Gary Lewis Posted April 28, 2018 Share Posted April 28, 2018 I had already started the engine at that point for the hot check, will do it next time. Took it out for a highway cruise, runs like a clock as usual, shifts perfectly. It's incredible that this 33-year old vehicle has perfectly working cruise control. Only complaint is the low oil pressure at hot idle but not much to be done about that, will throw some Rislone in it and hope for the best. Crankcase pressure is high, blow-by to the airbox and out the PCV valve hose etc. I wish I had the time, money and place to really dedicate to rebuilding the engine, body etc. For now, it's just a camping truck for 1-2 seasons of the year. Be careful with the Rislone. In my experience it thins oil and cleans things. So, I'm not sure I'd use it for low oil pressure. Nor on an engine that might be really dirty inside - assuming the transmission's lack of maintenance is any indication. David/1986F150Six had an instance last fall where his clean oil over the years stripped the sludge out of the engine and partially plugged the oil pump's pickup screen. So you want to go slowly on the cleanup. Link to comment Share on other sites More sharing options...
1986F150Six Posted April 30, 2018 Share Posted April 30, 2018 Be careful with the Rislone. In my experience it thins oil and cleans things. So, I'm not sure I'd use it for low oil pressure. Nor on an engine that might be really dirty inside - assuming the transmission's lack of maintenance is any indication. David/1986F150Six had an instance last fall where his clean oil over the years stripped the sludge out of the engine and partially plugged the oil pump's pickup screen. So you want to go slowly on the cleanup. Apparently, the displaced sludge was lurking somewhere and when the fuel pump started leaking internally, the gasoline caused the sludge to break loose and as I drove, the sludge blocked the pickup screen for the oil pump. Link to comment Share on other sites More sharing options...
Gary Lewis Posted April 30, 2018 Share Posted April 30, 2018 Apparently, the displaced sludge was lurking somewhere and when the fuel pump started leaking internally, the gasoline caused the sludge to break loose and as I drove, the sludge blocked the pickup screen for the oil pump. But, now it is clean inside. Link to comment Share on other sites More sharing options...
1986F150Six Posted May 1, 2018 Share Posted May 1, 2018 But, now it is clean inside. And, with new oil pump, new pickup tube and screen, new fuel pump and updated oil pan gasket [1 piece] from fuel injected 6 cylinder! Link to comment Share on other sites More sharing options...
Gary Lewis Posted May 1, 2018 Share Posted May 1, 2018 And, with new oil pump, new pickup tube and screen, new fuel pump and updated oil pan gasket [1 piece] from fuel injected 6 cylinder! Sounds like it is ready for an extended trip - in September. Link to comment Share on other sites More sharing options...
1986F150Six Posted May 1, 2018 Share Posted May 1, 2018 Sounds like it is ready for an extended trip - in September. Good Lord willing, we [my truck and I] will be there! Link to comment Share on other sites More sharing options...
mp470 Posted May 8, 2018 Author Share Posted May 8, 2018 Be careful with the Rislone. In my experience it thins oil and cleans things. So, I'm not sure I'd use it for low oil pressure. Nor on an engine that might be really dirty inside - assuming the transmission's lack of maintenance is any indication. David/1986F150Six had an instance last fall where his clean oil over the years stripped the sludge out of the engine and partially plugged the oil pump's pickup screen. So you want to go slowly on the cleanup. You're probably right, I may just skip it and keep feeding it the good Castrol 10w30 high mileage. Link to comment Share on other sites More sharing options...
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