Question about 2000 Dodge Intrepid

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Overheating/fan doesn't come on/hose to nowhere???

Have overheating problems--not the first time--there is a small diameter hose located on the drivers side top part of engine in the area between expansion overflow reservoir and near stick to measure the transmission fluid. the hose seems to go no where that can be seen and I have searched top to bottom. I know that it is some sort of vacuum line as it does "****" air in so given that I would tend to believe that the line must connect somewhere in order to "close" the system and pull air through wherever it's supposed to flow which in turn trips a temp sensor which in turn enables the fan to come on as needed. Guys keep telling me to just cap it off --that it goes nowhere but I am no fool. Because I am a woman most men assume I don't know what I'm talking about and I am pretty sure I'm on the right track with this---I just don't know where the other end of this line attaches. There is little room to see let alone get your hand in and around and I cannot find any diagrams online that show this configuration. 2.7L V6 2001 Intrepid SE. I changed my expansion reservoir (yes, I did it myself) 2 weeks ago due to a pinhole leak and I'm thinking I must have caught that hose on something and helped pull off what was left of the "jerry-rigging" the last mechanic did to this area. He added another length of hose using a piece of larger hose as a "coupling" type piece not suitable for the heat it would be having to endure and of course it cracked and peeled as it should have done...the car has been a great one for me even with it's oil/antifreeze engine cocktail I recently had to have flushed out. At 180,000 miles and me driving like I'm 4-wheeling---my baby has held up very well. Please tell me where the other end of the hose needs to go so my fan will kick on cuz driving in Arizona without a/c (to avoid the overheating) is NOT GOOD. Thanks!!

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  • 496 Answers

Hi there lady mechanic...
Kudos for your go-getting spirit towards your car!
Hey, what I would suggest... get a motor manual specific to your car. They sometimes offer pretty good assistance for common problems... especially if you plan on keeping the car a while.
As for the hose... I'm not an expert ok? But most cars today have the cooling fans controlled electronically. They have their own electric motors, unlike the old belt driven autos of yesteryear.
Vacuum lines sometimes go to the master cylinder brake booster. The booster looks like the picture in this link:

http://www.car-stuff.com/includes/secure/popup.php?type=more&image=aHR0cDovL3d3dy5jYXItc3R1ZmYuY29tL3N0b3JlL2ltYWdlcy9wcm9kaW1hZ2UvaW1hZ2VzL2ExX2NhcmRvbmUvNTQtNzMxNzYuanBn&title=QTEgQ2FyZG9uZSBCcmFrZSBCb29zdGVy&text=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

See if your line disappears close to this animal, mounted on your firewall. If so, that's probably where it goes.
As for your fan, check your owners manual to find your fuse box locations and check for a fuse issue. Else, there is a relay that tells the fan to come on at certain times. The relay could be faulty. If all the electric power is there, possibly the fan itself is the problem.
Lots of stuff to check, but you can do it.
I hope I helped you if not a little...
Best of luck!

P.S. Hey, I "Jerry rig" too (It's my name)

Posted on Aug 28, 2009

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The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.
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The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.

Also note that the cooling fans don't come on until the coolant temperature hits around 225 degrees.
During normal highway driving the fans will very rarely come on(if at all) due to constant air flow through the radiator.They will only usually come on in heavy traffic conditions on a hot day.
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The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.

Also note that the cooling fans don't come on until the coolant temperature hits around 225 degrees.
During normal highway driving the fans will very rarely come on(if at all) due to constant air flow through the radiator.They will only usually come on in heavy traffic conditions on a hot day.
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There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.

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The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.

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The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.

Also note that the cooling fans don't come on until the coolant temperature hits around 225 degrees.
During normal highway driving the fans will very rarely come on(if at all) due to constant air flow through the radiator.They will only usually come on in heavy traffic conditions on a hot day.
But......if you have the Air Con switched on, the fans will run all of the time.


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