Re: [Chrysler300] temperature gauge actual temperatures

OK, cars after the Model T ford may have had thermostats and some had water pumps. Some of the early cars did not have water pumps and the water circulated by heat convection through the radiator (hot water entering, forces the cooled water back into the engine.) (most tractors and small farm vehicles in China still, to this day, have this system some with an open top radiators for adding water.)

SO the cars after early teens of the 20th century had cooling systems with pump and radiator. Some had shutters in front of the radiator to raise the temp to operation specifications (some of these shutters were thermostatically controlled others were manual and took a long time to raise all the water to optimal temps.)

The in line coolant thermostat which appeared in the 1920's opens and closes to keep the water coolant above 180 degrees. When closed there is a by pass through the water pump to keep the water circulating in the block, until it does reach 180+. And a good oil (also a coolant) must reach 210+ degrees to do its job properly.

Second, the source of the Sludge in the oil you referred to, was a by product of non-detergent motor oil and no filters until the early 1960's. In a modern system using detergent oil, the impurities are either burned off (the smoke which comes out of your crankcase breather) or is captured in the oil filter (which was not standard in motorcars in the USA and an option in the late 1950's.) With non detergent oil the impurities precipitate out of the oil and stick to engine surfaces or in less turbulent areas like the bottom of the oil pan.

Hope you get this straight....too many voodo suppositions and probably's, blogging around.

From: mgoodknight@xxxxxxxx
To: jackcboyle@xxxxxxxxx
Cc: retromobilia@xxxxxxxxxxx, jkg@xxxxxxxxxxxxxxxxx, tonysru2@xxxxxxxxxxx, chrysler300@xxxxxxxxxxxxxxx
Sent: Monday, May 5, 2014 11:19:48 AM
Subject: RE: [Chrysler300] temperature gauge actual temperatures

I've never seen a cooling system design that provided for a thermostat that somehow blocked, or at even restricted bypass coolant flow as the thermostat opens. That said I'm unable to reason that it's possible for the engine temp to be higher without an installed thermostat than operating in the same condition with a thermostat. Yes, I run all of my equipment with the appropriate thermostat to aid in fast warm-up and to prevent sustained operation at low operating temperatures. Please note that most very old equipment especially tractors, old industrial engines, and even many old cars were never equipped with thermostats---probably one of the main reasons for much of the sludge buildup that we don't often see in the oil nowadays.

Marshall Goodknight