on an 83 carbebed stock engine that has had yearly tune-ups all its life how much sluge should it have normally in the valve cover?
-tried a few system cleaners, before takeing off to clean
-the middle two cylender had the most sludge others had sludge free spots
-performance millage get back from cleaning? how much does sludge rob?
-never been off before either
-mean anything the middle was the dirtiest?
input apreiciated thanks
Synth does clean stuff out with time, but you may develop gasket leaks by switching over with high mileage. I like, but some don't, running a can of engine flush in the oil prior to dropping the oil out. Smells like kerosene to me, but with 5000 mile oil changes, you won't see any sludge under my valve cover.
Synth does clean stuff out with time, but you may develop gasket leaks by switching over with high mileage. I like, but some don't, running a can of engine flush in the oil prior to dropping the oil out. Smells like kerosene to me, but with 5000 mile oil changes, you won't see any sludge under my valve cover.
Back in the old days (pre 1970), the plan was to drain the oil and fill the engine completely with kerosene or diesel (remember $.15/gal diesel?). Run it at idle speed for fifteen minutes or so. Not in your driveway as kerosene would be puking out the oil fill. Refill with regular oil and change filter. (A '57 Desoto hemi takes a full 5 gallon can to fill.)
Another plan is to fill (to normal level) with ATF type F (whatever is cheap) and run it at light load (no trailer towing) for 100-200 miles and drain. Also works very well on lawnmower engines.
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