Heat Riser Diaphram Q
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pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
Heat Riser Diaphram Q
Hi,
I'm new here but am following the heat riser & vacuum leak threads closely. I have an '87 250 w/ 460, but 4v, so I thought this Q would be better answered on this board.
Seeing Franklin2's reply to 'emissions on a '86 f250' saying he has just hooked up one of these aircleaner housings.
I wonder where one could find this snorkel mounted "diaphram motor". Motorcrafts website gives me a p/n of CX149 or OE# E4TE 9D604 CA / D7AZ 9D612 C, both of which are obsolete.
And in my case both this and the other "fresh air" diaphram on the DS of the air cleaner are leaking like sieves.
This other one 'fails' open, I'm assuming so that it pops open @ WOT (no vacuum) allowing underhood air into the housing. BUT is this one part of the aircleaner housing? I can't find it listed anywhere. I suppose I could pop rivet the hatch shut and plug the vacuum line but I'm **** about stuff working as it should.
BTW my Truck's now old enough to drink, and has just rolled 300k
TIA for any help in locating these!
Jim
I'm new here but am following the heat riser & vacuum leak threads closely. I have an '87 250 w/ 460, but 4v, so I thought this Q would be better answered on this board.
Seeing Franklin2's reply to 'emissions on a '86 f250' saying he has just hooked up one of these aircleaner housings.
I wonder where one could find this snorkel mounted "diaphram motor". Motorcrafts website gives me a p/n of CX149 or OE# E4TE 9D604 CA / D7AZ 9D612 C, both of which are obsolete.
And in my case both this and the other "fresh air" diaphram on the DS of the air cleaner are leaking like sieves.
This other one 'fails' open, I'm assuming so that it pops open @ WOT (no vacuum) allowing underhood air into the housing. BUT is this one part of the aircleaner housing? I can't find it listed anywhere. I suppose I could pop rivet the hatch shut and plug the vacuum line but I'm **** about stuff working as it should.
BTW my Truck's now old enough to drink, and has just rolled 300k
TIA for any help in locating these!
Jim
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Joined: Jan 2001
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From: Virginia
I don't know where you would get a new one. If the one sticks shut, then apparently the diaphragm is ok. It may have a mechanical problem, or you might have the vacuum lines reversed on the temp sensor in the aircleaner. When it sticks shut, take the vacuum line off(with the engine running). If the door opens, then you might have the vacuum lines on backwards. When the temp sensor tells the door to open, it relieves the vacuum to the atmosphere.
The junkyards are full of them. What I usually do is get a aircleaner, and if it's a little different on the housing, but the snorkel is the same, I just grind the rivets off the main housing and take the snorkel off and swap it onto my old housing, using bolts to bolt it to the other air cleaner.
The junkyards are full of them. What I usually do is get a aircleaner, and if it's a little different on the housing, but the snorkel is the same, I just grind the rivets off the main housing and take the snorkel off and swap it onto my old housing, using bolts to bolt it to the other air cleaner.
Thread Starter
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pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
Thanks for your reply Dave,
Perhaps I wasn't clear.
I've had the air cleaner off tracing low vacuum. I've applied vacuum *directly* to both 'vacuum motors' in this air cleaner w/ my Mightyvac, and both leak. The flaps move but don't 'pull down' and then bleed back to 'open'. I have a separate temperature sensor for each one, the lines aren't backwards. The lines to both are plugged off for now.
So i'm not only not getting heated air from the EX manifold shroud but the other side of the air cleaner housing is always open to the engine compartment.
I can't expect 21 year old rubber not to be perforated and have since located the snorkel side "pot" on a mustang site.... for $60.
Junkyards around here don't seem to keep carburetted anything, they drain the gas and tip it right into the shredder.
The Drivers Side diaphragm is located inside a plastic scoop on the side of the air filter housing but I don't see a separate p/n on it.
I'll try calling some junkyards out of the area.
Thanks
Perhaps I wasn't clear.
I've had the air cleaner off tracing low vacuum. I've applied vacuum *directly* to both 'vacuum motors' in this air cleaner w/ my Mightyvac, and both leak. The flaps move but don't 'pull down' and then bleed back to 'open'. I have a separate temperature sensor for each one, the lines aren't backwards. The lines to both are plugged off for now.
So i'm not only not getting heated air from the EX manifold shroud but the other side of the air cleaner housing is always open to the engine compartment.
I can't expect 21 year old rubber not to be perforated and have since located the snorkel side "pot" on a mustang site.... for $60.
Junkyards around here don't seem to keep carburetted anything, they drain the gas and tip it right into the shredder.
The Drivers Side diaphragm is located inside a plastic scoop on the side of the air filter housing but I don't see a separate p/n on it.
I'll try calling some junkyards out of the area.
Thanks
Thread Starter
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pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
Found it!
Wish I found Bill/numberdummy's post #10 on the '73-'79 board to the 'check valve' thread on Saturday.
Ordered from Y2K today for $24.60.
You guys on this forum are AMAZING!!!!
Thanks,
Jim
Ordered from Y2K today for $24.60.
You guys on this forum are AMAZING!!!!
Thanks,
Jim
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