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Joined: Mar 2018
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Is there a write-up anywhere on total emission systems removal? For example what can be removed, what needs to be plugged or capped off, any replacement parts needed? I bought my 75 specifically because it's smog exempt but the engine bay looks like a cluster-f. I'll save the planet the 29 days a month I'm not driving the truck.
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Mountain Pass
Joined: Jun 2016
Posts: 168
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I didn't remove anything, pulled the motor cause son blew it. The only emission stuff on the motor is that smog pipe and egr plate. Whoever had it before me must have got rid of all of it except what I listed. I am going to go back with aluminium intake and won't put the egr plate back on. I suppose I will try to see if matching shop will plug the hole where pipe went.
Lead Driver
Joined: Jul 2017
Posts: 9,576
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From: San Jose, CA
I hate to be the one to suggest one more layer of hassle, but things like that are actually very sellable at the right time. Most of it got tossed, but as soon as someone tries to register a '76 or later truck in CA they're SOL on getting it smogged if they can't find the replacement parts.
So with trucks being so popular these days, more and more people are looking for that kind of thing.
Paul
So with trucks being so popular these days, more and more people are looking for that kind of thing.
Paul
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Post Fiend
Joined: Jun 2003
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From: Black Hills of SD
I think the front of the head has the same holes only blocked so you can see what size of welch plugs you need to block the holes. It's been a long time but I think I plugged some off in the car by just using a piece of strap with a hole drilled for the bolt and sealer.
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Ford Parts Specialist
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From: Simi Valley, CA
Since I don't know the year or engine size, I cannot post the parts catalog pic.
Logistics Pro
Joined: Jul 2005
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That is an Upstream Air tube. Smog pump sends air to the heads until warmed up, and then the air gets routed Downstream to the exhaust/converter.
The hose with clamps and large bolt aren't necessary because they're connected to a check valve which prevents exhaust leaks - unless the check valve is bad.
I've never seen one like that, and I can't tell how it's fastened to/at the heads. There's almost no way that both bolt-head-ends could thread into both heads, but they look like the heater hose 'rail' on an EFI 5.0 SBF - and that does thread into the lower intake on those engines. Maybe one side threads in, and the other is merely pushed in? I don't see any retaining bolts on either side.
On the SBF heads you can thread a spark plug into the hole on the heads. Or you can cut the head ends off of the tube and bolt them on backwards, and they'll plug the holes good enough.
The hose with clamps and large bolt aren't necessary because they're connected to a check valve which prevents exhaust leaks - unless the check valve is bad.
I've never seen one like that, and I can't tell how it's fastened to/at the heads. There's almost no way that both bolt-head-ends could thread into both heads, but they look like the heater hose 'rail' on an EFI 5.0 SBF - and that does thread into the lower intake on those engines. Maybe one side threads in, and the other is merely pushed in? I don't see any retaining bolts on either side.
On the SBF heads you can thread a spark plug into the hole on the heads. Or you can cut the head ends off of the tube and bolt them on backwards, and they'll plug the holes good enough.
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