Marvel oil has been used by pro's,and amateurs for years. The "New Kid In Town",sounds like "Kroil". I,myself haven't used it,but from what I hear,it "creeps' into rusted rings,like no other product. I had a '49 Studebaker 2-ton,with a flathead 345. I used Marvel,tranny fluid,Diesel fuel,and WD-40,mixed in a "cocktail",and only #5 was stuck. I kept trying to break that engine loose for two years,and finally gave up. A year later,is when I heard about "Kroil". not saying that it would've freed that engine,but I sure wish I tried that,before scrapping that engine. Depending on the condition of your pistons/rings,you MAY be able to free the engine,and use it,without a tear-down,and re-build. Let your engine soak for a couple of days,then try and rock the flywheel back and forth,with a pry bar. Check your 33 and #4 pistons,while applying pressure,to see if you're gaining any movement. If yooooooou don't get results,give the cylinders another dose of "Marvel",and let sit for another couple of days. Try again. If no movement,take a 2X4,cut about a foot long. place on top of the cylinder,and tap it with a 16 0z. hammer,to loosen the rust around the rings,and help the "Marvel" creep into the rings. if the pistons still refuse to budge,you can drop the oil pan,remove the caps from the stuck pistons' connecting rods,and try and drive them upwards,using a chunk of broom handle,and a mallet.You'll need to ream the ridges off of the affected pistons,so you'll be able to remove them,hone the cylinder walls,and install new rings.Good news is,a tight engine will get stuck long before one with worn rings,so hopefully you'll get lucky. Hope this helps.
Last edited by wetwilly5757; 08/07/2014 4:13 AM.
