one more heat riser question
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one more heat riser question
I patched the hole on the side of the valve now im afraid the valve is stuck either open or closed how can I tell I dont want to drive around with it stuck shut Im sure thats not good for it I tried to manually open or close it with the rod on the side but its all rusted broke and binded up.What will it hurt if it is stuck shut?
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Joined: Nov 2003
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From: Kalispell, MT
if you're talking about the heat riser flap in the exhaust manifold...yes, it will hurt your engine if it's stuck shut...mine was turning my exhaust manifold red-hot, and then the pivot pin for the flap fell out, leaving a nice 9/16"-ish hole in the manfold...don't know if it still gets red-hot, but any time i'm idling, and the exhaust can escape under the hood, it looks like i have a fire under there...but it's just the exhaust exiting thru that hole...it'll warp your valves and probably a number of other things if it gets outta hand...fix it soon...i'm just flat replacing mine...
MontanaFord
MontanaFord
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Usually, they rust shut in the closed to the intake manifold position. That's because it is shut most of the time. No it will not hurt your engine if it is rusted in the closed position. It will just take you much longer to warm-up in the morning and you may possibly have some carburator icing.
I am not sure what the cause of the "red hot" manifold may be.
The heat riser acts like a valve to open the exhaust manifold to the bottom of the intake manifold just to add some heat for cold starts. Open or closed should not effect the exhaust.
I am not sure what the cause of the "red hot" manifold may be.
The heat riser acts like a valve to open the exhaust manifold to the bottom of the intake manifold just to add some heat for cold starts. Open or closed should not effect the exhaust.
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we must be talking about different parts this valve is located at the bottom of the exhaust manifold it connects one end to the exhaust manifold the other to the exhaust pipe if anybody knows the one Im talking about and knows how to tell if its opend or closed please let me know Im scared to drive it and I just bought it.the bolts are rusted bad i cant budge them Im sure if I force them there going to break and then I got to fight with broken bolts if the valves open Id rather just leave it alone for now
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The heat riser valve is where the exhaust pipe connects to the manifold.
There may be a big sheet metal shield hiding it.
With the engine OFF and COLD, reach back in there and see if you can swivel something. If something swivels, that is good....the valve opens and closes.
If nothing swivels, probably rusted. If rusted with valve open, no problem, you just have a slower warmup. If rusted with valve closed, I'd have a muffler shop try to swivel it around so it isnt closed all the time.
I wouldn't have them do much more cause the bolts will break....labor $$.
There may be a big sheet metal shield hiding it.
With the engine OFF and COLD, reach back in there and see if you can swivel something. If something swivels, that is good....the valve opens and closes.
If nothing swivels, probably rusted. If rusted with valve open, no problem, you just have a slower warmup. If rusted with valve closed, I'd have a muffler shop try to swivel it around so it isnt closed all the time.
I wouldn't have them do much more cause the bolts will break....labor $$.
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Its Not Going To Swivle The Way I Patched It Up.i Just Need To Know If Its Open Or Closed Do You Think The Pipe Behind It Will Be Cooler Than The Pipe On The Passenger Side If Its Closed Not Letting Exhaust Through They Dont Meet Together Untill A Couple Of Feet After The Valve?
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More Turbo
Joined: Mar 2002
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From: Easthampton, Ma.
When the motor is cold, the valve is closed forceing the majority of the exhaust from the 4 cylinders on that side thru a port in the intake manifold under the carburetor and out thru the other head then into the passengers side exhaust manifold then out that side exhaust (whew!)
The heat from the exhaust under the carb keeps the atomized fuel (from the carb) from condensing in the intake manifold when the motor is cold. This helps cold weather driveability.
It does not delay the warm up of the motor, however it does add heat to the carb choke allowing the choke to open uniformly with engine temperature.
This reduces emissions and fuel consumption.
There are 3 ways to tell if your butterfly valve is closed (at this point)
1 is to remove the exhaust "y" pipe and have a "look see"
2 is to vice grip the shaft and turn it back and forth, you should be able to hear the difference (closed or open)
3 is to pay someone to do it!
It is not good to continously operate the vehicle in this condition, however intermittant usage should not cause damage only until the repair can be performed!
Good luck!
Steve G.
The heat from the exhaust under the carb keeps the atomized fuel (from the carb) from condensing in the intake manifold when the motor is cold. This helps cold weather driveability.
It does not delay the warm up of the motor, however it does add heat to the carb choke allowing the choke to open uniformly with engine temperature.
This reduces emissions and fuel consumption.
There are 3 ways to tell if your butterfly valve is closed (at this point)
1 is to remove the exhaust "y" pipe and have a "look see"
2 is to vice grip the shaft and turn it back and forth, you should be able to hear the difference (closed or open)
3 is to pay someone to do it!
It is not good to continously operate the vehicle in this condition, however intermittant usage should not cause damage only until the repair can be performed!
Good luck!
Steve G.
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