Question about 2003 Volkswagen Passat

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Coolant leak My coolant leak is coming from the rear section of the engine. A mechanic told me that it was caused by the Heating Valve. Are these hard and expensice to replace?

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Posted on Jan 02, 2017

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SOURCE: Coolant leak

WOW! that's pretty darn hefty no matter who ya are. Are you loosing very much oil? If not at least get the heater hose replaced(but not from these guys) And while its at a independent shop, have them look at that turbo oil leak-yes should be repaired, turbos don't like to run without oil, but could be just a loose line. Check with friends, family, and neighbors to see who they recommend to work on your car. I don't know were you live, but I would bet that there is a foreign car specialist around.

Posted on Sep 12, 2009

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alicantecoli
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SOURCE: Coolant leak near rear of engine.

What is a heating valve please ,never heard of this terminology ,a heater take off yes but a valve ?well if does have one i have never seen one ,most common cause is a core plug or in american freeze plug but a heating valve ?? couid be a heater hose perished and split i agree but a heating valve the heat on these cars is shut off by closing a flap on the heater inside the heater unit so this repair if its just a heater hose shouldnt take long unless its a core plug in which it may involve a longer job

Posted on Nov 27, 2013

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2 Answers

My heating stopped working in my 1992 Cadillac Eldorado what is the problem


Try checking the heater control switch/valve, sometimes located in line with the heater hoses (it is a fairly common defect). You may also have a clogged or bad heater coil. (similar to a small radiator) or maybe a fault in the heat system's controls.

Nov 08, 2014 | 1992 Cadillac Eldorado

1 Answer

Coolant leak near rear of engine.


What is a heating valve please ,never heard of this terminology ,a heater take off yes but a valve ?well if does have one i have never seen one ,most common cause is a core plug or in american freeze plug but a heating valve ?? couid be a heater hose perished and split i agree but a heating valve the heat on these cars is shut off by closing a flap on the heater inside the heater unit so this repair if its just a heater hose shouldnt take long unless its a core plug in which it may involve a longer job

Nov 27, 2013 | 2003 Volkswagen Passat

1 Answer

Audi a6 quattro 2001 coolant disappears, engine overheats and white smoke comes out


Unfortunate you're losing coolant into the cylinders, where it's being burned off and exiting out the exhaust. When you initially added that cold coolant into the hot radiator, and hot engine (sit down) you likely cracked the engine block. Best case you just need to replace the head gasket.

Jan 07, 2013 | 2001 Audi A6

2 Answers

Coolant is leaking ,i have to fill it everyday.hardly any heat. what can i do? it seems like its shooting the coolant out somewhere on the right side of the motor.


It's probably the waterpump, it's right where you describe. They are pretty cheap and easy to do so even if you have a shop do it, it should not cost that much. Have it repaired before the engine is damaged from over-heating.

Feb 24, 2011 | 2000 Pontiac Montana

1 Answer

Over heating new radiator cap water pump and thermostat still nothing works someone told me ecp valve but i dont know where that is either


You did not list what year or engine BUT: Overheating can be the product of either poor coolant flow through the radiator (either restricted air flow from leaves bugs etc. or internally blocked coolant passages.) Or, and air-lock in the system from not properly re-filling after service (generally overcome by filling as the engine warms up with the heater turned on high heat).
If the engine overheated substantially before the repair was made, you may now have a blown cylinder head gasket, or, a cracked cylinder head. Evidence of this usually is exhaust in the cooling system (testable with proper equipment), Water or steam coming out of the tail pipe when running that continues after warm-up, or, coolant in the engine oil. (when in doubt drain, and watch for coolant, which will come out first as oil will float on it.)
Water pumps generally still work even when the seals or bearings are gone, providing the system is full. Cap will usually cause a delayed overheat as coolant escapes under pressure over a period of days. (all other leaks can do that as well)
Replacing the thermostat is always a good thing to do providing you put it in correctly (properly positioned in bore and spring end towards the inside of the engine)
Additionally, your cooling fans must be working. Electric fan should come on, especially when the engine is overheating. Mechanical fan should lock up and not freewheel again, especially when in overheat.
Aside from system testing, you always need to maintain a 50/50 mix of water/antifreeze. That raises the boil temperature of the system above the 212(f) of plain water....Too much coolant will lower it though.
Any questions about anything you find and don't understand? ASK.

Oct 11, 2010 | Jeep Cherokee Cars & Trucks

2 Answers

Coolant Leak


rear cylinder block core plug its behind the bell housing.It has been caused by running the engine with no antifreeze which also acts as an anti corrosion inhibitor .

Nov 20, 2009 | Jaguar S-Type Cars & Trucks

1 Answer

Using alot of oil and antifreeze. no puddles,not coming from tail pipe where is it all?


Burning oil is a burned or stuck valve or bad rings. Loss of Anti freeze is over heating or a bad head gasket or major problem with the engine. The fluids have to be going somewhere. I have had conditions where the leak only occurred when the engine was running and was very hard to find. Rear Main seal issue. You need to have the motor checked out by a mechanic.

Nov 17, 2009 | 1992 Ford Explorer

1 Answer

1997 Toyota Avalon over-heating problem due to low coolant level


Could be buring coolant from headgasket leak. thats the only other way coolant can leave your engine besides a leak.

Side note:
I strongly reccomend in the future not to use ne kind of coolant stop-leak stuff. you have small passages coolant needs to go through and that stuff also cloggs up those areas. alot of people dont think that far ahead. so alittle info for the future for you. it also cloggs up your heatercore and radiator. and will cause faster corrosion in those areas.

Apr 28, 2009 | 1997 Toyota Avalon

3 Answers

2003 kia sedona over heating and no heat


Check your rear coolant lines, These lines always rust and start leaking coolant and thats why your engine over heats and you dont get any heat inside your car. This is a common problem with kia sedona that have rear A/C and Heater. There are two fixes to this problem. The first is to replace the rear heater coolant lines with the updated lines from kia. The second will be bypassing the rear coolant lines with a hose, however the rear heater will not work with this method.

removing the rear coolant lines is not that easy. The lines near the fire wall are really hard to remove. Its also much easier to replace the lines with the car on a hoist.
hope that helpfull

Kia mechanic

Dec 29, 2008 | 2003 Kia Sedona

1 Answer

Heating in my car


There is a valve that controls the hot water into the vehicle heat exchanger which is on the cab side of the firewall. The device is controlled mechanically with a push-pull cable , by vacuum control or electro-mechanically by a servo actuator.
There are most likely TWO pipes that come from the engine radiator and go through the firewall, rear wall of the engine compartment, into the passenger cab area. The Heat exchanger control valve is
mounted somewhere along the path of ONE of those pipes or tubes (the "input" tube).
There are many threads on the Internet on this vehicle and year, and so many concern heating/cooling.
I would suggest getting or borrowing a $20-25 manual on the car and going to the body section and
tracing either the vacuum diagram or the heating control section to find the valve and also the dash controls. Something is disconnected or broken with either one of the three methods described.

This assumes all else is OK and NO COOLANT leaked into the Oil (frothy Oil on dipstick)
and no Transmission Fluid is in the Coolant (oily color reddish in the Coolant with oil smell instead of sugary sweet smell) ; if the coolant system integrity is compromised in any way as described; stop -> go to a mechanic <-; increasing damage is imminent.

If its just a control issue, you can probably set the valve up at 1/2 open if its a mechanical type with push-pull cable; I have done this on several cars when the control cable rusts; disconnect the valve end and set it manually 1/2 or 3/4 for the winter

Johnny

Oct 23, 2008 | 1994 Dodge Shadow

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