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05-21-2014, 03:06 PM
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#1 |
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Registered User
Join Date: Oct 2009
Location: Great White North
Posts: 1,520
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Which gas cap, vented or not?
How do I tell which gas cap I need for my 72 K5 Blazer. Vented or not? Anyone know the GM part number?
Thanks.
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Jeff. '72 Blazer K5 "Camshaft opinions are like belly buttons; everyone has one and no two are alike" My Blazer Build: http://67-72chevytrucks.com/vboard/s...d.php?t=626752 My Engine Build: http://67-72chevytrucks.com/vboard/s...d.php?t=637336 |
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05-21-2014, 04:15 PM
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#2 |
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One of the First
 
Join Date: Jan 2000
Location: St. Augustine,FL.
Posts: 4,059
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Re: Which gas cap, vented or not?
Stant # 10742 is what I run on my blazer.
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DAVID PASSMORE ST AUGUSTINE ,FL ZIP 32084 '71 SWB K/10 CUSTOM DELUXE (Chili) '72 BLAZER K/5 Muscle Truck (Mule) '72 LWB K/20 CHEYENNE (Blackie) |
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05-21-2014, 10:09 PM
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#3 |
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Senior Member
Join Date: Apr 2006
Location: Yuba City, Ca
Posts: 1,955
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Re: Which gas cap, vented or not?
I think it depends on the year and whether it's vented at the tank or the cap. You can probably run a vented on either. I think it's mainly an emissions control issue. May not be a good idea to run a non vented cap on a non vented tank though. Someone could prob chime in who knows more about the reasoning behind the vented cap.
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Kirk 72 Blazer CST 4wd highlander |
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05-22-2014, 04:26 PM
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#4 |
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Registered User
Join Date: Oct 2009
Location: Great White North
Posts: 1,520
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Re: Which gas cap, vented or not?
How do I tell if and where the Blazer tank is vented? I'm lost on this one.
__________________
Jeff. '72 Blazer K5 "Camshaft opinions are like belly buttons; everyone has one and no two are alike" My Blazer Build: http://67-72chevytrucks.com/vboard/s...d.php?t=626752 My Engine Build: http://67-72chevytrucks.com/vboard/s...d.php?t=637336 |
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05-22-2014, 08:13 PM
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#5 |
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Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,129
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Re: Which gas cap, vented or not?
72 isn't vented. The fumes are pulled into the engine and burned.
72 had a charcoal canister in front of one inner fender and a gas line and vapor line running from the tank to the canister. The canister is maybe 6" diameter by 10" high made of black plastic. Thus, 72 wouldn't use a vented cap when new. Lots of the parts were tossed over the years... This is the wrong year, and isn't right, but it has pics of the general look of the canister... http://www.ebay.com/itm/NOS-FIREBIRD...item3ce1ac275b Last edited by franken; 05-22-2014 at 08:21 PM. |
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05-22-2014, 09:52 PM
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#6 | |
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Registered User
Join Date: Oct 2009
Location: Great White North
Posts: 1,520
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Re: Which gas cap, vented or not?
Quote:
__________________
Jeff. '72 Blazer K5 "Camshaft opinions are like belly buttons; everyone has one and no two are alike" My Blazer Build: http://67-72chevytrucks.com/vboard/s...d.php?t=626752 My Engine Build: http://67-72chevytrucks.com/vboard/s...d.php?t=637336 |
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