I'm changing out my valve stem seals on my 83 CJ7 258. I have the spring compressed but I can't get the head of the valve to come up so I can get the keepers off. Seems stuck. I tried grabbing it with a pair of needle nose but no luck. Anyone have an idea on what to do here?
No, I don't have an air compressor. I pushed rope into the cylinder and turned the crank to hold up the valve. You mean you pop the top of the spring. So you don't use the spring compressor to get the keeprs out? Only to put them in?
You can kind of kill two birds with one stone if you plan on doing more engine diagnosis in the future. You can just build a cylinder leakdown tester similar to what's on this page:
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You can use that to hold the valves in place. Just crank the regulator wide open. If you don't need this, you can use the tip on that page for an adapter. Just a gutted spark plug with a hose CRIMPED on to it. I wouldn't use hose clamps for this, but that's up to you. Otherwise, you can go to an auto parts store and get a short hose that has the correct ends on it already, similar to this:
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This will adapt a standard pipe thread on the air hose to the spark plug thread.
Krap, that's a great idea. I have a compression tester I bought at the flea market for a couple of bucks and the hose comes right off. I'll take that and get a fitting for the compressor. I might be able to borrow one from my maitanance dept at work.
My Snap-on comp tester's connector matches my air lines. Make sure and remove the schraeder valve, and that the piston is at bdc, or it will spin the engine.
You need a valve wrench. Should be available at an auto or bike parts store. The simplest ones look like small metal valve caps with a metal extrusion with a slot across it and a hole at the end to bleed air. These used to be pretty common and actually used as valve caps until the smartalecs started using them to remove the valve under them. Now most come with a loop for attaching to a key chain.
The bigger type is a more specialized tire tool, has the same valve wrench on it, but has the ability to be cocked to the side at 90 degrees for leverage, like a breaker bar. Some even have a torque wrench built in for accurate seating of the valves.
Well, I guess it depends if you are trying to remove engine valves or tire valves... or not particularly paying attention to the subject line, or haven't had enough caffeine after lunch. Or are just having yet another "duhhhhh" moment since I allegedly drink enough caffeine to prevent Alzheimers for an entire army.
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