic of the mount to show the angle im talking about.

Sorry for the ramble

John

[85lux]

pics would be great hybrid, i think to remove airlocks i will have to tap a hole in the thermostat housing to bleed the air out. are the inline pumps expensive???

[Hybrid]

Beebee got me one today. Was $170 and supposed to be good for up to 5 litre non modified engines. And thats as a complete replacement. So if your mechanical pump is still pumping and she still overheats I dont think flow will be the problem. Dunno if that $170 is discounted or not.

As for pics all I've got now is the bracket welded into a bare chassis. So I havent got any of the plumbimg sorted or anything but I can chuck the rad and thermos in tomorrow maybe and take some pics.

John

[ToNkA]

I am currently putting my radiator in the tray. Wont be driving the thing on the highway for another month so can't tell you anymore till then.