Pushing coolant out

[mulot30th]

I saw that happen really, on my own sled.

I could ride it no problem, but with tank down. I noticed it would push vapors through overflow instead of coolant when tank is low enough and that explain why this happen.


Here is a video of a dyno run of my (now sold) rx1m on boost this summer:

http://www.youtube.com/watch?v=OuORYOVZeZk



Okay this one is .... a bit longer than typical.. that was a test.

 

[mbarryracing]

Oh, I really don't doubt you. I know you know your stuff and that those vapors were combustion gases from the cylinders...
With that then you obviously had visual air bubbles streaming up thru the coolant in the main tank, too. A visual tell tale sign of any head gasket combustion leak and that is something we don't have in conjunction with this normal coolant expansion we are referring to... which explains the difference.

 

[mulot30th]

Oh, I really don't doubt you. I know you know your stuff and that the vapors were combustion gases from the cylinders...
But then you obviously had visual air bubbles streaming up thru the coolant in the tank, too. A visual tell tale sign of any head gasket combustion leak and that is something we don't have in conjunction with this normal coolant expansion we are referring to... That explains the difference.

okay.

To speak about coolant expansion, normally, about half an inch from bottom of tank cold and should never overflow unless badly overheat and I speak for rx1 style setup (no secundary catch tank)


If that don't work, then I know I have a problem.

 

[mbarryracing]

okay.

To speak about coolant expansion, normally, about half an inch from bottom of tank cold and should never overflow unless badly overheat and I speak for rx1 style setup (no secundary catch tank)

If that don't work, then I know I have a problem.

Yes, and to clarify on an Apex... that level is from the bottom of primary tank (the reservoir with cap) with the secondary overflow empty and not implying the level at the bottom of the secondary overflow tank with the primary tank at full when cold.
If the primary tank is already FULL when cold, then coolant expansion pushes into the secondary tank, potentially filling it and overflowing under circumstances...

Kinger,
Just confirm for us the levels of both tanks that you are starting with cold...

 

[mulot30th]

Normally there should not be any coolant or very little going on 2nd tank ever.

 

[TWIN TURBO]

Here is a true story for you guys.
I built a engine for a customer. He ran the sled and ran it and ran it. Beat the hell out of it. Came back to me and said it uses coolant. This went on for years. When it came time to freshen the engine up we pulled it apart, and I was looking for sighns of a head gasket leak. Couldn't really say for sure but it didn't blow the gasket thats for sure. We got the engine up and running again and he took it out. Came back and said it was still using coolant. I said NO WAY, you must have a leak somewhere. NO NO NO it's using a little coolant , he was convinced. I suggested a Apex second bottle and he installed one and guess what. The engine stopped using coolant, Imagine that.
I keep just a little coolant in the second boottle. Fill the system when the engine is cold. Keep just a small amount in the second bottle, maybe a inch. That way when you go through a couple of heat cycles if there is any air in the system it will draw the coolant out of the second bottle to replace the air purged from the system. If it draws alittle coolant out of the second bottle, replace what it uses. Thats the best way to go with this issue.

 

[kinger]

Sorry I will confirm the coolant levels

When I filled it last year I add the first tank full and then added about a inch to the second tank. When I filled it up again this year after 1800 miles the overflow tank was empty and the main tank had about a 1/4" in the bottom of it of coolant.

I added enough to top off the main tank, and get to the coolant cold line on the overflow tank. First ride its down to just a little bit under the cold line.

Think I have enough expansion going on drain basically both tanks over a year long season?

 

[mbarryracing]

You have too much coolant, re-read what Mulot and I have been posting... It's exactly what your sled had already been telling you, the happy level it wants to be at.