use of a car engine in conditions where the oil cannot reach its correct working
temperature will cause sludge formation and crankcase oil
dilution, leading to excessive wear especially in the cylinder bores. Optimum
engine power will only be delivered at correct temperatures. The elimination
of drag in engines caused by cold oil is a most important consideration, especially
with a racing engine, revving the engine without a load will not put much heat
into the oil and devices for preheating the oil may not be available.
It is therefore desirable to control of the oil flow through the cooler by a thermostatic device, we call an oilstat, set to divert oil to the cooler at 80ºC (although a wide range of settings is available for special applications). This is the minimum temperature required to evaporate and dispel contaminating substances.
The Mocal oilstats
|The OT/1 can be supplied with push on fittings for 3/8" or 1/2" bore hose only and is designed for smaller engines with relatively low oil flows. Dimensions|
|The larger OT/2 can be supplied with any form of push on or threaded connection, male or female. Dimensions|
bodies of the these units are die cast aluminium. Control is by a "waxstat",
a mass produced item built to highest standards. They are light enough to be
supported by the hoses, however a bracket is supplied with the slightly heavier
OT/2, if further restraint is required.
The oilstats should only be used where oil cooling is adequate, the sensing device will suffer permanent damage above 140°C, replacements are available.
Last Revised: 16 May, 2001 Copyright © 1999 Think Automotive Ltd. All rights reserved.
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