My '88 Escort (518,500 miles) has been using more oil than usual lately. I know it has some sludge problems and think maybe the rings are coked. Anyone have any suggestions of what might be used to clean this up without engine dis assembly. The car can still be driven like this and the car isn’t …

The Marvel oil or any light viscosity oil or trasmission fluid might help. I have done that soak down many times on all sorts of engines and never seen any damage done. The usual procedure has been to remove all the plugs, pour several ounces of oil into each cylinder, lay a shop rag loosely over th…

There are additives in a bottle at the parts store that are sold specifically for this purpose. It’ll do absolutely no harm to try some. I doubt of pouring Marval Mystery Oil in and letting it sit will do anything. It isn’t a solvent. But I gotta tell ya, at 24 years and 518,500 miles, it may be fu…

An oil product may soften the coke, but as soon as you start the engine, it too will coke as it has no where to go. Use a solvent product instead, like SeaFoam or kerosene.

I agree the cylinder walls and the rings both probably have significant wear contributing partially to the oil consumption, but since it seems to have increased noticeably over just the last few thousand miles and the engine has had some previous sludge problems I thought maybe the rings were also c…

I’ve used Seafoam many times to decarbonize coked up piston rings with success. Get the engine up to operating temperature and shut the engine off. Remove the vacuum hose from the brake booster. Adapt a hose that’ll fit in the brake booster vacuum hose and into the can of Seafoam. Take a pair of pl…

If the rings are worn, stuck due to past overheating, or the engine has glazed and/or egged cylinder walls then no additive will help. The compression at approx 150 is on the way down but that’s to be expected. It’s amazing the compression is that high considering the total miles on the engine.

I don’t think sucking it (sea-foam) into a running engine will do ANYTHING except blow 98% of it out the exhaust and make a lot of smoke… Rotate the engine to TDC, then 90 degrees more, to position all the pistons at mid-point in their bores…Remove the plugs and introduce 3 or 4 ounces of Sea-Foam …

Keep the ideas coming. Right now I’m not driving the car much, waiting on warmer weather so I can get outside and work with it trying to give the engine a good internal cleaning, pull and clean the oil pan and do an oil/filter change. At the mileage I’ve got out of this engine and the condition of…

I like Seafoam but use it at night or call the fire department first. It’ll smoke like crazy and all the neighbors will think your garage is on fire.

Coked Piston Rings?

Maintenance/Repairs

the_same_mountainbike February 15, 2012, 4:17am 6

There are various products on the shelves. I’m reluctant to suggest a brand name, since I don’t use them. They’ll tell you on the bottle that they’re for decoking engine insides.

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Coked Piston Rings?

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