[Healeys] Glycol in oil (David Lodge)

[Wayne Schultz]

My path to locate the leak is to pressurize the cooling system to about
        14 PSI (1 BAR) and see if it leaks down. I use a cooling system
pressure tester for this. I then use a small endoscope inspection camera to
inspect all of the bores with the plugs removed looking for coolant leaking
into the cylinders. You might not see coolant  in the cylinder ,but if one
piston is very clean compared to others that is suspect. If that is
inconclusive I then drop the oil pan looking for coolant drips into the oil
pan area. The last hard to find leak was behind the middle tappet cover.
The raised boss in the block  was porius and only leaked into the oil pan
area when the engine was cold.  When the engine was hot and expanded there
was no leak. The next day when cold it would drip several  drips per hour.
Both of these inspections are less invasive than pulling the head, which is
my final inspection looking for the source. good luck.
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