Hi All,

Well the cooling initiative goes on...
Based on Scott's and others suggestion that a shroud may contribute to better cooling, for about $15 and a few hours I made a quick shroud ("lip") out of sheet aluminum. With my low fan placement I made the most complete shroud I could. Result: On a beautiful 50 degree fall day I still overheat in a mile or two. :-(

Dave and Jeff: It's not that I didn't believe you when you said I needed to move the fan up...its just that I was a little intimidated by the process of drilling & taping the block to accommodate the adapter plate. I'm not really set up for that kind of thing. I have another concern - the current fan clearance between the timing wheel and the radiator is really tight (1/8" from the flywheel, 1/4" from the radiator. Picture here if you are interested: http://picasaweb.google.com/lh/photo/ZcxPoQ0W5ARoJwaTW4yKQw?feat=directlink ). I assume the adapter plate adds about 1/4" to the length of the fan shaft assembly. Have any thoughts on what to do about this?

I think my next step will be to get the radiator checked out. However, when I drain it, it seems to accept water at almost 3 gal. per minute or so - which seems acceptable. I'll look for cool patches first.

I should also check out the timing as Dennis suggested since I believe the engine had some work done on it before I purchased it. I haven't played with a cars timing on 30 years but I still have my old timing light.

Dennis: You have a similar "low fan" in your 235/1940 - What type of fan do you have and do you have similar clearances to those that I have (see picture)?

Thanks to all for this great discussion.

Doug

if anyone is interested, here are some pictures of my shroud:
http://picasaweb.google.com/lh/photo/XtDbCoRYzPCAW2eNSqUQ8A?feat=directlink
http://picasaweb.google.com/lh/photo/s5NcxJKvJ8kxppsMrploiA?feat=directlink
http://picasaweb.google.com/lh/photo/1emxXOtsOfxrCXiYBgNkjg?feat=directlink


1940 Chevy 1/2-Ton
In the Stovebolt Gallery
Lots more pix of my truck