cooling
Bypass is not suction side, it is pressure because it is designed to blow bubbles off of cylinders and heads.
With a restrictor and no t-stat the bypass should be more of a hinderance than an asset ???
I disagree....
Without the bypass hose there is no way for coolant to circulate when the engine is cold and could possibly cause localized hot spot, or worse.. serious warpage/damage could occur.. I personally believe plugging the by-pass gains nothing except the chance to damage your engine.. Stagnant water in a running engine is NOT your friend.. and with alum heads, a deathwish..
EDIT I also think without a bypass hose,, the impeller would tend to cavitate when the thermostat is closed,, because of the inability to move any coolant,, and that would lead to other problems,,
The bypass hose sucks warming coolant from below the closed thermostat,, thru the bypass hose to the water pump
inlet,,which is the
forward chamber of the pump,, where you'll note, in pix,, the return heater hose and the bottom rad hose,, you know ,, the big hose that goes from the bottom of the rad that has the cooled coolant, (that gets sucked up to the pump when the t/stat is open),,
into the same forward chamber of the pump where the bypass and heater hose enter... The centrifugal force of the turning impeller, pulls (
sucks) coolant from the forward chamber, the impeller vanes throws coolant outward creating positive pressure pushing coolant into the outer passages of the waterpump/timing cover , again see pix, thru the cover it enters into the engine at the front of each cylinder bank,, see pix.. the coolant circulates thru the engine in the normal manner till it gets to the
closed t/stat,, where it Bypasses and returns warmer coolant to the suction side of the pump (forward chamber)..
In the Pix - Note the pieces of white wire I inserted to help visualize..
EDIT::
The last 2 pix demonstrate how to fashion a tool to insert down the bypass INLET, snag the impeller, then turn the fan, to eliminate a slipping impeller as a possible source of overheating,, saves taking the pump off,, as many do..
hope it helps
