The Ford Barn

Clem Clement · 10-28-2018, 07:36 AM

We were flogging a 29 with a frozen clutch and a no-start situation. We fed the starter 12 volts and the engine would start, increase rpm and die. I was using my bare hand over the carb intake to help with the gas flow. this was working and the engine was warming up. After a minute or so of this " choking" procedure I noted the exhaust pipe at the manifold was beginning to glow red.
I quickly remove my hand.

We diagnosed the situation as a stuck open exhaust valve resulting with gas burning in the exhaust pipe. It cleared up shortly thereafter and ran well.

Was I damn lucky???

We pushed the car into a storage trailer for the winter.

eagle · 10-28-2018, 07:52 AM

Timing issue can cause the same thing. Also a bad intake gasket can do that.

Patrick L. · 10-28-2018, 08:24 AM

Lucky ? I think you found the problem and probably didn't cause any damage. Thats a good thing. You didn't mention how you fixed the hung valve. I think many of these old critters have had hot manifolds over the decades.

Paul Bjarnason · 10-28-2018, 09:19 AM

Yeah, you were lucky, Clem. That's odd! Valves don't hang up for no reason, of course -- do you know why the valve hung up? Running too lean a mixture would also cause an over-heated exhaust pipe. Having a leaking gasket around the carbie would result in a too-lean condition -- or just mis-adjusting the mixture.

100IH · 10-28-2018, 11:33 AM

Clem, put a vacuum hose on it to check for restricted exhaust.

Bill Cal. · 10-28-2018, 03:44 PM

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If the timing is retarded it will run extremely hot.

Clem Clement · 10-28-2018, 09:03 PM

very lucky the gas did not explode due to a loose exhaust gasket. Car had run up till this summer. All too busy to do the exploration study work. Valve loosened up after the engine run. MMO added in heavy dose to the gas tank.

Tom Wesenberg · 10-29-2018, 12:18 AM

This crap gas we have to use these days will make valves stick. I always mix 4 ounces of MMO with each 10 gallons, and that helps a lot.

When I hear about a glowing manifold, the first thing I think of is late timing.

Purdy Swoft · 10-29-2018, 10:11 AM

Same thought here !!!

1931 flamingo · 10-29-2018, 12:06 PM

Were theere any weemmen around when this happened Clem?? Any beer??

.

Paul

Patrick L. · 10-29-2018, 12:54 PM

Well, I would have thought the same about the timing, but, he said he found the problem to a hung valve and fuel burning in the manifold. Now we hear about a loose manifold. Oh well.

Clem Clement · 10-29-2018, 02:09 PM

No beeeerz . I miss wrote. The manifold to exhaust connection was not tight. On a backfire exhaust gas emitted from the joint. The redness showed in the exhaust pipe. Daytime operation

Purdy Swoft · 10-30-2018, 10:33 AM

If the points gap is less than .018 eighteen thousants , it will have a retarding effect on the timing. Too little gap at the points causes the points to open later . Retarded timing reduces power and causes overheating .

10-28-2018, 07:36 AM	#1
Clem Clement Senior Member Join Date: May 2010 Location: Fairfax, VA Posts: 3,393	Red hot exhaust pipe We were flogging a 29 with a frozen clutch and a no-start situation. We fed the starter 12 volts and the engine would start, increase rpm and die. I was using my bare hand over the carb intake to help with the gas flow. this was working and the engine was warming up. After a minute or so of this " choking" procedure I noted the exhaust pipe at the manifold was beginning to glow red. I quickly remove my hand. We diagnosed the situation as a stuck open exhaust valve resulting with gas burning in the exhaust pipe. It cleared up shortly thereafter and ran well. Was I damn lucky??? We pushed the car into a storage trailer for the winter.

10-28-2018, 07:52 AM	#2
eagle Senior Member Join Date: Aug 2011 Location: Eagle Bend, MN Posts: 2,025	Re: Red hot exhaust pipe Timing issue can cause the same thing. Also a bad intake gasket can do that. __________________ "There are some that can destroy an anvil with a teaspoon and shouldn't be allowed to touch anything resembling a tool."

10-28-2018, 08:24 AM	#3
Patrick L. Senior Member Join Date: May 2010 Location: Largo Florida Posts: 7,225	Re: Red hot exhaust pipe Lucky ? I think you found the problem and probably didn't cause any damage. Thats a good thing. You didn't mention how you fixed the hung valve. I think many of these old critters have had hot manifolds over the decades.

10-28-2018, 09:19 AM	#4
Paul Bjarnason Senior Member Join Date: Jul 2018 Location: Annandale, VA Posts: 150	Re: Red hot exhaust pipe Yeah, you were lucky, Clem. That's odd! Valves don't hang up for no reason, of course -- do you know why the valve hung up? Running too lean a mixture would also cause an over-heated exhaust pipe. Having a leaking gasket around the carbie would result in a too-lean condition -- or just mis-adjusting the mixture.

10-28-2018, 11:33 AM	#5
100IH Senior Member Join Date: Dec 2011 Location: SW Idaho Posts: 970	Re: Red hot exhaust pipe Clem, put a vacuum hose on it to check for restricted exhaust.

10-28-2018, 03:44 PM	#6
Bill Cal. Senior Member Join Date: May 2010 Posts: 174	Re: Red hot exhaust pipe Sponsored Links (Register now to hide all advertisements) If the timing is retarded it will run extremely hot.

10-28-2018, 09:03 PM	#7
Clem Clement Senior Member Join Date: May 2010 Location: Fairfax, VA Posts: 3,393	Re: Red hot exhaust pipe very lucky the gas did not explode due to a loose exhaust gasket. Car had run up till this summer. All too busy to do the exploration study work. Valve loosened up after the engine run. MMO added in heavy dose to the gas tank.

10-29-2018, 12:18 AM	#8
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Red hot exhaust pipe This crap gas we have to use these days will make valves stick. I always mix 4 ounces of MMO with each 10 gallons, and that helps a lot. When I hear about a glowing manifold, the first thing I think of is late timing.

10-29-2018, 10:11 AM	#9
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: Red hot exhaust pipe Same thought here !!!

10-29-2018, 12:06 PM	#10
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,390	Re: Red hot exhaust pipe Were theere any weemmen around when this happened Clem?? Any beer?? . Paul

10-29-2018, 12:54 PM	#11
Patrick L. Senior Member Join Date: May 2010 Location: Largo Florida Posts: 7,225	Re: Red hot exhaust pipe Well, I would have thought the same about the timing, but, he said he found the problem to a hung valve and fuel burning in the manifold. Now we hear about a loose manifold. Oh well.

10-29-2018, 02:09 PM	#12
Clem Clement Senior Member Join Date: May 2010 Location: Fairfax, VA Posts: 3,393	Re: Red hot exhaust pipe No beeeerz . I miss wrote. The manifold to exhaust connection was not tight. On a backfire exhaust gas emitted from the joint. The redness showed in the exhaust pipe. Daytime operation

10-30-2018, 10:33 AM	#13
Purdy Swoft Senior Member Join Date: May 2010 Location: Alabama Posts: 8,099	Re: Red hot exhaust pipe If the points gap is less than .018 eighteen thousants , it will have a retarding effect on the timing. Too little gap at the points causes the points to open later . Retarded timing reduces power and causes overheating .