I have been tinkering on a 1960 Panhard PL17, a former rally car, obtained in a horse trade with another local SDC member. It has a 2-cylinder opposed, air-cooled engine, and is front drive.
Anyway, I was able to get it started, but it ran poorly. The left side cylinder mostly didn't fire, and would only kick in at higher RPM, and made a vicious clatter when it did. Certainly sounded like sticking valves. The valves are in a hemi-head layout, worked by pushrods, and have torsion bars for valve springs. I tried pouring various oils and solvents down its little 2-barrel carbatooter, but nothing seemed to help.
So I bought a spray can of Sea Foam engine cleaner-outer. Got the little motor fired up by priming it; there is no choke at all, and it was idling away on one cylinder. Spayed a little Sea Foam in the carb, and braaak, clatter, the other cylinder kicked in, and then quit again. Sprayed a bit more, and it kicked in, and stayed in, although there was still clatter. Sprayed a bit more, and the clatter eventually went away completely, and the engine idled smoothly, aside from a random miss in the right cylinder. I let it run for about 5 minutes, and shut it down. Will try it again tomorrow. I used less than half the can of Sea Foam, so if it's sticky again tomorrow, I can dose it up again.
But I was amazed at just how quickly, and how effectively the stuff worked. I will definitely be buying another can to administer to the TR6 I have down in Arizona, which also has a sticky valve issue.
Anyway, I was able to get it started, but it ran poorly. The left side cylinder mostly didn't fire, and would only kick in at higher RPM, and made a vicious clatter when it did. Certainly sounded like sticking valves. The valves are in a hemi-head layout, worked by pushrods, and have torsion bars for valve springs. I tried pouring various oils and solvents down its little 2-barrel carbatooter, but nothing seemed to help.
So I bought a spray can of Sea Foam engine cleaner-outer. Got the little motor fired up by priming it; there is no choke at all, and it was idling away on one cylinder. Spayed a little Sea Foam in the carb, and braaak, clatter, the other cylinder kicked in, and then quit again. Sprayed a bit more, and it kicked in, and stayed in, although there was still clatter. Sprayed a bit more, and the clatter eventually went away completely, and the engine idled smoothly, aside from a random miss in the right cylinder. I let it run for about 5 minutes, and shut it down. Will try it again tomorrow. I used less than half the can of Sea Foam, so if it's sticky again tomorrow, I can dose it up again.
But I was amazed at just how quickly, and how effectively the stuff worked. I will definitely be buying another can to administer to the TR6 I have down in Arizona, which also has a sticky valve issue.
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