Take a pipe nipple that fits the block where the sending unit is screwed in. Braze the end shut that goes in the block put a coupling on the nipple and tighten it in as though permanent. Mark the nipple for top (high point toward the sky) and remove it and drill a 1/8" hole on the side with the mark (off center to assure air gets out). Turn it back in (with sealer) and put the coolant back in till it fills the coupling. Then install the dending unit (again letting air out till only coolant is leaking before tightening. This should isolate the unit from swings in temp and air bubbles. Cheap and easy!! Jim
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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