OK Team what could possibly be causing this, as I've posted in the past.

1. I'm losing coolant at what seems to be a sudden loss that is every now and then. I originally thought I was losing about 1-2 gallons every 400-500 miles, but after closly monitoring and not seeing too much of a loss untill all of a sudden it's gone. Leads me to believe that I lose alittle and then bamm, A bunch.

2. I pressure tested, all ok.

3. No coolant in oil and no Oil in Coolant.

4. All hoses checked and double checked.

5. Drained and flushed Heater Core, all good.

6. One visible sign of water damage in engine compartment, is Rust, redish-orange rust on the steel injector lines and some surface rust on the valve covers.

7. Overflow Res looks fine.

8. No visible leakage, compression test looks good and averages the same across all 8

9. Got a new T-Stat (International) and New Rad Cap (13PSI)

10. I'm going broke buying coolant and additive and cannot manage the addditve mixture with a loss rate like this.


TOP Question: Could the Cab Heater have something to do with the flow/pressure of the coolant and where other than the Htr Core would I see a prob.

Second Question: My dry Bottle for the AC frosts over pretty good every now and then, so much frost forms up the suction line, could this have an immpact on Coolant flow? Is there a tie between AC and Coolant Flow?

 

Most likely losing it throught the heads when they get good and hot. If it's every run hot with alum heads most likly they are warped or cracked . The Malibu is bad about just blowing it throught the head gaskets. Check your oil and tail pipe for any coolant.

 

Also there is a dye check that will pick up traces of combustion gases in the anti freeze. I don`t know if you can buy it otc,but any radiator shop should have it . I agree with Hap. Mush

 

I thought about that, but wouldn't I see signs at the heads

 

1SG,

Have you thought about sending an oil sample to blackstone labs and having them analyze it. Cost is $25.00, and they may discover your lost antifreeze.

Just my $.02

 

To answer your question, the answer is no ,you wouldn`t see it if it is an internal crack going into the cylinder.Just as you would have coolant going into the cylinder,you would also have combustion gases going into the coolant. Hope this helps. Mush

 

Sounds like a head gasket problem. Your coolant is probobly going out your exhaust. When the truck is warmed up, smell the exhaust for a coolant odor or excessive water coming out of the tailpipe. (some water is normal because of condensation for the first couple of minutes only)