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Old May 25, 2008 | 09:55 PM
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83maverickf-100's Avatar
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valve cover sludge?

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
 
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Old May 25, 2008 | 10:10 PM
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Short trips, infrequent oil changes and poor crankcase ventillation = Sludge.
 
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Old May 25, 2008 | 10:47 PM
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stepped on regularly too "clean up" and oil changeged every 3000-3500
 
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Old May 25, 2008 | 10:47 PM
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Engines get old, valve covers leak. Pull the valve cover, replace the gasket, reseal.
 
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Old May 25, 2008 | 10:51 PM
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did that yesterday lol forgot to mention
 
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Old May 25, 2008 | 11:02 PM
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but i do only drive all of ten miles a day
 
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Old May 25, 2008 | 11:10 PM
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TheL36Driver
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From: St. Joseph, Mo
Originally Posted by 83maverickf-100
but i do only drive all of ten miles a day
There it is dude. You don't get it up to operating temperature long enough to 'burn off' the moisture build up from combustion byproducts.

Start changing oil about every 2K miles and use Shell Rotella. JM .02

Canada = Cold...............................Don't help either.
 
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Old May 25, 2008 | 11:31 PM
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does run about an hour or two at a time on weekends not enough? does synthetic help
 
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Old May 26, 2008 | 03:27 AM
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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.
 
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Old May 26, 2008 | 08:18 AM
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Originally Posted by 83maverickf-100
did that yesterday lol forgot to mention
Sorry maverick, I thought you meant sludge on the outside, not underneath. As far as that goes I agree with everyone else's comments.
 
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Old May 26, 2008 | 10:11 AM
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From: St. Joseph, Mo
Originally Posted by srercrcr
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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Old May 26, 2008 | 09:15 PM
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no problem fmc400 honest mistake didn't cost me anything
 
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