Question about 1998 Volkswagen Jetta

2 Answers

Over heating when i fill the cooling system to the right level and run my car the water in the overflow starts to boil and come out of the overflow. the cars fan works so it does not register hot on the gauge. but after running for 5 or so miles it starts the boiling thing. i flushed the system by taking the hose that runs to the engine from the overflow off and hooking a hose up to a flush kit and running water through the system, when i did this the water seeme to have ran through everything and exited through the engine(where i took the hose off).

Posted by on

  • nysf12 Jun 30, 2009

    i did change the thermostat and now i am worried the i have head problems

  • nysf12 Jun 30, 2009

    i have changed the thermostat, what else can i do?

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,056 Answers

Have you changed the thermostat? The way you describe it seem like a thermostat.

Posted on Jun 30, 2009

  • Ronado Panaligan
    Ronado Panaligan Jun 30, 2009

    Unless your oil looks milky, you dont have a head problem. That is a clogged up radiator, and don't let it overheat anymore or you may really end up with a head problem or even a broken motor. Change or service your radiator. You can't clean that up by flushing believe me. You can rebuild the radiator yourself if you want, i can show you how, i will be waiting for your comment on that.

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have the exact problem with my jetta, also check to see if there is pressure on your radatior hose that leads to your engine if there is no pressure then your motor isnt getting suffecient water, also try using 50/50 anti freeze instead of water

Posted on Jul 02, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2006 Chevy trail blazer. Keeps getting hot. Anti-freeze is full, overflow container is half full. Every time I turn it off can hear fluid in radiator boiling and bubbling?


Pam are you sure it's boiling? If the Antifreeze is boiling I'd think you'd see steam coming out of your reservoir as the water expands into the reservoir, but you didn't say you see anything like that.
Of course engines get hot, that's why we have the cooling systems but it doesn't sound like it's "boiling" to me with no signs of visible steam unless your antifreeze level is really low?

If it's really boiling, and you antifreeze level is good, then your reservoir should be getting filled up with expanded hot water that goes into it to catch it when it expands.

If the water isn't going into the reservoir, then maybe your antifreeze level in the radiator is too low and you need to add antifreeze?
.
Best to fill the radiator with the engine cooled down. If you ever have to open the radiator when it's hot, NEVER open it with your bare hand as you could get scolded with boiling water. Instead use a big thick towel to remove the radiator cap off a hot engine. Again, if you can, just wait until the engine cools then open the radiator cap.

With the engine cool, you can fill the radiator with a 50/50 antifreeze mix. The 50/50 mix come premixed 50 percent water, and 50 percent antifreeze. So you can throw that stuff straight into the radiator.

Non mixed antifreeze needs to be mixed 50/50. Some people use 50 percent distilled water when they mix it because distilled water doesn't have the minerals in it that may get stuck in your radiator. That's being a bit picky about it though. Tap water works fine in a pinch. The other 50 percent is antifreeze. You can mix it right in the radiator too, put in a measured amount of the antifreeze, followed by the same measured amount of water. The water pump will mix it all together when you run the engine.

Put the cap back on and run the engine and if/when the water "boils" it should go into your reservoir. If it does boil in go in the reservoir then yes...your engine is getting hot and the antifreeze is boiling.

When the antifreeze boils, it's probably because your thermostat is stuck closed. That means the thermostat isn't letting water circulate through the radiator to get cooled. Thermostats are cheap...no more than $30 I'd say for most cars. Changing them is pretty easy too as they are usually right at the top of the engine. A mechanic may charge $100 to change it....but it's an easy job on most vehicles requiring just a couple sockets/socket wrench.

Oct 03, 2016 | Cars & Trucks

Tip

How to keep your car below boiling poimt. ALL CARS!!!


most times in the heat your cars cooling system can over load, to stop overheating, always check your vehicles radiator water never the overflow resevoir.

always make sure your top radiator hose is hot, when running and your thermo fans come on automatically when on average heat temp. (half way).

make sure you cannot hear any noises ( clunking, grinding etc) from the waterpump, and always make sure you dont see water leaking from the vehicle ( except when air con is on).

if you do spring a leak always get it repaired ASAP as delay may further damge your cooling system, eg, head gasket and or head, effects may be warped, bent or cracked cylinder head.

always check your radiator and top up if needed at least ONCE A WEEK to avoid damage. and keep your overflow resevoir kept on the correct level.

cooling system failure can produce a big effect on your engines running capability and also your wallet!!!!!

keep your car cool in the heat!!

and also note, coolant or anti freeze does not keep your car cool, it is a corrosion inhibitor and only prevents corrosion and muck in and around your cooling system, your thermo fans keep your car cool!!!!

on Dec 04, 2009 | Acura CL Cars & Trucks

1 Answer

The overflow need to be filled with water?


Yes, it is important to include the overflow tank or bottle as integral with the radiator and coolant system as a whole. They all intermix. Actually, the level in the overflow tank is a true measure of the correct amount to keep your coolant at. There are two marks on the overflow: full hot and full cold. The coolant system on all modern cars is a sealed system and therefore should never require adding, save a very small amount through evaporation within the overflow tank- the only part that is open to atmosphere.

So once you get all the air out of the system that is possible, both in the engine and in the radiator, you have a full level everywhere, including the overflow tank where it should always remain somewhere between the full hot and full cold marks.

You are right that the overflow collects the heated radiator coolant. But it is due to the expansive properties of coolant-or water- that it expands when heated, (but not boiling-that is very bad news of a different sort). Your radiator cap is designed to open at a specific pressure, just enough to allow coolant to flow into the overflow. As the engine and coolant cools, it contracts, the level drops in the radiator, and a natural vacuum there will siphon the overflow tank back into the radiator until it is full again. That is why you have the full hot and full cold marks.
I will shut off the lecture now. I hope you have liked my answer. If not, I give you permission to kill me now- if I may so jest.

Mar 06, 2015 | 1992 Toyota Corolla

3 Answers

Engine overheating i have replaced the radiator has plenty of water


replace thermostat.then bleed coolant system, this is how you do it.fill the cooling coolant system with 50 / 50 dexcool and water to raise boiling point,straight water will evaporate boil away cause engine to overheat catch fire thats why you need 50 / 50 mixture antifreeze and water.to bleed coolant system first fill coolant system until coolant stay at the full cold mark on the the coolant overflow jug,then you start engine allow it to idle,place the heater and ac control in any ac setting except max and the temperature control to the highest setting,run engine until lower hose to water pump is hot. with the engine hot run the engine speed up to 3000 rpm and allow it return to idle, repeat this 5 times. slowly open the bleed valve on the thermostat housing or look for bleed valve at the water pump heater hose.open bleed valve for 15 seconds to expel any trapped air.then top off the coolant as necessary,and when top radiator hose hot thermostat open up.keep adding cooling to overflow until coolant level stop at full cold mark dont over fill coolant.if engine seem like overheating while looking at cooling gauge turn off engine wait a while until cool off add more coolant until coolant level stay stable and dont drop any.when open radiator overflow cap use large rag over the radiator cap to keep from getting scald open radiator cap a little at a time but dont open radiator cap until engine cool down first.replace the radiator overflow cap, thermostat,and engine coolant temperature sensor and check the cooling fans fuses and relays see what happens.

Aug 18, 2012 | 1998 Oldsmobile Intrigue

2 Answers

Drained radiator added prestone Radiator flush refilled and started overheating, drained radiator replaced thermostat and now I get no heat from heater,Radiator water is hot


disconnect the heat hoses going into fire wall , put hose into one with pressure and flush as it sounds like it could be bloked in the heater core,the other thing that could be the problem be the hot ,cold switch as it restricts the flow to makes the heater hoter or colder , it might need tlc or replacing as it is manaul not elec

May 08, 2012 | 1995 Toyota 4Runner

2 Answers

06 impala bleed air out of cooling system


Put heater on high heat to circulate water in those hoses and heater core. Then start the car after removing the radiator cap and filling with coolant to the top. When the radiator opens you will see the liquid level go down- add more coolant and keep adding till it stays full. Meanwhile fill the overflow to recommended level. When radiator level goes down no more, put radiator cap back on and let engine and coolant cool. If any more water is needed the vacuum created by the shrinking water will draw it in from the overflow.

Jan 11, 2012 | 2006 Chevrolet Impala

1 Answer

Car keeps boiling tru resivour at side. all coolant boiled outta it found out it was a broken radiator cap. got new cap what coolant do i put back in and how much


Get the green stuff and mix it 50/50 with clean water. With the vehicle cool fill up the radiator until it is full and then fill the overflow tank up to the cold fill level. Start the car and take it for a spin making sure to get it up to operating temp, let it cool and then see where your level is on the overflo tank. Fill up to the hot mark and then repeat a couple times and you should be good.

Aug 01, 2011 | 1993 Toyota Camry V6

1 Answer

Hi, My car is boiling water and it goes our from the overflow pipe at the coolant level water tank. I let my car run for one hour standing on my driveway and the temperature was going to 222 and then the...


When sitting still, yes both fans on a car equipped with two fans will run. The temperature ranges you posted seem within acceptable range. That said, the water (coolant) should not boil at those high temperatures, but some overflow is expected/normal. Ensure that you are not adding pure water to the radiator and instead are premixing it with antifreeze coolant or adding premixed 50/50 that you can buy at auto stores as this will keep the water from boiling and freezing.

As an added point of information, the hose leading into the overflow jug is two-way, meaning that when the coolant in the radiator cools down enough, it creates a vacuum and pulls coolant back into the radiator.

Zach

Feb 28, 2011 | 1999 Cadillac DeVille

4 Answers

2004 Chevy Impala no heat from defrost or heater


No heat is often a symptom of low coolant, usually followed by overheat. There are other controls that regulate heater, but right now, re-fill the cooling system with engine running and heater on high, then check for leaks (coolant you lost went somewhere...you need to determine where) Low coolant will damage your engine. Take care of that first, then if heater still does not work, then do diagnosis on that. (if you loose the engine heat won't matter, will it!)

Sep 22, 2009 | 2004 Chevrolet Impala

2 Answers

Water was boiling and spraying from overflow / reservoir tank from what appears to be a factory made hole. was there a plug in there that might have rotted off and caused this?


well that mean that oone your thermostat is not opening or your water pump or possible that a hose might be collapsing to cause the water not to flow

May 25, 2009 | 2000 Chrysler LHS

Not finding what you are looking for?
1998 Volkswagen Jetta Logo

Related Topics:

216 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volkswagen Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

yadayada
yadayada

Level 3 Expert

75797 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8140 Answers

Are you a Volkswagen Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...