I need to change out the rad in my 91 w250 w auto. I would like to put a crossflow in if possible. I looked in the stickies but didn't find the procedure. I need to do this soon as I am going on vacation with the truck and trailer.
A parts list would be a big help. If someone has step by step instructions that would be even better. Thanks in advance. Don

 

Would like to know that too............

 

why do you want a cross flow for

 

The cross flow rads are a lot cheaper. Not sure why. Also from what I read, they seem to be more effective at cooling the motor.

 

If I remember right all you need is the I/C thermostat housing and hoses. I haven't done one for a long time so there may be more to it than that.

 

Water temp runs cooler bro...

 

Keep us posted if you would. Someone else here may be able to help..Thanks man !

 

i have herd that they arnt worth a **** may prove that wrong
the reason why,
in a traditional radiator....
hot water comes in the top as it cools it travels down then into the water pump as heat rises and it goes through the block
(conventional flow) (all highs go to lows) and early cars had a conventional flow system and no water pump! and if you want to get real technical you can get into Reverse flow like the new corvettes have now that works super

so if a cross flow works so well why are cheaper and why do they not come stock (or do they) just my opinion

 

As has been said above, the intercooled thurm housing, as well as the intercooler shroud, to go with the radiator(they are not the same).

The radiator support is different between intercooled an non, so you will need to build all you supports for the radiator.

I have not when this route, so i can't add any more insight then is.

Mine will some day have a 2nt gen radiator to match my intercooler.

If you're in a "hurry", i would put the stock radiator back in......all tho, the cross flow is an improvement!!!!!!!

 

The problem with the p.o.s. down flow radiator for the non intercooled truck is that the Inlet and Outlet are on the same side.

What happen is that the fan clutch is slow to engage when the temp starts to climb. As the air travelling thru the middle and end (drivers side)of the radiator is cool do to vary low flow. The passenger side of the radiator is traveling vary fast and vary little air flow to cool it.

The fan finally start to engage and pull some air, the gauge start to fall,........then the fan disengages, and the eng starts getting hot again,.....all this happening while you trying to pull a hill and not wanting to lift on the go peddle............BUT YOU HAVE TO.

 

Thanks Flash.... Somebody needs to do the conv. And have Lary or Madhat make it a sticky...........

 

Yeah, some day......year. have two 2nt gen radiators in my shop.

keep holding then up to the truck, getting a tape measure out........but never get past that part...........

And now Easter weekend left me with injection pump problem...........sad to say but, that project is still a ways outs

 

i swapted mine out for a cross flow on my blue truck,

i got a 91.5 or later core support, radiator,fan, fan sroud,t-stat housing,over flow bottle, hoses.

 

After getting the parts, was it a straight bolt on conversion, or did you have to do some fabrication.

 

Some minor fabbing of radiator top and bottom mounts is all that is needed besides the obvious of t-stat housing, top hose and radiator. Sorry no pics. I have one in my 90.