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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

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  #1  
Old 08-17-2014, 06:17 PM
kduke kduke is offline
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What is this or name that part

Working on removing excess stuff from my truck, its been modified over its life and has lots of unused extras just left in place.

One was this hose with a spark plug shoved into the end of it

Click the image to open in full size.

When looking at it, it broke off at the other end...

Click the image to open in full size.

Bad photo but there is metal inside that end which came from...

Click the image to open in full size.

Now the question is, what is that? Its located at the rear of the engine, 460, and can be seen in this photo for reference

Click the image to open in full size.

I assume this isn't a mission critical part since it was so lovingly capped with a spark plug. Part of the factory ac? Has metal tubing come into and out the bottom of that piece, and the hose came out the top and went, somewhere...

The 460 isn't original, was put in who knows when since 1973, into my F250
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Old 08-17-2014, 06:24 PM
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i believe that is a one way valve for the smog pump that pumps air into the combustion chambers to reduce emissions. There should be a steel line that goes to the back of both heads and that valve is attached to it
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Old 08-17-2014, 07:03 PM
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Your bottom photo is the PCV. Positive crankcase ventilation. It's there to evacuate the fumes out of the crankcase. You don't want to plug it off or remove it.
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Old 08-17-2014, 07:23 PM
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I think he put the bottom pic to show where the piece in question goes. Look just past the PCV and you can see the can that the hose broke off from.

I was going to say emissions as well. I take all that crap off of my trucks. :P
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Old 08-17-2014, 07:30 PM
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Yeah right behind the pcv in the bottom photo you can see the part in question that broke. If is is part of the smog pump can you just remove all that and cap it off? Is it going to hurt anything having that piece exposed like that? Dirt and such getting into it, etc?
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Old 08-17-2014, 07:33 PM
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Emissions related. This is a 302, but you get the idea.
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Old 08-18-2014, 12:01 AM
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It's called a anti backfire valve if I remember correctly and was connected to the smog pump.
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Old 08-18-2014, 12:52 AM
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Thanks for the replies guys! After having a point of reference I found it and lots of info, and is indeed all smog related. My truck has had all that ripped off it so going to remove it and plug the holes in the heads.

Even found a post made by NumberDummy given the part number for the plug. http://www.ford-trucks.com/forums/81...block-off.html

Trying to dig around and find an answer to my next question but nothing yet, is it going to hurt anything driving with that open like that? I assume not since that was where emissions were pushed back out of the engine?
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Old 08-18-2014, 06:32 AM
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Plug the heads and scrap the smog pump,on some 460's they had 2 smog pumps and you should be good.If you really want to wake that motor up change the timing gears to an early70's timing gear set for a 429-460. I believe the where run straight up and yours has 4-7 degrees retard already built into it, unless it has already been changed.
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Old 08-18-2014, 10:03 AM
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Quote:
Originally Posted by OldMetal View Post
It's called a anti backfire valve if I remember correctly and was connected to the smog pump.
D4VY-9A487-A .. Exhaust Air Supply Check Valve

Misc 1974/79 300/302/351W (Econoline)/460 engines.
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Old 08-18-2014, 11:26 AM
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We're that pipe mounts to the back of the head, you would need a block off plate, bolts hold them on, I usually unbolt the pipe from the back of both heads, and cut the pipe off, mig or braze the pipe shut and remount the flange part of the tube back to the head, maybe someone made a block off kit like some fuel pumps but I doubt it. You will have to reuse the mounting part so be careful when you RIP it out.
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Old 08-18-2014, 01:33 PM
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No co425 back here in the red box....sorry had to.
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78 (79 headlights) 460 4 spd, 4", a/c and 35's
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Old 08-18-2014, 01:41 PM
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That's like a smack in the face, i hope he shaved. You got some nice looking rides there those late 70's were my favorite, My 86 did a great job, but from going from the 6.9 to the power stroke. WOW Click the image to open in full size.

.
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Old 08-18-2014, 01:49 PM
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Thanks, I love that body style too.

No, he has a good sense of humor, I hope.

He's off line now, so the fun part will be later, ya have to liven things up a bit every so often.
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77&79 F250 Rich & Penny
77 351M auto, a/c, add a leaf 33x12.50's
78 (79 headlights) 460 4 spd, 4", a/c and 35's
79 351M 4spd 6" Skyjacker Edelbrock-Holley-Hedman 35's
99 Ranger 4x4, 98 Expedition 4x4, 73 Bronco Hillbilly-Bug
71 Bronco 302 35" Boggers 5.58 gears spool/locker
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Old 08-18-2014, 01:52 PM
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You must know him, if that ain't bust'n ***** I dont know what is, but I like I like
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99 F-350 7.3 PSD 6" superlift springs, 35 toyo load E tires, true trac front, detroit locker rear, 140 gallons fuel, Desiel-site coolant filter, 6.0 trans cooler, BDS trans, Banks billet converter, Bank trans command, Banks turbo housing, wicked II wheel, big head waste gate, Power elbow, EBCV removed, diesel-o-rings in fuel bowl. 203 t-stat,TS Performance tuner, True 4" exhaust turbo back, More to Come when the funds come.
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Old 08-18-2014, 01:52 PM
 
 
 
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