Quote:
Originally Posted by fstrnldr
Why would you need to block off a portion of the cooler (in cooler months) when the GTM has a thermostatic adapter. If you are running a straight adapter like most of the cheap ones you find, then yes you can over cool the oil, but a thermostat is designed to open and close based on temperature. It will just be closed more often in the winter than the summer. That being said, i would go w/ the larger unit.
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Apparently you did not bother reading the link I referred you to regarding how thermostatic plates work. External coolers with thermostatic plates are always circulating as Steve mentioned. From the Mocal site (and my oil cooler DIY):
Quote:
Mocal oil thermostats are designed to regulate oil flow
through cooling devices until optimal (minimum)
temperatures are reached. Cold oil enters the
thermostat and is bypassed through the center of the
unit returning to engine (figure 1). During warm-up
the thermostat never closes off oil flow to the cooler,
rather, it offers a less restrictive path for the oil to flow*
allowing the cooler to acclimate to system
temperature. As oil warms to 180 degrees (200 in high
temp versions) the operating "waxstat" closes the
bypass permitting full flow to cooler (figure 2).
*percentage of oil bypass can vary up to the point
where the bypass is closed and full flow to the cooler
is achieved.
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This is to prevent thermal and pressure shocks from compromising the cooler. Temps below 50 degrees or so will need a shield to keep the oil temps in a 180+ range. This is also outlined in my DIY.