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Joined: Jan 2002
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ChatMaster - 25,000
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ChatMaster - 25,000
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Without hearing it its kinda hard to tell but some times they just "do that".......Are the push rods spinning when the engine is running? (sometimes one or two will not) or you could try lubricating the valve guides with a light oil. Either pour the oil through the carburetor throat with the engine running ot squirt oil on the top of the valve guides by going between the coils of the valve springs. Also oil the sockets on the top of the push rods.
Gene Schneider
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Willwood Engineering
Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188
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Joined: Dec 2001
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ChatMaster - 10,000
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ChatMaster - 10,000
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Yes when there is a bit of valve sticking or there is a weak valve spring the valve will not come up as fast as the push rod is going up and down, then you will have that CLICK !
Life's a long winding trail, love Jesus and ride a good horse!
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Joined: Nov 2001
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ChatMaster - 15,000
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ChatMaster - 15,000
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The click on every other revolution (or less frequently) is likely a bent pushrod hitting the side cover. It is more of a clunk than a tick. It is easy to check to see if all the pushrods will rotate with engine idling or when not running and the rocker arm not loaded.
If you can't find the source of the sound then use a large screw driver or metal rod or automotive stethoscope. Put one end next to your ear and the other at various places on the engine. You will be able to hear many sounds typical of a good running engine. And occasionally hear a sound that is not normal and be able to pinpoint the location.
How Sweet the roar of a Chevy four!
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ChatMaster - 3,000
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ChatMaster - 3,000
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The click on every other revolution (or less frequently) is likely a bent pushrod hitting the side cover. It is more of a clunk than a tick. It is easy to check to see if all the pushrods will rotate with engine idling or when not running and the rocker arm not loaded.
If you can't find the source of the sound then use a large screw driver or metal rod or automotive stethoscope. Put one end next to your ear and the other at various places on the engine. You will be able to hear many sounds typical of a good running engine. And occasionally hear a sound that is not normal and be able to pinpoint the location. For me and my hearing, or lack thereof, I use a moderate length of garden hose, one end on the engine, the other end stuck in my ear.
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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ChatMaster - 15,000
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ChatMaster - 15,000
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Nearly anything that transmits the vibration will work. Just remember the first hearing aids were tapered animal horns. Then granny had one of those metal replacements.
How Sweet the roar of a Chevy four!
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ChatMaster - 3,000
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ChatMaster - 3,000
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Nearly anything that transmits the vibration will work. Just remember the first hearing aids were tapered animal horns. Then granny had one of those metal replacements. WHAT ? ? ?
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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Joined: Jan 2010
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Grease Monkey
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OP
Grease Monkey
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It turns out the number 2 intake valve must be slightly bent because it is the only one that does not turn. It also it the only one that does not have a flat rocker arm surface (dents the feeler gauge). I did have to redo some of my adjustments so now it sounds a lot better.
Since the engine seems to be running well is it better to leave the one valve alone or try to fix it?
Mike
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Joined: Feb 2008
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ChatMaster - 3,000
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ChatMaster - 3,000
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It turns out the number 2 intake valve must be slightly bent because it is the only one that does not turn. It also it the only one that does not have a flat rocker arm surface (dents the feeler gauge). I did have to redo some of my adjustments so now it sounds a lot better.
Since the engine seems to be running well is it better to leave the one valve alone or try to fix it?
Mike If you suspect a bent valve, I believe a compression test is in order, before any more engine damage occurs.
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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Joined: Jan 2002
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ChatMaster - 25,000
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ChatMaster - 25,000
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I would bet my life its the push rod that is bent. The valve probably stuck at one time and hit the piston. Without removing the head (and valve) there would be no way to tell if the valve is bent.
Take the push rod out and straighten it....roll it on a flat surface to test.
Gene Schneider
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Joined: Nov 2001
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Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
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The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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