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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Mar 2012 Posts: 19 New Guy | | New Guy Joined: Mar 2012 Posts: 19 | It wasn't pumping. Took it apart, cleaned, and reassembled. Put Marvel Mystery oil in inlet side. Pushed on lever and oil sucked in, but oozed back out. Loosened all 6 screws a little and it worked normal when I repeated the process. Tightened screws and it doesn't work. Loosened screws again and it works. When I took the pump loose from the engine, the lever didn't have full throw and when I pushed it in, it took several seconds for the lever to return back out. Is one of those little check valves messed up? Which one? Jim
1953 Chevy 3100 3 window
1997 VW Rialta Motorhome
2011 Fusion
| | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | You can buy rebuild kits that have the valves in it. Just rebuild it. That's a lot simpler than trying to figure out which one is bad. Besides if one is bad the other likely is as well.
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
| | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | I agree with Tiny, get a rebuild kit for it. The diaphragm is probably bad, the spring should be replaced. And the inside of it should be cleaned out properly. Unless you really want to keep the original pump you can probably go to NAPA and buy a replacement cheaper than messing with yours. Don | | |
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