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Coolant pipe rusted and leaking - 2002 Mitsubishi Eclipse

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Not enough glycol in the cooling system

Posted on Jun 30, 2009


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Stop leaking?

There should be rubber hoses at either end of the metal pipe to allow for engine ,movement. It would be black steel pipe and it rusts out from lack of coolant conditioner.. A final fix for this would be to take it to a muffler/ exhaust shop and have a new pipe bent to shape made out of exhaust stainless steel tubing

Mar 14, 2014 | 2000 Ford Windstar

1 Answer

Thermostat gasket blown

Is it all one piece, the outlet pipe and the t-stat housing? The gasket goes on the bottom of the housing where it mates to the engine. If the coolant is leaking from the bottom of the housing, that would require a new gasket. If coolant is leaking where the radiator hose connects to the pipe, have you tried tightening the hose clamp?
If the outlet pipe and housing are separate, there may be an O-ring seal between them. You may want to pull off the radiator hose and check if the pipe is so badly corroded and rusted that it cannot seal anymore, or may have a hole in it, especially if it is thin metal.

Jan 09, 2013 | Mitsubishi Mirage Cars & Trucks

1 Answer

Mitsubishi montero 2003 leaking anifreeze in the rear

There is a set of two steel pipes that carry coolant/antifreeze to the rear mounted heater core for heater operation. These steel pipes/tubes rust out, and you end up with a coolant leak. Mitsubishi has superceded the steel tubes with aluminum tube set. Not an easy job to replace the two pipes since they are routed over and around a few items under the vehicle before attaching to the heater core at the r/r of the vehicle.

May 04, 2012 | Mitsubishi Cars & Trucks

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2006 Saturn Vue 4 Cylinder on the passenger side Coolant leak behind the tire rear lower area on braes bar. It leaked good when I was at the store but the coolant bottle was about one inch under the...

There could be many reasons why the coolant leaks, you may have a bad waterpump or maybe its a hose leaking but its hard to say without looking at it. the correct way would be to pressurize the cooling system to locate the leak or if it runs out with pressure then you would need to try and see where the flow is coming from. it sounds like maybe a pipe rusted and is now leaking or again maybe just a hose.good day.

Sep 17, 2011 | 2006 Saturn Vue

1 Answer

Good day we have a 7 seater mazda mpv w reg the car is losing coolant but no water is getting in the engine because the engine oil is not milky, but water is coming out of the air conditiong system at the...

Check heater pipes under the vehicle, as these have heater controls in the back of the car the pipes rust out causing coolant to leak out. cut the pipes and bridge them together as you dont require a heater in the rear of the vehicle. Costly if you cook the engine if its a V6, as you have to pull the engine out to do head gasket replacement.

Apr 11, 2011 | 2000 Mazda MPV

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A line is leaking coolant under the car(the line is metal) what is the kine called. thanks

Those are probably your rear coolant lines. Try to follow them to see if they end at the rear of the van. Also check your water pump it could be that leaking and it just appears it's coming from a pipe. I have a 2002 with 113.000 miles and my lines just rusted and exploded this past winter. Once they do rust through the van will immediately overheat. I am not sure if this is DIY job unless you have the tools to bend pipe. It cost me $400 to get all of rear coolant lines repaired.

Jun 09, 2010 | 2002 Kia Sedona

1 Answer

Antifreeze leaking near oil filter there are 2 pipes coming from there that are metal. one has rusted now leaking.What are these pipes for.

That is probably the oil cooler, coolant goes through part of it and oil goes through another part of it. It helps cool the engine oil. You could bypass it until you get another.

Jan 10, 2010 | 2002 Chrysler Town & Country

1 Answer

The leak is coming from under the passenger side door and the pipes caring the coolant to the rear heater is rusted. Can this be replaced easily or closed off so that there is only heat in the front?

On my 1994 Grand Caravan:
I cut (sawed) the rusted pipes at the point of where the rust stopped (plus 1-inch. Take that cut portion of the pipe to any auto parts store and get BULK Rubber Heater Hose. Remember to add on a few inches (2) for each end to fit onto the pipe (on the Van) at each end. Use the pipe you brought to get the correct size (diameter), fitting the pipe snuggly into the rubber hose. Buy 2-adjustable band clamps for the hose, one for each end. Make sure you get the correct size diameter clamps.
Hint: When putting the rubber hose you bought onto the metal pipes on the Van : to slide the hose onto the pipe easier use grease on the outside of the metal pipe and on the inside of the rubber hose you bought (about 2-inches).
Clamp them down at least 1-inch from the end of the cut.
Replacing the metal pipes is more expensive and more labor. I did mine for about $5.00 and was done in 15-minutes, The Rubber Hoses will not rust on you.
Let me know if that helped or if you have addtional problems or questions, feel free to contact me at

Nov 30, 2009 | 1996 Plymouth Grand Voyager

1 Answer

My car was running great. i ran over something off road that made the exaust leak near the motor. i continued to drive it . then it began to run low in water and if i didnt keep a close eye on it, it would...

Exhaust and coolant problems are two separate things. It's possible the donut that connects your exhaust manifold to the pipe came loose or the exhaust manifold or pipe has a hole from rust. You obviously still have a coolant leak somewhere. Start the engine and look under the car to see if you can see coolant dripping. It's either coming from one of your hoses, thermostat, water pump or coolant lines that run from your radiator to your transmission (if you have an automatic). There's a good chances are if it's still leaking the new water pump may not have been installed correctly. Also check your oil to make sure it's not milky white. That means your oil is mixing with the coolant from a blown head gasket. That can happen if the engine overheats severely. Head gasket repair is very expensive.

Jul 12, 2009 | Geo Tracker Cars & Trucks

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