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I am changing valve seals. I have only done this on motorcycles before and the collets (labeled locks in my attached image) typically come free as the spring is compressed.
The sleeve is staying tightly attached to the collets/locks when I compressed the spring.I am not able to free up the collets. I tried pushing them off with a flathead screwdriver and tapping them with a small punch. The valve moves too much when I apply any force. I am using chord in the cylinder to keep the valve up. Is there a trick to separating the sleeve from the locks?
I figured it out, I just turned the engine harder into the chord i had stuffed into the cylinder. With firm resistance against the valve, I could wack the top of the spring compressor with my palm. These seals just float on the valve shaft and are not fixed to the valve guide? hmm.
Compressed air works best to hold the valves closed. And you get to hear whether you have any leaky valves at the same time. But with your method you don't run the risk of one falling in the hole.
Good tip. yes, my first attempt was with air pressure. I was losing pressure way too fast. This is my cheap attempt to fix a smoking issue, but with leaking like I am seeing I don't have much hope it will be the cure. Even without the air loss i don'it think air would stand up to the amount of downward force i need to get the little sleeves loose.
Take the spring compressor off use a socket or suitable sized other item that will sit on the sleeve but not the locks then give it a sharp quick whack with a hammer this will free them up. Do this with the piston at or near TDC in that cylinder then if you happen to jump the locks out you wont lose the valve down the hole. Also don't hit it so hard you drive the valve in to the piston.
Thanks! That's basically what I did, but had chord stuffed in the cylinder. I am buttoning it all up tonight.....keeping my fingers crossed I got it all right. I also did the intake manifold seals. I assume a tune-up will be helpful
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