Question about 2006 Volkswagen Jetta

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Losing coolant from the reservoir but cannot see any coolant leaking on drive. Fill reservior to MAX and within ~10miles, reservoir is drained. Refill while engine still hot and don't lose nearly as much coolant. Let sit for 3hrs, coolant down just a little, refill to MAX and drive ~10miles, reservoir drained again. This morning, filled reservoir to MAX, but left the reservoir cap off. Drove to dealer, about 45 miles, reservoir down a little, but not drained. Also, car NEVER overheated. Dealer says it's two bad/leaking heater hoses...... I don't see how it could be heater hose leaking and engine temp never goes up. If heater hose was leaking, how would it drain the reservoir starting with a cold system/engine? Do you think it is the heater hose?

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My '01 Jetta had a similar problem. I could always smell coolant and the bottle was always low. I crawled under the car and there it was..a caked on mess of pink antifreeze. There is a plastic intersection 3 way valve where the coolant temp sensor resides. it has 2 bolts and a rubber o-ring. Because it is plastic, it cracks. it drips down onto areas which are really not visible from above and then sizzles and melts onto areas under the engine. The part was only about $25, took 30 min to install and my problem is now fixed. Air was getting into the system through the small crack in the valve further complicating the system operation.

Posted on Dec 24, 2012

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It is highly probable then that it is in fact the heater hose leaking. Here is how.

If your radiator level remains full, then it won't draw coolant from the reservoir. The reservoir is also an over-flow bottle in the event the engine over heats and the coolant boils, the steam can be released into the reservoir...which is obviously not happening so we don't have to consider an engine gasket leak.

The only other places that you can lose coolant from then in your situation that would be rather obscure is the heater hoses. They are in the flow path of coolant after flow through of the engine. Thus why your engine is not over heating. If they (the hoses) are leaking then the coolant return amount to the radiator will get low enough to create a siphoning of coolant from the reservoir that you have to continue to keep filling.

Posted on Nov 09, 2010

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No I think you have a crack in the head or block of the engine, or a leaking gasket which is causing the coolant to be drawn into crankcase or combustion chamber. Pull your oil filler cap off and see if it has a foamy coating underneath or take a sniff at the exhaust and see if you detect the odor of ant-freeze.

Posted on Nov 09, 2010

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Posted on Jan 02, 2017

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Y dose the john dear 6330 run hot all the time even after it blowen out



Engine or hydraulic system overheating clearpix.gif clearpix.gif clearpix.gif clearpix.gif clearpix.gif clearpix.gif Coolant system low on coolant in 6020, 6030, 6030 Premium, 7020, 7030 and
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Symptoms
After several hours of work, warning system indicates hot engine coolant or hot hydraulic oil.
Situation or Problem
Coolant level in reservoir is between the "MIN" and "MAX" range but engine or hydraulic system is overheating.
Summary
Air is entering cooling system, hindering coolant flow. Check coolant level. Fill to the "MAX" line on the coolant reservoir.
Bleeding Cooling System:
The bleed valve (see Operator's Manual for location) on the radiator must be closed when the tractor is operating. Open the valve when coolant is drained or filled. If the bleed valve is left open, coolant will internally bypass between the low temperature circuit and engine high temperature circuit causing overheating. When bleeding the system, open the bleed valve and run the engine with no load for 5 minutes at 1700 rpm. Then shut engine off for 5 to 10 minutes before closing the drain valve. Check the coolant level. If level is below the "MAX" fill line, repeat this procedure until coolant level stays at the "MAX" line.

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My Dodge Stratus 2005 is leaking coolant. No trace to be found. I discovered last week that the whole coolant reservoir was empty. Yet the car's temperature was at normal level. There are no trace


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1 Answer

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