"Perry Templeton" wrote:
1988 Astro Van. Began running hot.
At speed, temp is normal..stopping at red lights, overheats.
No water in the oil. Faint aroma of coolant when overheating.
Water pump, fan clutch, thermostat, radiator & cap all good.
Loses a gallon of fluid in 25/30 miles. Don't know where it goes.
No puddling under vehicle. No trail of fluid.
My husband says crack in the head, and fluid is vaporizing out.
Or possibly a crack in the block. ANY IDEAS? Perry.
Also classic symptoms of failed head gasket.
Borrow radiator pressure tester from auto parts store.
Remove radiator cap, screw on tester and pump it up
to 16 PSI. Let it sit and watch the pressure gauge.
If the pressure bleeds down there is a leak somewhere.
If no fluid is seen, then leak is into engine from
1.) failed head gasket, or;
2.) head crack, or;
3.) block crack (least likely)
Coolant aroma is hot coolant vapor boiling up from
Wendy & John