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02-15-2013, 02:16 AM
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#1 |
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Registered User
Join Date: Jun 2010
Location: Las Vegas, Nv
Posts: 312
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Fan Shrouds
I personally may need this info, but couldn't find it anywhere, so it should help anyone looking for it in the future.
What are the differences in the a/c vs non a/c shrouds for the 81-91 350's? LMC says that the bottom is the same, but the top is different. Classic industries lists the top and bottom different for a/c vs non. Also, is there any difference in the shrouds in 4x4 vs 4x2 versions? I read at one point that there was, but can't find it now. It supposedly had something to do with the engine being mounted further back in the 4x4's.
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1995 Suburban K2500 454.....off road & towing 1999 Astro, work van 2006 Silverado 2wd 5.3 w/4.5" lift and 33s |
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02-15-2013, 10:30 AM
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#2 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: Fan Shrouds
The top versions for A/C account for refrigerant hoses. GM ran the A/C coolant lines over the radiator. Later, GM ran them over the engine.
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02-15-2013, 11:09 AM
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#3 |
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Registered User
Join Date: Sep 2008
Location: Bailey, NC
Posts: 2,462
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Re: Fan Shrouds
I agree with gchemist. The only difference I've ever noticed was the ac lines mounted to the top of the upper shroud. But they are the same size. The only difference in the fans are the clutch (standard duty or heavy duty).
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Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT |
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02-15-2013, 12:06 PM
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#4 |
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Registered User
Join Date: Feb 2012
Location: Lakeway, TX
Posts: 335
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Re: Fan Shrouds
So since I am going to run a Vintage Air system, and not route the AC lines over the radiator, then either shroud should work for me, correct?
Sorry for the hijack...
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1972 GMC Sierra Grande (current truck) 1980 Chevy Stepside (gone) 1987 Chevy Blazer (gone) 1972 Chevelle SS Convertible (gone) 1973 Chevy Corvette (gone) 1967 Chevy Camaro (STOLEN!) |
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02-15-2013, 01:44 PM
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#5 |
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Registered User
Join Date: Jun 2010
Location: Las Vegas, Nv
Posts: 312
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Re: Fan Shrouds
No worry bout the hijack...I was actually going to post the same question. Since in my case, the a/c compressor is on the right side of the engine, and the a/c lines don't run all over the place, the shroud type shouldn't matter?
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1995 Suburban K2500 454.....off road & towing 1999 Astro, work van 2006 Silverado 2wd 5.3 w/4.5" lift and 33s |
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02-15-2013, 01:46 PM
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#6 |
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Registered User
Join Date: Sep 2010
Location: Marble Falls, TX
Posts: 1,575
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Re: Fan Shrouds
I don't know but what about single piece fan shrouds? I put my 77's in last night and it was the worst fit ever. The clips that hold it to the core support on the bottom were about an inch to high (the shroud wasn't long enough) so I was wondering if maybe it came off of another vehicle.
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Michael Re-starting the neglected '77...http://67-72chevytrucks.com/vboard/s...=425464&page=9 |
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02-15-2013, 11:35 PM
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#7 |
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Registered User
Join Date: Jun 2010
Location: Las Vegas, Nv
Posts: 312
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Re: Fan Shrouds
Ok, so after some extensive research, the difference in the aftermarket(OE might be different) is that the non-ac top shrouds sit lower, and use a bracket that attaches to the back of the core support, whereas the top ac shroud sits higher, and uses the bracket the goes over, and attaches to the top of the core support. Also, the non-ac top shroud is meant for the short 17" radiator.
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1995 Suburban K2500 454.....off road & towing 1999 Astro, work van 2006 Silverado 2wd 5.3 w/4.5" lift and 33s |
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