[Healeys] Glycol in oil (David Lodge)

[Michael Salter]

Very interesting Wayne, I  test for a head gasket leak opposite way.
Remove the radiator cap and fill the radiator (preferably with water only
to prevent antifreeze spilling everywhere).
Remove the rocker shaft (usually easier than trying to back off the tappet
adjusters) then install an adaptor a spark plug hole and attach an air line
(120 p.s.i.) to the adaptor. When the air pressure is applied to the
offending cylinder the radiator water level rises until bubbles start
appearing.
This test however won't really identify
Roger's issue because he has coolant leaking into the oil, a leak which is
much harder to track down.

M

On Fri., Nov. 17, 2023, 9:24 p.m. Wayne Schultz via Healeys, <
healeys at autox.team.net> wrote:

> 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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