Update On My Valve Sticking Motor

Russ/40

Russ/40

Well-known member
If you recall, I got my engine running in my 29RPU. After having run it with the carb that was running very rich several times trying to get a nice idle, it developed a bad clanking sound which accompanied a very rough running motor. It would run OK for awhile then run terrible with the noise that was there only when it ran poorly.

Well I pulled the motor and tore it down for inspection. The only thing I found that was suspect was a couple valves had a fair amount of carbon buildup on the stems. There was no galling anywhere. Since it was apart, I pulled the double nut lifters and replaced them with the single bolt type. I also honed the guides for the exhaust valves a little so they would be a little looser than the intakes, as the spec calls for the exhausts to be a little looser. Put it all back together and fired her up today with a properly setup carb. Ran it at high RPM to break in the new lifters, and she ran real nice. I'm thinking I should re-torque the head and cover the chassis, putting it aside to begin work on the body, resisting temptation to run until I can drive it. Some day....... Needless to say I'm feeling much better about things. Now the sheet metal. Thanks to those who gave me encouragement.
 
On my rebuilt engine the valves were a bit sticky so I added Marvel Mystery Oil in the tank and ran some straight through the intake manifold wiper fitting. I had to do this 2 or 3 times on different days but after that nothing is sticking now. Good luck on the rest of your restoration.
 
The reason I tore my engine down, was a pretty high dose of MMO in the fuel did not free up the problem.
 
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