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Honzoo Follow-Up


thiggy's Avatar
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Join Date: May 2002
Posts: 718
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04-26-07, 07:24 PM   #1  
Honzoo Follow-Up

See my post on 4/24. I have pulled the head on the engine and discovered the cause of the frozen exhaust valve was because the valve guide had moved out of position. It had risen up enough (toward the valve cover) to keep the valve from opening, thus the bent push rod. Does anyone have any idea what might have caused the guide to slide? It was very firmly positioned when I drove it out. It was not damaged and the mating surface of the head was good, so I chilled the guide in the freezer and heated the head with a torch then pressed it back into proper position.

 
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cheese's Avatar
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04-27-07, 12:45 AM   #2  
Generally heat is the reason for valve guide movement. Are the cooling fins on the head caked with grass or oily debris? Is the engine shroud in place, and fan intact on the flywheel?


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04-27-07, 04:32 AM   #3  
Yes, there was a good bit of airflow restricting debris around the head and cowling. I have cleaned this up and will be reassembling the engine, assuming I can purchase a new pushrod. I'll post back with my progress.

 
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04-28-07, 08:29 PM   #4  
For my reassembly, I need to know what to torque the head bolts to, as well as the valve lash and spark plug gap. The owners' manual for this engine does not give this info and I don't particularly want to spend about $30 for the service manual, just for these three items. As previously stated, it is a Honda, GX140. Thanks.

 
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