Wednesday, Jul 02, 2014 at 18:31
fisho64 posted:
"I dunno why people do it hot"
"perhaps a good example is what happens when you wash a big load of dishes in the sink, let the water sit for a few hours then pull the plug."
Fisho..
An engine is not a sink with food scraps or a bath with animal fat soap.
In your scenario, every time the engine sits and cools, a new layer of "whatever" forms on the bottom of the sump...how then is that reinvigorated and included into the engine oil ready for removal when pulling the sump plug with hot oil?
Same with oil baths, ie..camshafts...your scenario indicates it will eventually fill with "whatever".
Modern oils hold carbon/soot and corrosive combustion by-products in
suspension and it is also captured by the filter medium.
Contemporary electronic managed high pressure fuel systems and computer managed ignition/timing systems keep even diesels very clean internally these days.
The time that contaminants and moisture do separate and adhere in an under-serviced or mechanically damaged engine is actually during engine operation and temperature, and with a hot engine, it is vapourisation that occurs...and guess where that goes...the same place the steam does in your sink of hot water... up to the ceiling....top of the engine, valve/rocker cover.
Take the lid and bottom off a few modern maintained engines..Fisho, there is not the settled accumulation you fear downstairs.
FollowupID:
819221