Boxster Coolant Leak

[BimmersInGA]

Another question: Does the coolant have some kind of vent or overflow? The reason I ask is because I accidentally overfilled the tank in the trunk, but didn't spill anything on the ground. However, there is now a large puddle under the rear of the car. I have never seen one in that area until I overfilled the tank. So I'm hoping it's just because I put in too much coolant.

I have since sucked out the extra and have the level right at the "MAX" mark.

[Bobiam]

The pump is nowhere near the front, so that's another issue.

Check under the car at the front corner for minor scraps or other damage that may indicate that the car's nose dropped on a curb while being parked. I bought mine with such a problem. The upward impact cracks the plastic locating piece and radiator end at the left end (looking rearward at the front of the car) of the radiator. You likely will not be able to see the leak that I described with the bumper on. In the attached photo look carefully for a cross shape at the end of the locator. That's what I had that was leaking.

I'd be cautious about the BMW coolant as it may have something special formulated especially for BMW.

If you are ambitious and can lay it up a little longer, the pump change would be prudent while it's drained down.

As for filling it, do a little more research. While filling it, crawl under and burp all the big hoses to get some air out. I disconnected hoses at low points to drain it too....that worked well.

[stephe57]

Originally Posted by BimmersInGA

Another question: Does the coolant have some kind of vent or overflow? The reason I ask is because I accidentally overfilled the tank in the trunk, but didn't spill anything on the ground. However, there is now a large puddle under the rear of the car. I have never seen one in that area until I overfilled the tank. So I'm hoping it's just because I put in too much coolant.

I have since sucked out the extra and have the level right at the "MAX" mark.

Yes the 986 expansion tank has a plastic plate that can be removed if you take off the Coolant cap and the Oil fill cap. It the plastic base that sits under the caps. That is where you coolant over flow will be at. If you take a small bottle of water and poor it around the coolant and oil fill cap you will notive it leaking on the floor at the right rear tire. Normal.

-Ty

*Speed Yellow 986*