Mishimoto Thermostatic Sandwich Plate, Gold

flashgordon · 05-02-2013, 07:08 AM

Quote:

Originally Posted by wstar

I had to double-check their site after I read your description, and sure enough it says "The built-in thermostat prevents oil flow to the cooler until the engine oil reaches activating temperature". This is not the same way the normal Mocal thermostatic sandwich plates (used by most of the vendor kits and the DIY types) work. The way those work is they leave both pathways open when cold, and then as you cross the thermo threshold they gradually close off the bypass, forcing all oil through the cooler at higher temps (it's about a 10 degree range while it slowly closes it off, but that's a minor point).

Yes, this is one of many reasoning that I did.
And also I add: The cold oil is more dense, so in a radiator can upwards the pressure, (for this a termostatic is mandatory!).
So Mishimoto can have the risk of a "block of concrete" in the radiator when it switches!

BUT!

The termostat core does not switch On/Off immediatly. Before Mishimoto I tested Mocal in a pot over my kitchen (Fortunately, I'm not married...) to see how a termostat works (with the fire very very low...)...
It takes a lot of secs and I think that the Delta Temps was almost a ten degrees....

In the first warm-up of my car (with the bumper off), I observed that the radiator start to heat up a lot of time before the gauge starts to go.
So I think that a little quantity of hot oil circulate always.
Mocal instead, leaves the main pipes opened at all time with a little bypass that closes when the temperature reaches the value.
This can cause a very (In winter very, very, very) slow warm-up.

Cold oil is dangerous as too hot oil!

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