I am installing a 6system aqua-alarm on my
engine, and when closely examining the block for where I could tap into the
water cooling system to install the new temperture sending unit I found what appears to be four factory temp. units already in place. In the front of the
engine above the
water pump there is a housing that connects the
pump to the
heat exchanger and there are two with wires hooked up to them. Behind the
fuel pump where the block
water drain is there are two more with wires hooked to them, they appear to be tapped into the
cooling water gallery.
Oil sending unit is on
oil filter housing and there is another sending unit with wires to air intake manifold, I don't have either cold sart, glow plugs, or preheat combustion chambers. New engine out of factory with 300hours. If these arn't sending units then what are they??? john.