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The reservior is recently replaced. There is a pressure release on opening the cap after a drive. Yet the coolant level can drop 1 to 2 inches in a day's time, with a 50-90 mile drive - sometimes.
Only Volvo antifreeze is used, diluted to 50/50 with distilled water. It's color is good, no clouding etc.
Looking all over for signs on a leak. Even put a large spread of newspaper under the car one night. In the morning it showed a leak, more damp than wet. Looked to be near the center of the car, but that's where the splash pan would direct it.
On every hose I can see a small encrustation as where coolant has dried up. It is on the end edge of the hose, not along it's length anywhere. I see this on the upper and lower radiator hoses, hose from reservoir, heater hoses, and oil cooler hoses.
By the way - I did not know this engine has an oil cooler. It is in the black colored housing that the oil filter mounts onto. There are two hoses, larger in diameter than the heater hoses.
Each hose goes to different connections into the cooling system on the right hand side of the engine. Both show signs that coolant has dripped onto them and dried there. One has a green-ish mark on its bottom side as if coolant had dripped off and left a colored mark.
One of the oil cooler hoses terminates into a connection that has a drain fitting and a pipe that connects to the engine with a 2-bolt flange. The area of the drain fitting is green-ish, but dry.
I have searched for leak signs after the car has come home after a 22-mile 65 mph commute so the system is still pressurized. So far nothing other than a low level on the reservoir. Two times we have seen coolant pooled under the car after sitting in a parking place for an hour or two. Cannot tell where it's from except that much of width of the upper side of the splash pan looks damp.
No signs of coolant in the cabin or out the exhaust. I have not checked the tranny fluid since the car has a no-handle tranny dipstick.
Any and all ideas will be most welcome by me (wife too, it is the wifemobile).
Thanks in advance,
Bob
:>)
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