The smog pump on my Saleen got super noisy on the way back from Bellevue a couple weekends ago. I read up on them and everyone has their own opinion on what to do. People say to take them off and run a shorter belt. Others say reman ones are nothing but problems buy used. I still need to pass Oregon emissions so I still need it functional. Supposedly Ford used the same pump on many different models. Not sure about that. But I did have a couple smog pumps off 2.3l pintos. They are not the same as the 5.0. The housing is different but the guts inside are the same. Anyway the front bearing was bad on mine. I bought a new one that was made in Japan for under $8. Part number 6203-RS. I cleaned it out and lubed the other bearings while I had it apart. It’s back to normal now, no noise. You need to make a puller to get the front pulley off the shaft. I used a flat piece of steel plate and some longer bolts. Drilled the holes to match the pattern of the pulley bolts and just tightened the bolts down since the shaft sticks up above the pulley. You will need to use a nut or spacer on the top of the shaft once the plate/tool is flush with the pulley. Or else you will not be able to remove the pulley completely. Took me about an hour once I had the tool made. Hope this helps someone. Sure is lots cheaper than spending $180-$250 for a reman pump.
Here are some pictures of the Pinto smog pump.
This is the front bearing. This is what went out on me that I had to replace. This one is in bad shape as well.
Rear view of the bearing.
This is the drum assembly. It is the same as what is in the Mustang.
Rear view of the drum. You can see the large rear bearing and the smaller ones for the veins
This is the rear plate that the drum recesses into and spins on. .
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