Coolant leak out of pipe above alternator. What is it? *pics*

[Rengar18]

So im leaking a fair amount of coolant out of this pipe right above the alternator. It actually ended up killing the alternator because its been dripping on it for a couple weeks

It turns from dripping out to pretty much pouring out when I either take off the radiator cap or when I start the car and its warming up. It just leaks out a ton of a coolant.

Replacing my alternator now and took a few pics of the leak spot. What exactly is this pipe and is it easy to replace? I dont know why it started leaking all of a sudden. It leaks right out the crevice where the pipe routes up towards the timing belt/water pump.

heres a pics looking downwards towards the pipe (have a little jb weld on there trying to seal it)

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Heres a pics from under the car looking at it (alternator is removed) From the little pipe its upwards.

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Can take more pics if not clear enough, thanks.

 

[EvoRage]

That is the Water pipe or coolant pipe. At that particular area it is connected to the water pump and it's sealed by an o ring. Did you put any pressure on that pipe or anything? Has it ever been replaced? If you are going to replace it go to the dealer and order it. It is pretty annoying to change because alot of things have to be moved aside to get it out.

 

[92AWDHX40]

There is a seal there its leaking it has to be replaced its a cheap part, jb weld wont work, replace it.

 

[DSM1G90]

...and the WP has to come out to replace that "O" ring, which means timing belt has to come out ... lotsa work involved to cure a leak.

 

[LiquidX]

Actually the water pump doesn't need to come out. Unbolt the t stat housing and then you can pull the pipe.

As said before, there is a fat oring on the end of the pipe where it connects into water pump. Check on a supporting vendors site and you can get the o ring. Be sure to lube it up good before you put it on the pipe and fit it into the water pump.

If the pipe itself is cracked, contact garymitsu via PM and request a new water pipe. I forget the name of the company and mix the 2 up so I won't say the name.

lotsa work involved to cure a leak.

Any leak is a bad leak and leaking coolant at that rate will cause serious issues if it isn't fixed besides new alternators.

 

[92AWDHX40]

Exactly i just fixed mine ahhh, but its done.

 

[9!'clipseDOHC]

Actually the water pump doesn't need to come out. Unbolt the t stat housing and then you can pull the pipe.

The thermostat housing doesn't even need to come off either (at least on a 1g). All you have to remove is the 12mm bolt that secures the water pipe to the block. It is located right behind the turbo's compressor housing just under the head. It will also make it a lot easier to get to the o-ring if you at least unbolt the power steering pump.

If the pipe itself is cracked, contact garymitsu via PM and request a new water pipe. I forget the name of the company and mix the 2 up so I won't say the name.

Mitsubishi Graveyard. You can also check the classifieds. Anyone parting out there car won't really need their water pipe.

Here is the water pump o-ring, part # MD030764 on Extreme PSI for $3.62 (don't for get their free shipping with $7.50 handling fee)

And JNZ tuning for $2.81. (If you call and talk to Paul he should just drop it in an envelope and save you some money on the shipping)

Hope this helps!

 

[Rengar18]

Oh great, thats not too bad then. Those first few post there had my thinking "oh god".

As far as I know there hasnt been any pressure put onto the pipe. Jst started leaking out of nowhere.

Im assuming this is the said oring here?

STM - WATER PUMP/PIPE O-RING | OEM MITSUBISHI | 90-99 DSM | MD030764

thanks alot guys.

 

[9!'clipseDOHC]

Im assuming this is the said oring here?

STM - WATER PUMP/PIPE O-RING | OEM MITSUBISHI | 90-99 DSM | MD030764

thanks alot guys.

Yes that is the same one as well, Part# MD030764.

I also posted 2 links to the same o-ring for less $$$ if you noticed above.

 

[cookmeup272]

the O ring is 2 bucks for a fel pro or 1.30 for a beck/arnley at Advance Auto...I have to replace it as well

 

[LiquidX]

The thermostat housing doesn't even need to come off either (at least on a 1g). All you have to remove is the 12mm bolt that secures the water pipe to the block. It is located right behind the turbo's compressor housing just under the head. It will also make it a lot easier to get to the o-ring if you at least unbolt the power steering pump.



Mitsubishi Graveyard. You can also check the classifieds. Anyone parting out there car won't really need their water pipe.

Here is the water pump o-ring, part # MD030764 on Extreme PSI for $3.62 (don't for get their free shipping with $7.50 handling fee)

And JNZ tuning for $2.81. (If you call and talk to Paul he should just drop it in an envelope and save you some money on the shipping)

Hope this helps!

Thank you for clairfying for me. It takes a bit of time to get all links and search around on a phone and didn't have time earlier.

I was unaware that the 1g pipe will just drop right down but that doesn't see right as the t stat side is a flared end. Unless there was a compression fit then I would think it would cause it to leak especially if you are saying that only 2 bolts are keeping it on.

The 2g pipe needs to have one or the other removed to pull the pipe out.

 

[9!'clipseDOHC]

Thank you for clairfying for me. It takes a bit of time to get all links and search around on a phone and didn't have time earlier.

I was unaware that the 1g pipe will just drop right down but that doesn't see right as the t stat side is a flared end. Unless there was a compression fit then I would think it would cause it to leak especially if you are saying that only 2 bolts are keeping it on.

The 2g pipe needs to have one or the other removed to pull the pipe out.

Yeah, I'm at home on my laptop so it is much easier! I just went and double checked on mine and it is only attached to the thermostat housing with a rubber hose, so no need to remove the thermostat housing.

On a 1g (at least) the water pipe pushes into the water pump and is sealed with the above stated o-ring. At the other end it attaches to the lower radiator hose, and at the end of the smaller diameter part, which goes along the side of the the engine, it attaches to the heater hose. There is 1 small rubber coolant hose which runs up to the thermostat and one metal line which goes to the turbo. There are 2 bolts holding the water pipe in place, one by the compressor housing/ exhaust manifold and the other on the side by the transmission.

 

[LiquidX]

Yeah, I'm at home on my laptop so it is much easier! I just went and double checked on mine and it is only attached to the thermostat housing with a rubber hose, so no need to remove the thermostat housing.

On a 1g (at least) the water pipe pushes into the water pump and is sealed with the above stated o-ring. At the other end it attaches to the lower radiator hose, and at the end of the smaller diameter part, which goes along the side of the the engine, it attaches to the heater hose. There is 1 small rubber coolant hose which runs up to the thermostat and one metal line which goes to the turbo. There are 2 bolts holding the water pipe in place, one by the compressor housing/ exhaust manifold and the other on the side by the transmission.

Must be nice I honestly forgot about the 1g bay pictures with the lower rad hose being hooked up to it. Wonder why they changed it

After denting my waterpipe to fit my HX40 I wanted to take it out and repaint it but I didn't have everything needed to get it back on nor did I want to go through all that work to change it out.

 

[9!'clipseDOHC]

Must be nice I honestly forgot about the 1g bay pictures with the lower rad hose being hooked up to it. Wonder why they changed it

I had no idea that the 2g water pipe was different. I wonder why they changed it as well. So on the 2g it connects directly to the thermostat housing?

 

[LiquidX]

1g

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2g (mine )

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