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Aftermarket Radiators

I have a 77 GM 5 ton truck with a 427. It's a hot mother. To help with heat everyone removes the rubber flaps in the wheel wells. Maybe that would help with heat and air flow on the 6.5 as well.
 
Might not look too classy ,but some guys have reported shimming up hood at hinges to let air thru.
 
When I had trouble with over heating,with the 6.5 , I welded the fan solid with two pieces of steel and put in a high flow 180 degree thermostat for a big block chrysler,The temperature never went over 180 no mater how I drove it, I didn't like the fan noise though, I now have a flex fan ,it is quieter but don't cool as good, if you have the thread on fan you could use one off of a vortec 350 chevy van, some of these have 9 blades. I don't think an clutch fan will out do a solid one as it will probably still slip a little at higher rpms.
 
6.2 turbo said:
When I had trouble with over heating,with the 6.5 , I welded the fan solid with two pieces of steel and put in a high flow 180 degree thermostat for a big block chrysler,The temperature never went over 180 no mater how I drove it, I didn't like the fan noise though, I now have a flex fan ,it is quieter but don't cool as good, if you have the thread on fan you could use one off of a vortec 350 chevy van, some of these have 9 blades. I don't think an clutch fan will out do a solid one as it will probably still slip a little at higher rpms.
Click to expand...

not liking the solid mount fan idea ....... maybe an air operated or hydraulic fan clutch would be better ...... did something like that exist in the top kick or Kodiaks?

I like the BB mopar thermostat idea........ and the Vortec 350 fan Idea ..... gots to be cheaper than a Duramax fan......
 
6.2 turbo said:
When I had trouble with over heating,with the 6.5 , I welded the fan solid with two pieces of steel and put in a high flow 180 degree thermostat for a big block chrysler,The temperature never went over 180 no mater how I drove it, I didn't like the fan noise though, I now have a flex fan ,it is quieter but don't cool as good, if you have the thread on fan you could use one off of a vortec 350 chevy van, some of these have 9 blades. I don't think an clutch fan will out do a solid one as it will probably still slip a little at higher rpms.
Click to expand...

Seems like a solid fan would hurt your MPGs, Ive never heard of the chrystler thermostat. Is this with just the single thermostat?
 
The chrysler thermostat was just a single, Mr Gasket they are made for high performance and racing ,they open differently, and flow alot ,only thing is they don't block off the by pass, so at first I just restricted the by pass to 3/8 inch,I now totaly removed the by pass and put in pipe plugs, seems to work fine. You could also tap into the rear water block off plates and by pass a little off there, there is kits for that. I would like to do that and then run that through the heater core and plug the stupid quick connect up front.
 
I don't think the AC clutch would be heavy duty enough. The hyd you could just make manual turn it on when you want and have a machinist put on a serp pulley.
 
Some newer jeeps have a hydrolic fan driven by the pwr str pump, not sweet at all.
 
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