The Seafoam Procedure

69shocktower

Active Member
Nov 5, 2003
173
21
39
Dakotas
After sitting for a long time. Got it running. A loud metal flapping sound. from one side of the engine. Like cards in bicycle spokes. My friends dad said it sounded like a stuck hydraulic lifter, or a stuck valve or loose valve seat. The first test, fix. Add seafoam to oil, get engine to running temp, add seafoam to vacuum nipple on carb. Luckily was a gummed up lifter. Noise got smaller till went away completely. Amazing inventive fix. FYI. Also during have to idle fast enough to have enough gas to burn with all the seafoam going in. Filled the garage with burning seafoam smoke. Was totally cool cause it totally worked!
 
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You probably made a lot of smoke for no reason. Using the Seafoam in the oil would reach the lifters, rockers, rings, one end of the valves and more. A quart of Kero in the oil and idle before an oil change used to do the same thing with old oil.

Seafoam sucked into the intake might soften PCV deposits and maybe the junk on the back of the intake valve head.

So, that part probably fouled your plugs and looked cool while the stuff in the oil was working. A newer car's converter would not appreciate the Seafoam in the intake. It should burn if you put it in the fuel tank, but I am not sure why you want it there either.