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07-04-2021, 12:54 PM
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#1 |
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Senior Member
  
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,385
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Fan shroud seal?
Was there any type of fan shroud seal installed factory? Do you recommend one, I hear the running temperature can drop just by sealing the top.
I installed this OEM shroud to fit better than factory, they either just threw one on or the core support was replaced, which I doubt. Can't speak for the radiator beyond it's "original replacement". Anyway, there's maybe a 3/8" gap on top, and about equal along the sides.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly guide (kit) for restoring this truck from the ground up, complete with details including full hardware descriptions. Much of the info. applies to all 67-72 GM. My build thread, with some info. about the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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07-04-2021, 03:23 PM
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#2 |
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Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: Fan shroud seal?
Yep, mine is the same. With old radiator, I taped the gap which helped keep the temp from creeping up while in traffic. But, with a new aluminum radiator, the temps stay normal and taping the gap is not necessary any longer.
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07-04-2021, 05:35 PM
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#3 | |
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Senior Member
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,385
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Re: Fan shroud seal?
Quote:
Thanks.... Yeah, probably should have got an aluminum radiator, assuming they come with a port for a heater hose. This radiator is a piece of junk  It had the structural straps, but I cut them off I may try foam insulation tape, see what happens, though this won't be driving much either way.
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Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly guide (kit) for restoring this truck from the ground up, complete with details including full hardware descriptions. Much of the info. applies to all 67-72 GM. My build thread, with some info. about the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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07-05-2021, 01:52 PM
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#4 |
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Registered User
Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 1,211
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Re: Fan shroud seal?
When I replaced my old style 4 core with a aluminum 3 core, I had a large gap between the radiator and the shroud. I got some expanding foam seals from Lowes and sealed top, sides and most of the bottom. Worked great. Don't know if it's the new radiator or the closing of the gaps, but it is running cooler, especially at idle with the A/C on. My old radiator was in pretty good shape, just cracked and was leaking at one of the tubes to side tank.
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
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07-05-2021, 04:24 PM
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#5 | |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,810
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Re: Fan shroud seal?
Quote:
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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07-06-2021, 04:56 PM
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#6 |
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Registered User
Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 1,211
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Re: Fan shroud seal?
That looks like the stuff I used. It was labeled expanding foam sealant. I actually had to use 2 layers on the sides. So far it seems to be working and staying in place. For once something worked like I thought it should.
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
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07-06-2021, 08:34 PM
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#7 |
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Registered User
Join Date: Jun 2015
Location: @
Posts: 890
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Re: Fan shroud seal?
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