1980 truck with AC. Has anyone done it? Looks like an eliminator bracket/pulley would be needed to tension the belt.

Why do you want to remove the smog pump? It doesn't hurt anything and is actuallly very beneficial to cleaning up the exhaust. Plus it is a Federal crime to remove any emisions equipment on your vehicle.

The smog pump has very very very little draw on the power of the engine, about as much as an idler pulley. Just leave it hooked up.

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Casually looking for a Clifford hyperpak intake for cheap.

It chirping pretty bad. Probably will seize soon.

Ive done it, I can provide pict. if you like. Easy

Sure thanks, I need to deal with it soon.

Just get a new smog pump….

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Casually looking for a Clifford hyperpak intake for cheap.

I'm not getting any vacuum at the EGR port on the 1945 carb, so it never worked anyway.

Doesn't necessarily matter that you aren't getting a vacuum on the port on the carb. Dpending on the system, there y or may not be a vacuum operated diverter or relief valve on the smog pump. On diverter valves, the output form the smog pump is directed to an upstram port or a downstream port on the exhaust. Essentially before the cat or directly into the cat. When no vacuum is applied on a diverter valve, the default is to inject the output of the cat to the downstream port, or directly into the cat. This is a good thing. Most of the time the injection is downstream (direct into the cat) anyway. Upstream injection is only used when a motor is cold.

New pumps are available from Rockauto for $48 for the Federal Emissions package or $76 for the California emissions package.

Alternatively, go to the junkyard and grab a pump off of any Mopar with a non-siezed smog pump and use it. You can bolt your diverter/purge valve to the new/used smog pump and all will be well. The smog pumps are all pretty much identical across years and engines.

Also, the EGR port has nothing to do with the smog pump system anyway.

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Casually looking for a Clifford hyperpak intake for cheap.

I learned by trolling the salvage yards that many of the early slants ( prior to smog pumps ) used an idler pulley similar to this one used here when vehicle was equipped with A.C.

There was also an idler pulley used on the mid eighties ( at least ) slant trucks but I cannot remember the reason or particular combination of accessories that would have called for it.

I found one of these mid eighties trucks with this pulley, took it my local Napa and they matched it. 12 bucks maybe. Not worth running an old pulley with the original un-serviceable bearing in my opinion.

I then fabricated the spacer you see behind it. Nothing very high tech but it works like a charm, use the slot in the smog pump bracket for adjustment.

I still plan on getting around to doing something with the bracket to make it more appealing to look at but havent made it that far.

Let me know if you need measurements or better pictures.

Hey thanks 1930. I don't get to the boneyard too often, but when I do I'll look for that pulley. for now...

Reed, I ordered the air pump from Rockauto. $48 + 9 ship