blowing coolant out resevoir - Dodge Cummins Diesel Forum
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post #1 of 23 (permalink) Old 05-05-2011, 02:11 AM Thread Starter
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blowing coolant out resevoir

noticed dried coolant on the hose under the overflow spout and some on the cowling, the level was past the full mark about 2'' would that cause it to overflow? i did a little searching could this be a sign of a blown head gasket or what? the truck is bone stock with 38,000 miles...?


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post #2 of 23 (permalink) Old 05-05-2011, 10:33 AM
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Sounds like it, man on a stock truck too!

If it bubbles out the overflow when the truck is running and has had a full heat cycle that is a good indication of a head gasket issue. Also watch you temp gage if it goes up over normal, and you have no heat coming out of your vents that can indicate an air pocket ie blown head gasket as well. Other things to look for would be oil in antifreeze or antifreeze in oil. Anyone of these issue can be a blown head gasket.

I really hope this is not the case. Keep us updated, and I hope it is nothing.

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post #3 of 23 (permalink) Old 05-05-2011, 11:26 AM
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My overflow hose (from rad cap to overflow bottle) was leaking, a small hose clamp fixed that. Evan is correct though, look for bubbling in the coolant. You could even take off the rad cap to see the surface of the coolant and if there's bubbling or not or an oil sheen. Hard starts and/or white exhaust is a nother indicator (along with what Evan was saying about one fluid in another). Pull your dipstick and look for milky oil and look for oil in the radiator.

To help avoid a blown head gasket, it is highly adviseable to take it easy on your truck until the engine coolant temperature has come up over 160*F. Gentle throttle application and keeping the RPM low while driving a cold engine vehicle. Nice thing about yours is you still have power train warranty If you have power mods in your future, think about getting some ARP studs installed when they do the head gasket to help avoid another head gasket failure (I would consider this even on a stock power truck). ARP 425 studs if you're power goals are conservative, ARP 625 studs if you're gonna push some serious power.


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post #4 of 23 (permalink) Old 05-05-2011, 11:39 AM
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2" above the full mark means a Hot Engine. Until your over flow bottle fill ups and actually sprays coolant out and it is dripping on the ground then I would say you have a blown a gasket. But with just 2" above the mark I dont believe it just yet.

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post #5 of 23 (permalink) Old 05-05-2011, 08:10 PM
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Quote:
Originally Posted by Sandman76 View Post
My overflow hose (from rad cap to overflow bottle) was leaking, a small hose clamp fixed that. Evan is correct though, look for bubbling in the coolant. You could even take off the rad cap to see the surface of the coolant and if there's bubbling or not or an oil sheen. Hard starts and/or white exhaust is a nother indicator (along with what Evan was saying about one fluid in another). Pull your dipstick and look for milky oil and look for oil in the radiator.

To help avoid a blown head gasket, it is highly adviseable to take it easy on your truck until the engine coolant temperature has come up over 160*F. Gentle throttle application and keeping the RPM low while driving a cold engine vehicle. Nice thing about yours is you still have power train warranty If you have power mods in your future, think about getting some ARP studs installed when they do the head gasket to help avoid another head gasket failure (I would consider this even on a stock power truck). ARP 425 studs if you're power goals are conservative, ARP 625 studs if you're gonna push some serious power.
Not to hijack, but what would the oil sheen on the coolant look like, goldish tint? coolant is still pink, but if I shine a flash light in the rad, sort of has a godlish tint, but can still see through the coolant and see the fins in the rad.

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post #6 of 23 (permalink) Old 05-05-2011, 08:19 PM
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That goldish tint can be cause by the copper in the radiator too. Not that its coming off but the way the light hits it can be fooling.

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post #7 of 23 (permalink) Old 05-05-2011, 08:25 PM
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That goldish tint can be cause by the copper in the radiator too. Not that its coming off but the way the light hits it can be fooling.
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post #8 of 23 (permalink) Old 05-05-2011, 10:58 PM
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what if the coolant only runs into overflow tank when driven hard? i think my head gasket may be going out, but after driving it for a day nice and easy the level never moved in the over flow tank... have a head gasket coming in tomorrow.. any thoughts on this? any advice would be helpful, thanks.

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post #9 of 23 (permalink) Old 05-05-2011, 11:48 PM Thread Starter
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Quote:
Originally Posted by mattpopp View Post
2" above the full mark means a Hot Engine. Until your over flow bottle fill ups and actually sprays coolant out and it is dripping on the ground then I would say you have a blown a gasket. But with just 2" above the mark I dont believe it just yet.
so why would any come out at all? i warmed the truck up today and went and drove it, mashed it a few times but no coolant spill, no drops, nothing...

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post #10 of 23 (permalink) Old 05-05-2011, 11:56 PM
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so why would any come out at all? i warmed the truck up today and went and drove it, mashed it a few times but no coolant spill, no drops, nothing...
did a little more digging on the forum, found that it is possible that when the coolant runs into overflow tank as it warms up, a lose hose that runs to the tank will cause a vacum leak causing it to not pull coolant back into radiator. going to try putting hose clamps on tomorrow and see if it fixes the problem

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post #11 of 23 (permalink) Old 05-06-2011, 11:28 AM
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I ended up installing a clamp where the overflow bottle hose connects to the radiator because evidently Chrysler forgot to add that one when the truck was being built!

I kept seeing coolant in the bottom of the air intake box and was wondering exactly where it was coming from. I was at one time also wondering if it was indeed the head gasket. I have since deleted all the emissions crap and installed a $.99 clamp, that eventually solved the shortcomings of DC... AKA Fiat (or whoever is currently footing the bill at the moment!) Since then, the leaking and leftover dried crusty coolant issue went away for me at least

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post #12 of 23 (permalink) Old 05-06-2011, 11:39 AM
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As the coolant expands, it will push some water out, but when it cools down, it will suck it back in.

I need to look into the hose clamp on the overflow, mines pretty loose, and coolant marks are here and there. Dealer just gave it a clean bill of health with the head gasket, so maybe its the over flow bottle.
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