Hi, I purchased a used 2007 Montana last week and it'* been in the shop getting some work done. When I purchased the van I was aware there was a transmission leak, and it looked like it came from two small pipes that ran in front of the engine near the bottom. They were/are complete rust. Speaking with my mechanic before purchasing it, he informed me it was a common problem but easy fix. Well, he fixed the issue, but looking inside the engine bay, the leak must have been somewhere else close by, and he must have been thinking about something else because the rusted pipes are still there.

Can anyone tell me what the two rusty pipes are for in the picture below, and would it be worth it to replace them now, seeing as how they are pure rust? I'm just thinking of preventative measure, unless I really don't need to worry about it now, or the cost will be a lot. Thank in advance for any replies.

Transmission cooler lines?

Just follow the lines...they come out of the bottom of the transmission on the driver'* side, and the other ends go into the radiator cooler on the passenger side.....like 2kgfu said, they are your transmission cooler lines....

On your repair bill, what is stated that he replaced?

I'm not sure yet as I haven't received the invoice. There was quite a lot of work I had to put into the van, I think the previous owner aimed for every pot hole known! And she didn't really do any maintenance so unfortunately I'm doing it now.

It'* a 2007 Montana SV6 with 140K KM'*. In the past few days it'* had the following done:

New tires, New exhaust from the catalytic converter to the back (was beyond dead), new front wheel bearings (both sides), rear breaks, transmission hose leak fixed, fluids/oil change, and this weekend it'* having the struts/springs & rear shocks replaced as the lady must have aimed for the pot holes.

I'll talk to my mechanic and find out what they did for the transmission fix. But I'm also wondering if I should just go ahead and replace those cooler lines now, instead of waiting until the rust eats through.

It drives nice now through... minus the struts being gone. The last thing I'm thinking of changing since it'* almost at 150K KM'* is the spark plugs. I was thinking of doing this myself until I read how much of a pain the rear ones are.

I think those rusty tubes are actually a single tube.

One end comes off the steering pump, heads around the front of the engine, then loops back passing underneath the steering pump....along the subframe and then ultimately connects onto the steering rack.

Here is a pic of the p/* tube.....kinda difficult to determine how big it it is with no background to compare it to. But it is basically long enough to wrap around the motor.

The pictures in the OP'* original post are two separate lines. One is a feed line the other is the return line.

Not trying to be argumentative here. But I honestly think those lines are not two separate lines. I think they appear to be two separate lines because the ends of them can't be seen. I think, the line exits the picture, loops back around, re entering the picture leading one to believe the line is two separate pieces.

I understand that the trans cooler lines run in the same general DIRECTION as the lines shown, but the trans lines would be secured below the edge of the radiator, these lines appear to be secured to somewhere nearer the engine block.

One other thing, following the lines to the left, I can see they disappear as they travel underneath the passenger side of the engine which is the side where the steering pump is located.........the transmission is located on the drivers side. I cant see the transmission end of the lines, but judging from this picture, I believe those lines are not related to the transmission.