Smog Pump maintenance
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Senior User
Joined: Feb 2004
Posts: 250
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From: Nanticoke
Smog Pump maintenance
My smog pump locked up on me the other day and took a severe toll on the belt and power. I got another one from the junkyard then took the seized one apart. The new one also sqeals a little. Low and behold, these pumps are just simple vane pumps with two rubber or long lasting material that goes around in a circle. Anyway, I found it beneficial to spray in some PB blaster or silicone spray in the inlet. This took away the sqeak and a low viscosity oil may also be able to penetrate the rear bearing. I wouldn't recomend spraying much in at a time or it should probably be done while the motor is running until the pump is only pumping to the atmosphere after warm up. There is no way to build up any considerable pressure to cause ignition inside this pump unless the bearings are excessively hot.
Elder User
Joined: Apr 2004
Posts: 970
Likes: 3
Yes but if you live in a state like PA anything that was on the vehicle for emmission purposes must be there. In answer to your maintenance question not a thing can be done, the bearing on the drive end is prelubed. The small needle bearings on the vanes are lubed with seals on either side of them. I believe if my memory serves me each vane carries three bearings. The problem is they injest water and it gets in and corrodes everything. The best of them were the early pumps with the centrifical intake set up right behind the pulley. Someone at GM decided they needed filters and mounted plastic cans with the hoses to the pump on the bottom so you could pop the cap and replace the filters. Ever bit of water was in the pump, and we bought a few pumps for those P30 till we got them inverted.
Kotzy
Kotzy
