Rear mounted radiator

[91yotaprerunner]

My friend is gettin ready to do a rear mounted radiator on his toyota pick up. He has some questions and i couldnt find any previous post on the search. 1. What material should he use to plumb the radiator? 2. Will he need an external water pump? 3. Will he need some sort of scoop to run air into and through the radiator? Any help will be greatly appreciated.

[ntsqd]

1) Stainless tube is best, few use it because of expense and weight. Aluminum is next best, most use it. Steel & Copper both have their issues. They're partly solvable to solvable, but bother? Invest in a bead roller for the tube ends. Will help keep the hoses on the tubes. A well supported install along with flex joints (hose usually) will be crucial to long life. A swirl pot would be a good addition. Plumb it's vent hose to just under the cap. Make the cap the highest point of the system, and put a -3 purge hose on top of any high points likely to trap air.

2) Depends on the run distance, tube size, and what the stock pump is capable of. My guess is no.

3) Probably.

[steveG]

I had a bed mounted radiator on my 5.0L Ranger & I used the stock water pump. I never had any problems with coolant flow, but if you're runnung a 4 cyl, it may be marginal. Make sure you keep your plumbing diameter on the small side. I just used tub the same O.D. as the I.D. of the hoses. As far as material, I ran alum only because it was convenient (I found the exact size I needed at a local hardware store). You'll definitely need a scoop & the largest fan possible. Also, make your life easier & plumb in provisions to fill the radiator at the highest point in the cooling system at the engine, and the highest point at the rear

[racer951]

A hint on fans, dont get caught up in a high performance fan, just get one that moves a lot of air. That sounds like common sense, but here's an example.

At Henderson our team's class 7 had overheating problems. There is a high performance fan, big aluminum radiator, inline water pump, the works. In other words, the problem does not lie there. However, our guys got a fan from the Enduro Trophy Truck crew and guess what it was, a stock taurus fan that ended up putting out a lot more air than the "high performance" one already on the truck.

[SpareChangeRacng]

Stock fans (look at mustangs, taurus', etc.) are known for pulling MUCH more air than aftermarket ones. Plus they cost a lot les - like $30 at a junk yard.

[shower]

If you go the taurus fan route. Get one out of a 3.8 liter car. They had the 3 wire two speed fan. There is a huge thread about the taurus fans on pirate4x4.com.

Pirate 4x4 Taurus Fans (http://www.pirate4x4.com/forum/showthread.php?s=&threadid=120931&highlight=Ford+T aurus+electric+fan+tech+article)

[Josh_K]

I totally agree about the Taurus fans. I run two of them on my class 8 and all I ever have needed to run was one. The truck needs to Fluidine Enduro coolers on the oil but just one fan on the radiator. My radiator is also 24"x34" across the core.

If you were to go to one of the catalogs like Summit and order a Radiator that is for a Ford (19"x31") and put one of the Taurus fans on it with some large ducting, you would be fine. A Howe Radiator costs about $190.00

Get a Ford style radiator because they mount up more easily.

One question, is this truck a wide open, totally built pre-runner that needs the a hundred pounds of weight transfer to reach its maximum potential?

If its not I think you are making a big mistake because simpler it is the better. Plus it is just a pain in the rear for a little bling,bling that wont gain you anything.

[steveG]

If possible, I would definitely use an OEM fan. The quality is far superior to aftermarket stuff, Also, when looking, try to buy something you can buy a replacement motor for at any parts store...use something really common so you can always find parts...

[91yotaprerunner]

well ill put it to u this way, its a toyota pickup std cab, front will have 22 inches with a coilover, bypass, and hydro bump at both front corners, front chasis was cut off 6 inches back to make room for a skid plate design he had. No longer has room for a radiator up front. money is not an option to this kid so he will spend whatever it takes, he just cares about what will be the best. but he will be happy to see that he can use some cheaper things for better performance. But as far as i know i dont think he has any engine swaps planned. Thanx for all the help, he appreciates it alot.

[BA_DirtDriver]

Electric Fan Engineering - EFE should be on the web might have something that would fit. Real high end fans with duty ratings and high CFM . The one that I put on my truck pulls 4000 CFM I believe sounds like an airplane taking off when it kicks in.

FWIW

Bret