1965 GMC 305E fan shroud. Never existed? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**aerotruk63** · 08-26-2016, 01:28 PM

Buddy of mine has a 65 GMC Suburban with a 305 V6. He is having overheating issues at idle and was thinking of a shroud. Have been looking, but, from info so far, no stock shroud for the 305 in 65?
Had the radiator rebuilt to a triple core, still heats up at idle.
Went to a seven blade fan, issue still there.

UPDATE: according to the parts book only baffles were available?

TJ's Chevy · 08-26-2016, 05:59 PM

What's the weather like where he lives? I think something else is wrong as these engines were built with large water ports to aid in cooling. My 305 never gets over 195 at idle...even when it was 105-110 out. I am running a large dual core aluminum radiator. I would disconnect the hoses and run water through the engine to make sure no passage ways are clogged. Is the thermostat sticking? Does the water bubble while the engine is running? If a head gasket is blown it will cause it to over heat. If I remember right you Could get a shroud, but as cool as these seem to run it wasn't needed.

duallyjams · 08-26-2016, 07:57 PM

Mine is all original I can start it up and walk away and let it idle all day it will not over heat, something else is wrong, has he verified the gauge is good ?

Brad54 · 08-26-2016, 10:53 PM

I agree something else is wrong.
Tell him to check the timing. That'll make it run hot.
So will a bad fuel fuel pump: lean makes it run hot.
Bad thermostat, and a cracked head will, too.
Posted via Mobile Device

08-26-2016, 01:28 PM	#1
aerotruk63 Check The Champ, Demonstrator Join Date: Jun 2009 Location: Montreal,Quebec Posts: 6,627	1965 GMC 305E fan shroud. Never existed? Buddy of mine has a 65 GMC Suburban with a 305 V6. He is having overheating issues at idle and was thinking of a shroud. Have been looking, but, from info so far, no stock shroud for the 305 in 65? Had the radiator rebuilt to a triple core, still heats up at idle. Went to a seven blade fan, issue still there. UPDATE: according to the parts book only baffles were available? __________________ 1963 *Chevrolet Truck* Literature LINK: https://picasaweb.google.com/113840717762774560215 YouTube Channel with 20+ Original *Chevrolet Truck* Salesmen, Mechanics & Service Department Training Slideshows. https://www.youtube.com/results?sear...otruk63&page=1 Last edited by aerotruk63; 08-26-2016 at 03:21 PM.

08-26-2016, 05:59 PM	#2
TJ's Chevy Registered User Join Date: Mar 2013 Location: Southern Oregon Posts: 10,384	Re: 1965 GMC 305E fan shroud. Never existed? What's the weather like where he lives? I think something else is wrong as these engines were built with large water ports to aid in cooling. My 305 never gets over 195 at idle...even when it was 105-110 out. I am running a large dual core aluminum radiator. I would disconnect the hoses and run water through the engine to make sure no passage ways are clogged. Is the thermostat sticking? Does the water bubble while the engine is running? If a head gasket is blown it will cause it to over heat. If I remember right you Could get a shroud, but as cool as these seem to run it wasn't needed. __________________ 1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw

08-26-2016, 07:57 PM	#3
duallyjams Registered User Join Date: May 2007 Location: Deale Md Posts: 4,663	Re: 1965 GMC 305E fan shroud. Never existed? Mine is all original I can start it up and walk away and let it idle all day it will not over heat, something else is wrong, has he verified the gauge is good ? __________________ James 63 GMC V6 4speed carryall 65 chevy swb bbw V8 auto 68 K20 327/4 speed, buddy buckets 2002 GMC CC Dually Duramax 64 GMC lwb 3/4 V6 4speed SOLD 66 GMC swb bbw buddy buckets SOLD IG duallyjams The only thing that stays the same is constant change!

08-26-2016, 10:53 PM	#4
Brad54 Registered User Join Date: Aug 2006 Location: Athens, Georgia Posts: 1,458	Re: 1965 GMC 305E fan shroud. Never existed? I agree something else is wrong. Tell him to check the timing. That'll make it run hot. So will a bad fuel fuel pump: lean makes it run hot. Bad thermostat, and a cracked head will, too. Posted via Mobile Device __________________ '61 Suburban daily driver: off the road due to 180-pound 8-pt buck! '62 K-10 long-step project '61 C30 Camper, aka "Valdez" There's no cool like Old School



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