Common coolant leak???

**BFlan2001** · 10-25-2008 03:24 PM

I've got a pretty significant coolant leak, right now i'm adding some about every 1k miles. i tried to find the source but as you guys all know, there's not a whole lot to see under the hood. so my question is, before i take this thing into a shop, is there a common cooling system issue that i should look into first?

**lowered97a4** · 10-25-2008 03:45 PM

afterrun coolant pump is common it's under the intake manifold toward back drivers side or waterpump thermostat

**BFlan2001** · 10-25-2008 06:52 PM

thanks man i guess i'll check the afterrun coolant pump...is that something i can repair is it a replacement part?

**Daft** · 10-25-2008 07:13 PM

The after-run pump is not a novice level job but, if you are careful and have a good supply of tools you can swap it or buy the OEM relocation kit.

The stock pump replacement is about $110. The relocation kit is about $160 with all the parts.

The relocation kit is part number 078 998 998.

The first thing you can do is remove the plastic motor covers and use a flashlight to look down in the recesses under the intake manifold. If you find pink/white crud down there, then you can be sure that it is the pump leaking.

If not, the rear coolant pipe is a known issue on some 2.7 cars and the coolant reservior can crack and leak too. 90% of the cars end up having a leaky after-run pump. (aka. auxillary pump)

**BFlan2001** · 10-25-2008 09:38 PM

awesome, thanks a lot daft!

i just bought this car a couple months ago so this'll be my first time working on it, but i did a lot of stuff to my old A4 and i own an old bmw that i'm always wrenching on, so i think i can handle it...we shall see!