My old van seem to use anti-freeze like it's soda pop. I even had my
mechanic check to see if there's a leak somewhere, and he didn't find a
leak. So, does it just get used up and evaporate, or some other
Today, I filled up the radiator, plus I added more to the overflow
container. It took it quite a while before it finally put out any heat
from the vents, so at least my heat is working again.
I just checked the oil and it looked like oil should look, so I don't
My mechanic said he checked everything because I put it in the shop
specifically because I thought it had a radiator leak somewhere.
The thermostat gauge moves from cold to warm(er) as the engine warms up,
so that appears to be working as far as I can tell. The mechanic
checked that thing, too.
You need to look at the *drained* oil to see what sorts of stuff
puddles on top. Looking at the dip stick is like trying to
decide how many people are at a party by looking through the keyhole.
[OTOH, there's some stuff you can use to check for water in *fuel* -- by
running a dipstick into the tank. Not sure if it works for oil, though]
It's not the *gauge* but the actual thermostatic VALVE. Usually located
at the top of the block.
Nope , if there's coolant in the oil it will form an emulsion that closely
resembles grease . Other than that , antifreeze has some serious corrosion
problems with main and rod bearing inserts . Doesn't take a whole long time
to blow up the motor .
If the temp guage isn't going high it is inlikely to be overheating.
They will usually "bang" and make strange noises when they overheat
too - and the engine will "ping" under load when hot.
The biggest "tell" for antifreeze (or water) getting into the oil is a
white foamy deposit on the filler cap.
Anhydrous copper sulfate is white and will turn blue in the presence
of moisture but it doesn't work well in oil unless you can get it to
the bottom of the sump.
That's what was in the "waterchek" paste we used on the dit sticks for
the tanks at the gas station eons ago.
The oil leak is just enough to be irritating, but not enough to have to
add oil in it too often. I just added oil this time because it was just
a tad below full and I was already adding windshield washer fluid and
If an external leak is not obvious, and the oil is normal, then most
likely coolant is leaking into a cylinder and being burned out the
Have your mechanic do a compression test to look for a blown head gasket.
On Wednesday, December 2, 2015 at 3:15:29 PM UTC-5, Retired wrote:
and pressure test the cooling system.
replacce radiator cap with one that caan be pumped with pressure.
pump to say 30 pounds, then let it sit and see if pressure drops
had a van once that lost coolant, it was perfect when checked, but lost coolant when hot
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