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#27879 02/11/2005 5:44 PM | Joined: May 2004 Posts: 150 Wrench Fetcher | | Wrench Fetcher Joined: May 2004 Posts: 150 | My heat riser valve wasn't stuck, but it didn't have a spring. So, after purchasing one and installing it, the tension keeps the valve in the "heat off" position, meaning the exhaust is directed out the exhaust pipe and doesn't circulate to heat the carb and manifold.
It's my understanding that the goal of the riser spring is to keep the valve in the "heat on" position upon starting the engine and, once it and the heat riser spring warms up, the flap opens and exhaust is directed out the exhaust pipe.
However, my flap starts, and stays, in the "heat off" position. I've installed it exactly as pictured in the manual.
Any suggestions? Thanks. | | |
#27880 02/11/2005 10:34 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Take it off & turn it over.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
#27881 02/11/2005 11:09 PM | Joined: May 2004 Posts: 150 Wrench Fetcher | | Wrench Fetcher Joined: May 2004 Posts: 150 | Has anybody else done this, installed the spring opposite of the picture in the manual? | | |
#27882 02/11/2005 11:11 PM | Joined: May 2004 Posts: 150 Wrench Fetcher | | Wrench Fetcher Joined: May 2004 Posts: 150 | P.S. My initial post was incorrect...the spring holds the valve in the "heat on" position. | | |
#27883 02/11/2005 11:18 PM | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | My bro & I both tried the way the manual shows, its wrong. I installed it opposite the manual(63 GM truck), now it works fine. Brian | | |
#27884 02/12/2005 12:50 AM | Joined: May 2004 Posts: 150 Wrench Fetcher | | Wrench Fetcher Joined: May 2004 Posts: 150 | Actually, putting the spring on backwards wouldn't make any sense. By doing so, it would hold the valve in the "heat off" position when starting the truck...of course, it needs to be in the "heat on" postion at that point.
If the spring was installed backwards (contrary to the picture in the manual) the valve would never have a chance to close and heat up the intake manifold and carburetor. | | |
#27885 02/12/2005 4:41 AM | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | All I know is I put it on opposite the manual pic(maybe the negative got reversed) & it is closed when cold, springs open under acceleration,& its open when warm. It should hold the counterweight up when the engine is cold. Brian | | |
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