Secondary Air (Smog) Pump Guts
IF THE IMAGE IS TOO SMALL, click it.
The 2 rear vent holes visible in the upper right of the case allow penetrating oil to be used to free a stuck pump, and flowable grease to keep it moving. But if the cast Iron drum rusts too much, the pump must be disassembled & sandblasted to restore its movement. Graphite paint (like EZ Slide) can be applied where the drum rubs the case to prevent galling & seizing.
See also:
![pump2ndryopen.jpg Secondary Air (Smog) Pump Guts
IF THE IMAGE IS TOO SMALL, click it.
The 2 rear vent holes visible in the upper right of the case allow penetrating oil to be used to free a stuck pump, and flowable grease to keep it moving. But if the cast Iron drum rusts too much, the pump must be disassembled & sandblasted to restore its movement. Graphite paint (like EZ Slide) can be applied where the drum rubs the case to prevent galling & seizing.
See also:
[url=https://www.supermotors.net/registry/media/766465][img]https://www.supermotors.net/getfile/766465/thumbnail/02smogpump.jpg[/img][/url]](https://www.supermotors.net/getfile/1174874/fullsize/pump2ndryopen.jpg)