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Jeeper64060 · 10-14-2016, 10:07 AM

I did not have a question, I was providing my experience. After reading the replies though I have temporarily installed a jug on the overflow so I can check to see if anything is coming out. I've been on 2 short drives and no sign of anything going out. I've never seen it get hot or push anything out yet.

LVRVLUVR · 10-15-2016, 02:44 PM

Quote:

Originally Posted by Jeeper64060

I did not have a question, I was providing my experience. After reading the replies though I have temporarily installed a jug on the overflow so I can check to see if anything is coming out. I've been on 2 short drives and no sign of anything going out. I've never seen it get hot or push anything out yet.

you better hope it pushes it out on a long grade.... other wise look at a high presure radiator leak,.. blown head gasket... cracked block, weeping radiator hose... leaking heater hoses.... that " 4 gallons of anti freeze went somewhere and it doesn't just get used up.... I'd go pull a long grade and see if it goes in the tank.....some one probley had a radiator leak .... put the low pressure cap to stop the pressure from getting high enough to blow the stop leak out.... you def. have a problem that should be addressed...

wolfe10 · 10-15-2016, 03:21 PM

Quote:

Originally Posted by Jeeper64060

After reading the replies though I have temporarily installed a jug on the overflow so I can check to see if anything is coming out. I've been on 2 short drives and no sign of anything going out. I've never seen it get hot or push anything out yet.

Not sure it is that dire. Absolutely if the radiator/cooling system are full when cold, it WILL overflow into an overflow jug as the coolant heads up. And will return as it cools down. Straight physics.

So, first guess is that you still have AIR in the system which is absorbing the expansion.

Could it be something more serious-- yes. But start by "re-topping off" the cooling system when COLD.

Let us know after you do that a couple of times.

Old Scout · 10-15-2016, 03:49 PM

OK--back to the issue of adding additional overflow tanks [expansion tanks]. IMHO--the only expansion tank you will ever need is the one that came with the coach. Key to successfully checking coolant level is to check it via the sight glass when the engine is at operating temp, repeat, at operating temp--not when cold. At operating temp, the coolant should be no higher than the sight glass level--this still gives you approx. half the tank for expansion in high temp situations like long, steep grades. If you suspect the sight glass is defective, you can use a small hose to verify that the coolant is about at the sight glass height.
As for having "lost" 4 gallons of coolant, I haven't lost that much in 13 years and 162,000 miles. If the "leak" is internal to the engine--you may have a big problem. If the "leak" is external to the engine, you have a big leak.

LVRVLUVR · 10-15-2016, 04:31 PM

Quote:

Originally Posted by Old Scout

OK--back to the issue of adding additional overflow tanks [expansion tanks]. IMHO--the only expansion tank you will ever need is the one that came with the coach. Key to successfully checking coolant level is to check it via the sight glass when the engine is at operating temp, repeat, at operating temp--not when cold. At operating temp, the coolant should be no higher than the sight glass level--this still gives you approx. half the tank for expansion in high temp situations like long, steep grades. If you suspect the sight glass is defective, you can use a small hose to verify that the coolant is about at the sight glass height.
As for having "lost" 4 gallons of coolant, I haven't lost that much in 13 years and 162,000 miles. If the "leak" is internal to the engine--you may have a big problem. If the "leak" is external to the engine, you have a big leak.

X2....what I've seen in my years as a mechanic....signs of where it's going...white smoke....residue on engine or fire walls...

Jeeper64060 · 10-15-2016, 09:18 PM

Just drove it a little over 1000 miles. No white smoke and no leaks in the engine compartment, no drips on the ground. It's dark now but I can see a little in the jug I put on the overflow, maybe 1/2 cup. I'm reasonably sure the cap I took off was the original. The gasket was in poor shape so it's possible it was not holding anything.

Mule Skinner · 10-15-2016, 09:41 PM

I don't think you have a problem. I do think your coolant system is breathing through the cap. Wet air out under pressure and dry air in. It will take many cycles to am out to a measurable amount.
I said this before, my coach came with an 8 lb. cap . That ain't right. I changed to a 16 lb and no more.coolant loss. If you feel better with the 10 lb. fine, just keep a close watch on the level.
I think WRV didn't have that tight of quality control to stop a shipment over a cap. Probably had no idea.