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#1
August 25th, 2016, 06:29 AM
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V6 Fan Question.
So I have been running my 305 and noticed the fan seems to blow air more upwards than it does at the engine. Seems to draw through the radiator ok, but never really blows it on the engine. Is this normal? The blades look fine and none are bent that I can see. Is there a shroud that will fit?
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"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. Last edited by TJ's GMC; August 25th, 2016 at 10:51 PM. 
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#2
August 26th, 2016, 12:44 AM
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Re: V6 Fan Question.
Hi TJ, drawing air through the radiator is the purpose of the fan. Blowing air on the engine is really a very minimal way of cooling the engine, unless of course it is an air cooled engine. A shroud would help pull air through the radiator much more efficiently and cover it's entire surface but it's purpose isn't to direct air on the engine. If you find or build a shroud the fan blade pitch should be about 50% inside the shroud.
The fan is actually trying to throw the heated air that was just pulled through the radiator out and away from the engine and that is completely normal. DAC
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Doug Crawford Rapid City, SD 1970 GMC K5 Jimmy Mom drove 30 years 1972 GMC C2500 owned since 1979 1955 GMC 100 driver-project 2006 GMC Yukon Denali---wife's truck Hope to have a '60 GMC Suburban again someday Last edited by GMCDAC; August 26th, 2016 at 12:50 AM.
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#3
August 26th, 2016, 02:37 AM
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Re: V6 Fan Question.
Well said and great explanation! Of course all engines are air cooled, either directly or indirectly if they have a radiator.
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#4
August 26th, 2016, 10:48 PM
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Re: V6 Fan Question.
Thanks for the replies! Just wanting to make sure as it is the heat of summer here and I don't want to over heat. haha Now that the engine is Clean on the inside it's been running a bit warmer which is good imop. Actually moving some water now. haha And the cylinders and chambers are clean.
__________________
"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
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#5
August 28th, 2016, 12:00 AM
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Re: V6 Fan Question.
Good info from DAC. Since you can't stick your hand down by the fan or radiator to feel the temp of air coming out, you are actually sensing the air blowing over/past hot exhaust manifolds and block. Bottom line, as you know..... temp gauge reading.
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