exhaust control valve
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Junior User
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exhaust control valve
Is it possible to find a new exhaust control valve? Or just the thermostat part?
The thermostat spring is missing from mine, so the valve is alway open. I have been having some trouble with faulty acceleration from idle when the engine is cold. I think the exhaust control valve is supposed to help with fuel delivery at cold engine temperatures.
The thermostat spring is missing from mine, so the valve is alway open. I have been having some trouble with faulty acceleration from idle when the engine is cold. I think the exhaust control valve is supposed to help with fuel delivery at cold engine temperatures.
Elder User
Joined: Dec 2006
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From: Redondo Beach, CA
Don't know of anyplace that has a Heat Riser valve for a Y-Block but perhaps you can find another to fit. Maybe from a FE?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Is it possible to find a new exhaust control valve? Or just the thermostat part?
The thermostat spring is missing from mine, so the valve is alway open. I have been having some trouble with faulty acceleration from idle when the engine is cold. I think the exhaust control valve is supposed to help with fuel delivery at cold engine temperatures.
The thermostat spring is missing from mine, so the valve is alway open. I have been having some trouble with faulty acceleration from idle when the engine is cold. I think the exhaust control valve is supposed to help with fuel delivery at cold engine temperatures.
COTE-9A427-A .. Heat Riser Valve / Obsolete
1960/64 F100/700 292 2V
NOS PARTS LTD in Waxahachie TX has ONE = 972-937-2201.
Logistics Pro
Joined: Jan 2002
Posts: 4,907
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From: suburban atlanta
In my experience, they generally rusted either open or closed. If yours is free, you could rig a manual choke cable to operate it remotely. Personally, I'd invest in a good thermostat, and leave it open.
If rusted closed, you force 1/2 of the exhaust gas to pass through the crossover in the intake manifold.
tom
If rusted closed, you force 1/2 of the exhaust gas to pass through the crossover in the intake manifold.
tom
Logistics Pro
Joined: Jan 2002
Posts: 4,907
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From: suburban atlanta
You cannot buy the spring. You were touted a source for a replacement. I suggested a manual operation alternative.
YOu have 3 choices.
do nothing
buy a replacement & install it
rig a workaround
and I suppose, you could take it out altogether. So 4 choices I can think of.
The ones I have seen have a weight that tends to open the valve. The spring gets WEAKER when warm, I think it is a bi-metal, and closes the valve with not much force when cold.
You are lucky it is free to move. Most are rusted into one position.
A 5th choice would be to scour junkyards for another valve. I have nothing else to add.
YOu have 3 choices.
do nothing
buy a replacement & install it
rig a workaround
and I suppose, you could take it out altogether. So 4 choices I can think of.
The ones I have seen have a weight that tends to open the valve. The spring gets WEAKER when warm, I think it is a bi-metal, and closes the valve with not much force when cold.
You are lucky it is free to move. Most are rusted into one position.
A 5th choice would be to scour junkyards for another valve. I have nothing else to add.
Last edited by tomw; Jun 13, 2014 at 08:03 AM. Reason: correction
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Thread Starter
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Junior User
Joined: Aug 2011
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You cannot buy the spring. You were touted a source for a replacement. I suggested a manual operation alternative.
YOu have 3 choices.
do nothing
buy a replacement & install it
rig a workaround
and I suppose, you could take it out altogether. So 4 choices I can think of.
The ones I have seen have a weight that tends to open the valve. The spring gets stronger when warm, I think it is a bi-metal, and closes the valve with not much force. You are lucky it is free to move.
A 5th choice would be to scour junkyards for another valve. I have nothing else to add.
YOu have 3 choices.
do nothing
buy a replacement & install it
rig a workaround
and I suppose, you could take it out altogether. So 4 choices I can think of.
The ones I have seen have a weight that tends to open the valve. The spring gets stronger when warm, I think it is a bi-metal, and closes the valve with not much force. You are lucky it is free to move.
A 5th choice would be to scour junkyards for another valve. I have nothing else to add.
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Thread Starter
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Junior User
Joined: Aug 2011
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Well you posted that as the spring gets warm it closes the valve. I think that is backward. The valve is supposed to be held closed when the engine is cold and as the engine and the spring warm up the valve opens. I was trying to point that out without being rude. Did I get that wrong?
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