Exhaust manifolds 100° difference
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From: Bismarck, ND
Pressure high in the fuel pump to carb line? If it's too high then the needle and seat can't hold the gas from entering the carb's bowl. And that fuel will come out the bowl vents. If you have an electric fuel pump then maybe the pressure regulator not working right. If mechanical pump then isolate heat from the pump to carb line. I have heard heat in the gas in that line, on the verge of vapor lock, can cause higher pressure.
On the different temp exhaust manifold, my 1st reaction was plugged,smashed, or kinked R/S exhaust pipe or muffler if you have duals. Did you run over something in the road recently?
On the different temp exhaust manifold, my 1st reaction was plugged,smashed, or kinked R/S exhaust pipe or muffler if you have duals. Did you run over something in the road recently?
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From: Bismarck, ND
I'll go have another look in a few as I just grazed over it when I looked earlier
Hotshot
Joined: Mar 2013
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From: Phoenix, Az.
Willow has a point here. The flap was on the right side of the motor if it had one. In it's own housing sandwiched between the exhaust manifold and the exhaust pipe. If it were closed or mostly closed it would try to send that side's exhaust under the carb and over to the left bank. This passage usually gets plugged up. So then the exhaust manifold tries to get rid of the exhaust but can't for the most part. That would heat it up.
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From: Bismarck, ND
Willow has a point here. The flap was on the right side of the motor if it had one. In it's own housing sandwiched between the exhaust manifold and the exhaust pipe. If it were closed or mostly closed it would try to send that side's exhaust under the carb and over to the left bank. This passage usually gets plugged up. So then the exhaust manifold tries to get rid of the exhaust but can't for the most part. That would heat it up.
Hotshot
Joined: Mar 2013
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From: Phoenix, Az.
Not necessarily. If your rig has one it is in it's own housing. Lawd knows if your engine and exhaust manifolds are factory original or something the PO installed. If it does indeed have one, disconnect the exhaust head pipe and remove the flap and housing (exhaust thermostat control valve) assembly from the exhaust manifold. Clean all the rust etc off it. Soak the shaft and bushings where it pivots with your favorite penetrant.
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From: Bismarck, ND
Not necessarily. If your rig has one it is in it's own housing. Lawd knows if your engine and exhaust manifolds are factory original or something the PO installed. If it does indeed have one, disconnect the exhaust head pipe and remove the flap and housing (exhaust thermostat control valve) assembly from the exhaust manifold. Clean all the rust etc off it. Soak the shaft and bushings where it pivots with your favorite penetrant.
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What is behind your suggestion to disconnect the fan?
Semper Fi
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From: Bismarck, ND
The fan blows cooler air over the manifold (mainly the driver side) so you'll get different results, but in my case it didn't affect it much
Lead Driver
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From: On the Edge of the Desert
I think we are chasing the wrong problem.
The hot manifold is not too hot, rather the other one is too cool.
So what would cause one manifold to be cooler? Usually Dead cylinders cause that. But he says their are no other issues.
So what else can cause a cold manifold?
The hot manifold is not too hot, rather the other one is too cool.
So what would cause one manifold to be cooler? Usually Dead cylinders cause that. But he says their are no other issues.
So what else can cause a cold manifold?
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From: Bismarck, ND
I think we are chasing the wrong problem.
The hot manifold is not too hot, rather the other one is too cool.
So what would cause one manifold to be cooler? Usually Dead cylinders cause that. But he says their are no other issues.
So what else can cause a cold manifold?
The hot manifold is not too hot, rather the other one is too cool.
So what would cause one manifold to be cooler? Usually Dead cylinders cause that. But he says their are no other issues.
So what else can cause a cold manifold?
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From: Bismarck, ND
Just to clarify, the readings I'm saying is taken at 2 feet from the Y pipe, it maintains a 100° or so difference on every measurement taken.