Thread: Coolant leak - Need some help

2005 GTP

So what I thought was an oil leak at the oil filter, ended up being a coolant leak somewhere, and I am unsure where to start. Possibly the water pump? But I'm not having overheating issues. And it's not a very big leak wherever it is. I've checked the top and bottom radiator hose, and no leaks there. Below is a picture from underneath the car and the picture is upside down, so the oil filter is to the left in this shot.

lower coolant elbow is my guess. follow the outer tube on the alt bracket to the block, feeling for wetness. engine off of course, your treading the belts to reach in there.

Thanks. I forgot about those things. From 1-10, how difficult is it to do yourself? 10 being the hardest.

its a 1 really if you have any experience wrenching on cars.

just make sure you dont put the longer bolt in the wrong place or you drive it through the valve cover.

the how to. http://www.grandprixforums.net/threa...coolant-elbows

make sure you clean all 4 holes where the elbows live really well. light sanding if need be. then oil the o rings well with oil and slide them in.

Thanks. I can't see the picture in this thread. I'm looking for the 3rd bolt holding the tensioner assembly.

Originally Posted by lawadm1

Thanks. I can't see the picture in this thread. I'm looking for the 3rd bolt holding the tensioner assembly.

There's some decent youtube vids. Try 1AAuto .

http://www.grandprixforums.net/threa...=1512234159072 install this add on then pics show up again.

I finally found the last bolt, feeling around. I replaced both elbows, so we will see what happens. The funny thing is, it didn't look like they were leaking. Oh well, the car has over 100k miles now, and I don't believe they've ever been done before. If it continues to be a mystery, I'll do the dye test that was suggested. Thanks for all the help. Wasn't too bad of a job...just a little messy.

if its still there the water pump could be the next step, you can feel wetness under and behind it, it leaks form a small hole back there.

worst case is its the timing cover.

could even be a heater hose.

Well, it looks like I'm going to have to go with the dye kit. It's still leaking somewhere, but it's not a huge leak. The belt the alternator is on is squeaking because there's some fluid getting sprayed on there from somewhere. What a pain in the a** this has been. And I think it's leaking the most after running the car, and then it cools down. I'm hoping it's not the worst case scenario previously mentioned (timing cover).

Scottydogs mentioned the small hole in the back of the water pump. What's the best way to visually spot that? I thought there was just a gasket and that's it.

It's the 2005 GTP engine. And it's definitely somewhere around the oil filter, because that's what I thought was leaking until I got underneath the car and saw the green coolant. I'm going to use the dye as suggested, and probably focus around the water pump. I have 103K on the car, and the water pump is still the original as far as I know.

I'll check those as well. Thanks. I does seem to only leak after the car has been running, and then is shut off. But it could also be little drips while it's running, and then eventually works it's way down to the ground later on. Hopefully the dye test will tell me, or give me the general vicinity of the leak.