Join Date: Jun 2001
Location: Central Minnesota
Re: Sludge in valve covers , where else ?
There are some very good engine flushes today that can help with sludge removal but nothing will be 100% without an engine tear down. Id drain the oil, put on a cheap Fram, Hastings filter and then 4 quarts of your favorite oil and a good engine flush and run it for an hour at high idle (1500) to get the engine good and hot. Then drain that oil, replace the filter with good high quality filter and your favorite oil again and check for leaks, tighten up pan bolts, valve cover bolts etc.. then run it for awhile. Make sure your PCV valve is clean or replace it anyway, they are cheap.
Short trips over the years with dino oils that never get hot enough to burn off hydrocarbons and lower quality oils will leave that sludge and varnish behind.
When converting to Synthetic they highly recommend the flushing method to help clean out the crud thats been accumulating inside.
Click..is Jim..former owner of a 69RS-LM1 350/255 - 700r
"There will come a time when you believe everything is finished,
That will be the beginning." Louis L'Amour