coolant leak and O-ring
#1
coolant leak and O-ring
I think I have coolant leak by O-ring where the water pump is connected to the tube going to the back. Do I need to take off timing belt and water pump to get to it or can I just take off plenum to replace the O-ring? I have 2000 Montero Sport XLS 3.0.
#2
Sorry but your diving in kind of deep to replace this.
There are several 0-rings.
Posts 80 and 82 show the o-ring at the back of the water pump
https://mitsubishiforum.com/forum/mi...l-48920/page8/
https://mitsubishiforum.com/forum/mi...l-48920/page9/
Post 88 shows the pipe with 0-ring to back of pump below the plenum
https://mitsubishiforum.com/forum/mi...l-48920/page9/
Post 110 shows the crossover pipe which also has o-rings
https://mitsubishiforum.com/forum/mi...-48920/page11/
Sounds like your leak is at the water pipe to the back of the pump.I think if you pull the plenum and the intake then you can remove the water pipe to replace the o-ring and leave the timing belt alone. See Post 83 last picture which shows how the water pipe is attached at the rear of the engine.
https://mitsubishiforum.com/forum/mi...l-48920/page9/
Good luck!
There are several 0-rings.
Posts 80 and 82 show the o-ring at the back of the water pump
https://mitsubishiforum.com/forum/mi...l-48920/page8/
https://mitsubishiforum.com/forum/mi...l-48920/page9/
Post 88 shows the pipe with 0-ring to back of pump below the plenum
https://mitsubishiforum.com/forum/mi...l-48920/page9/
Post 110 shows the crossover pipe which also has o-rings
https://mitsubishiforum.com/forum/mi...-48920/page11/
Sounds like your leak is at the water pipe to the back of the pump.I think if you pull the plenum and the intake then you can remove the water pipe to replace the o-ring and leave the timing belt alone. See Post 83 last picture which shows how the water pipe is attached at the rear of the engine.
https://mitsubishiforum.com/forum/mi...l-48920/page9/
Good luck!
#3
Thank you, Larry. I changed the valve stem seals on this Montero Sport before, so I will dig it up again to get to the Oring. It seems the leak is coming out from the block right by the altnator, so I’m guessing it’s faulty Oring.
#4
Thanks in advance!
#6
Thank you
#7
Figuring out a similar leak issue, after replacing the water pump and noticing coolant pooling on top of the block and dripping down the transmission. Removed the Plenum and manifold to get access to the water pipe, which is pretty easy and straightforward, not that big of a deal. Following the FSM steps but can't seem to get the water pipe to seal to the water pump. Is it a bad idea to put gasket sealer around the pipe? It seemed like someone had done that on the old WP.
#8
Figuring out a similar leak issue, after replacing the water pump and noticing coolant pooling on top of the block and dripping down the transmission. Removed the Plenum and manifold to get access to the water pipe, which is pretty easy and straightforward, not that big of a deal. Following the FSM steps but can't seem to get the water pipe to seal to the water pump. Is it a bad idea to put gasket sealer around the pipe? It seemed like someone had done that on the old WP.
#9
We have very different shaped coolant passages. I have the 6G72 3.0L, so older engine but same concept.
Mine was 100% coming from the water pipe as the end is a little corroded and was not fitting snugly. But I could see how you get the same issue if it leaks from one of the front two coolant passageways. I noticed on mine that the coolant was pooling under the water pipe flange, then running down the top of the engine and off the transmission like a gutter.
My solution is by no means the correct way (replacing the pipe), but it worked. I put the old o-ring behind the new o-ring with a bead of gasket sealer in between so I could fill the voids and get a water-tight seal. Been cruising around for a week with no leaks.
Mine was 100% coming from the water pipe as the end is a little corroded and was not fitting snugly. But I could see how you get the same issue if it leaks from one of the front two coolant passageways. I noticed on mine that the coolant was pooling under the water pipe flange, then running down the top of the engine and off the transmission like a gutter.
My solution is by no means the correct way (replacing the pipe), but it worked. I put the old o-ring behind the new o-ring with a bead of gasket sealer in between so I could fill the voids and get a water-tight seal. Been cruising around for a week with no leaks.
#10
We have very different shaped coolant passages. I have the 6G72 3.0L, so older engine but same concept.
Mine was 100% coming from the water pipe as the end is a little corroded and was not fitting snugly. But I could see how you get the same issue if it leaks from one of the front two coolant passageways. I noticed on mine that the coolant was pooling under the water pipe flange, then running down the top of the engine and off the transmission like a gutter.
My solution is by no means the correct way (replacing the pipe), but it worked. I put the old o-ring behind the new o-ring with a bead of gasket sealer in between so I could fill the voids and get a water-tight seal. Been cruising around for a week with no leaks.
Mine was 100% coming from the water pipe as the end is a little corroded and was not fitting snugly. But I could see how you get the same issue if it leaks from one of the front two coolant passageways. I noticed on mine that the coolant was pooling under the water pipe flange, then running down the top of the engine and off the transmission like a gutter.
My solution is by no means the correct way (replacing the pipe), but it worked. I put the old o-ring behind the new o-ring with a bead of gasket sealer in between so I could fill the voids and get a water-tight seal. Been cruising around for a week with no leaks.