My Continental IO-470 has a coolant leak

455 Bravo Uniform

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455 Bravo Uniform
Lol, made ya click.

For those of you who have not seen the amount of water created by combustion and condensation, this is the worst I’ve seen. It was after 1.5 hrs flight, cowl flaps closed after climbing, didn’t open again until taxiing back. Starting air temp -2F, at 5000 ft was -19F, and about 5F after landing.

That’s an oily piece of cardboard that would absorb more oil and shed water. The yellow is an emulsion of oil and water. This is the drippage from the breather vent. Flight was 2 days ago.

No wonder corrosion happens more quickly with cold operation (ground running) and aging oil. This oil has 12 hrs on it.

2D202289-7459-4AEA-8849-81C4B860E04F.jpeg
 
You need to plan for an emergency replacement of your muffler bearings, chrome work best.

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And they told us that oil and water don’t mix.

Don’t worry. Us Subaru owners usually get that from our head gaskets.

It’ll be fine, they said...
 
I' have seen similar on the dip stick of an O-360 lyc (Archer) in the winter. Never could get it up to temperature! (No the winterization plate was not on the oil cooler). Owner would not install same. Engine made TBO...

-Skip
 
(No the winterization plate was not on the oil cooler). Owner would not install same.

Should we ask if the IO-470 is supposed to have one? Heh.

I assumed that it wasn’t installed after the original post. Rarely see them on anything.
 
Lol, made ya click.

For those of you who have not seen the amount of water created by combustion and condensation, this is the worst I’ve seen. It was after 1.5 hrs flight, cowl flaps closed after climbing, didn’t open again until taxiing back. Starting air temp -2F, at 5000 ft was -19F, and about 5F after landing.

That’s an oily piece of cardboard that would absorb more oil and shed water. The yellow is an emulsion of oil and water. This is the drippage from the breather vent. Flight was 2 days ago.

No wonder corrosion happens more quickly with cold operation (ground running) and aging oil. This oil has 12 hrs on it.

View attachment 82812


My A-65 will do that even in warm weather.
 
Around here we usually don't fly piston engine planes below 0F, and avoid doing a lot of stalls or traffic patterns, things that cool the engine down, below +10F. Its amazing how fast the oil temp disappears after a few trips around the pattern in colder temps, even with winterization kits on.
 
Can't be water. Must be some other kind of a contaminant. The air is too cold to have enough moisture to allow for crankcase water.
 
My post was dripping with sarcasm and aimed at my second favorite A&P on the planet who I was paraphrasing.

The moisture content of your sarcasm was impacted by the temperature (no visible dripping). :D
 
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