I have a 1983 F100 with a 302 2bbl, 3 spd automatic. A while a go I needed to replace an emissions part. It is the metal pipe with a one-way valve that attaches to the exhaust manifold an has a hose to the air pump. On my 302, the metal pipe ataches directly to the exhast manifold on the passenger side. See my sketch... (my first time posting a picture... hope it works!)



This metal pipe rusted off and I needed a replacement. My dealer checked all his parts books and they do not show this configuration. All that is shown is a metal pipe that conects the two heads with the one-way valve attched to the middle of it.

Has anyone else have the same configuration as mine? If so, what year is it?

 

When I bought my 85 the air pump on it wasn't working. Well, since I'm not big on running that thing anyway, I got rid of it. The previous owner had already capped that line off where yours is rusting at. All I did was take it off at the manifold and put a large bolt in it's place. I used some High-temp permatex on the threads too.
That was a while ago though, I have since then put headers on and did away with the whole mess all together

 

So what you are saying is that I might have a newer 302?

Removing the air pump and blocking the hole didn't cause any problems?

 

Well, I didn't have the opportunity to see how the truck ran with the pump working, as I said I bought it after the pump was broke. The engine ran good and strong though without it. All I did was plug any stray vacuum lines and took that hose off all together. On my new motor that I just put in there I didn't hook any of that stuff on it either. I put headers on and cut that bracket where the old air pump was (to save some wrench room) and it too runs strong. I think all that air pump did was to help with emissions, but I'm pretty sure if you plug all the holes and remove it, you wont have any problems.
Now, just make sure you're in a state where you can do that and not get in trouble for it. Here we don't have any smog inspections so I don't need to bother with it. I doubt that whole air pump mess did that much to begin with, except bog your motor down and make you burn more gas to get the same horsepower out of it than you would with the pump on and working. IMHO...


edit: I'm not sure what years had the air pump on them, but is yours carburated or fuel injected? I think 85 and 86 was an option to have one or the other, 87 was when all of them were fuel injected. Don't quote me on that though. So, if yours is fuel injected than I would say it ws a newer motor. Nevermind, you said no O2 sensor, so it must be carburated then. Sorry, I don't know if yours had the pump on it that year or not.

 

I live in Nova Scotia Canada where to date, we don't have any emissions inspections... yet. Bu the time they get to it, my truck will be so old it will be excempt.

 

"I doubt that whole air pump mess did that much to begin with, except bog your motor down and make you burn more gas to get the same horsepower out of it than you would with the pump on and working. IMHO..."

Well, it's designed to introduce oxygen in the exhaust to promote further burning of the gases in the exhaust to reduce emissions. Some of the systems also introduce air into the catalytic convertor to aid in the combustion of gases there too.

Well, enough of that. It will work without it, but if you have inspections, you might get nailed for it being gone(rejected). If you are handy, maybe you can repair it or solder a new one out of copper tubing or something.

 

Well, my local mechanic did jury rig it by welding it to the manifold and it will hold for a while. Some day I will have to deal with it again. I don't have a converter so that is not an issue.

I am not to worried about the pipe is there or not, the question is why is my engine different than all the reference manuals for a 1983 302? How can I identify what year it is?