Get the keepers off the valve stem

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?

Reply to
William Oliveri
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Assuming the head is OFF the vehicle........

Tap the valve upward with a soft mallet to break it loose.

Jerry

If the head is ON the vehicle, then I am confused.

Reply to
Jerry Newton

Reply to
L.W.(ßill)

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?

Thanks,

Bill

Reply to
William Oliveri

Reply to
Steve G

Reply to
L.W.(ßill)

Looks to me like the seals are holding position on the valve stem, not remaining down against the head.

I'm using nylon rope which is less prone to knot (I hope, I hope, I hope).

Thank you for the good luck wish. Later, when I can invest in an air compressor I can do it more safely.

I wonder what they cost to rent.

Bill

Reply to
William Oliveri

What type of interface would you use to add compressed air to the cylinder?

Thanks,

Bill

Reply to
William Oliveri

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.

Chris

Reply to
c

Reply to
Steve G

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.

Thanks for the great info.

Bill

Reply to
William Oliveri

Thanks for the excellent ideas and links

Bill

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Reply to
William Oliveri

Head is on the vehicle. What is the source of your confusion?

Reply to
William Oliveri

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.

Reply to
Paul Calman

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.

A typical all in one tool looks sorta like this:

Reply to
L0nD0t.$t0we11

Reply to
L.W.(ßill)

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.

Reply to
L0nD0t.$t0we11

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