What is this??
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Senior User
Joined: Apr 2002
Posts: 115
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From: Morgantown US
What is this??
Last night I was pulling the intake off yet another 400 motor I got..under two smaller bolts was a 1 inch by 2 inch plate with a fairly thick coil thingy attached...what the hell is it?
Posting Guru
Joined: Aug 2000
Posts: 1,127
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From: (near) Denver USA
What is this??
rjcline,
That is the heat exchanger for the automatic choke.
Some Motorcraft 2150 2V carbs were equipped with an automatic choke thermostat that was warmed by air pulled through that coil, which is exposed to the hot exhaust gas in the intake manifold's exhaust crossover.
That is the heat exchanger for the automatic choke.
Some Motorcraft 2150 2V carbs were equipped with an automatic choke thermostat that was warmed by air pulled through that coil, which is exposed to the hot exhaust gas in the intake manifold's exhaust crossover.
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Senior User
Joined: Apr 2002
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From: Morgantown US
What is this??
I will assume since I didnt find one of these on my other three motors they all had manual chokes? I dont see how I could of missed them...sigh now Im confused..I thought a manual choke meant you had a **** in the cab of your truck you pulled when you were cold starting..
Oh well... thanks for the information! back to the study board I guess....seems like every day I find out 2 more things I need to know and dont!!
Oh well... thanks for the information! back to the study board I guess....seems like every day I find out 2 more things I need to know and dont!!
Posting Guru
Joined: Aug 2000
Posts: 1,127
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From: (near) Denver USA
What is this??
The Motorcraft 2150 2V carb used at least three or four different systems to warm up the automatic choke.
Those without the hot-air coil include:
1) All-electric chokes, heated only by electricity supplied from the alternator while the engine runs
2) Hot water chokes, heated by warm coolant in one of the heater hoses held against the side of the thermostat by a metal clip
By 1972, almost all light-duty trucks had automatic chokes.
I have never seen a factory manual choke on any M-block application, car or truck.
Those without the hot-air coil include:
1) All-electric chokes, heated only by electricity supplied from the alternator while the engine runs
2) Hot water chokes, heated by warm coolant in one of the heater hoses held against the side of the thermostat by a metal clip
By 1972, almost all light-duty trucks had automatic chokes.
I have never seen a factory manual choke on any M-block application, car or truck.
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Senior User
Joined: Apr 2002
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From: Morgantown US
What is this??
ok that makes more sense..my other motors have automatic chokes but heated in a different way. If you read this again and if you have time...
I always thought it would be cool to have the manual pull thingy for a choke...can it be done or is it too much of a pain to bother with?
Otherwise, thanks again for all the info!! :-)
I always thought it would be cool to have the manual pull thingy for a choke...can it be done or is it too much of a pain to bother with?
Otherwise, thanks again for all the info!! :-)
Posting Guru
Joined: Aug 2002
Posts: 1,214
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From: Minneapolis, MN
What is this??
[updated:LAST EDITED ON 11-Dec-02 AT 04:27 PM (EST)]There are manual choke conversions available and they work pretty well when they are set up correctly. The problem I have is I keep forgetting to open them up when the engine gets warm so the choke stays closed longer than necessary.
Good working automatic much less problematic IMHO.
Just my $.02
Greg
'77 F-250 Camper Special 400ci driver
'76 F-250 Supercab 360ci current project
'71 Mach I 429CJ in storage
'79 F-150 for parts
huct on foniks wurkt fer me
Good working automatic much less problematic IMHO.
Just my $.02
Greg
'77 F-250 Camper Special 400ci driver
'76 F-250 Supercab 360ci current project
'71 Mach I 429CJ in storage
'79 F-150 for parts
huct on foniks wurkt fer me
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Posting Guru
Joined: Aug 2000
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From: (near) Denver USA
What is this??
To answer your last question: yes and yes. It can be done, and it's too much of a pain to bother with.
I agree with macguyver. A properly functioning automatic choke is reliable and much less hassle.
I agree with macguyver. A properly functioning automatic choke is reliable and much less hassle.
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