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Jim Sower <canarder@frontiernet.net> wrote:
... Blowby from
compression and/or combustion gasses forcing air into the coolant system ...
How long would it take a coolant pressure gauge to pick up on that one??
That partly depends on how close your cap pressure is to the actual operating pressure. It shouldn't take long at all for an compression/exhaust leak to raise coolant pressure to the cap pressure. So the change in coolant pressure should be notable.
An easy sanity check is a variation on Perry Mick's method, put a go/no-go "fluid level" detector in the overflow bottle (not the recovery tank). It should normally be empty, or nearly so. Exhaust in the coolant will fairly quickly push some liquid past the pressure cap and trigger the sensor. Late 80's GM V-6's commonly use such a sensor near the top of the radiator tank - I think the current cost is about $35.00.
Dale R.
COZY MkIV-R #1254
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