AMICI
We have a TR3 race car which keeps loosing water from the radiator and we
don't know why any thoughts from the collective wisdom of FOT
Problem:
too much water/coolant pumped out of radiator
only occurs on circuit with long straight.
never overheats or runs too hot
low water warning light comes on towards end of race, ( situated bottom of
header tank extension)
leak down test 98% seal
head pressure tested
recovery cap (6 and 12 lb) fitted to header tank, overflow to recovery tank
(Morris 1100), drains into bottom of recovery tank, and overflow to catch
tank(open to atmosphere)
initially, fluid ran from recovery tank to overflow catch tank, and then
vented all over engine.
radiator serviced, obstruction in tubes found and cleared, catch tank no
longer overflowed.
i.e. less fluid leaving cooling system
using 5 blade improved impeller pump, no thermostat (1" restrictor plate,
bypass occluded)
w/pump rotates at less than, or at most, equal to engine speed
running at approx 6500rpm down straight
at race end, after cool down, recovery tank empty (to level of recovery
intake pipe, recovered) and overflow catch tank is full (approx 400-500ml),
unable to be recovered.
Theory: water pump putting too much water into header tank on long run at
6500rpm, escapes via recovery cap.
But, not explained-- the level in the header tank remains low.
Any advice welcome
Geoff Byrne
TR6 Racer down under
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