Clack

some from a crack in the hose from the bottom of the expansion tank to the radiator. I know I need to replace that hose. My local mechanic thinks the coolant pump is to blame for the coolant on the intake manifold.

Does this sound right? I've replaced my exhaust gas temp and o2 sensors before. Is this a much tougher job? Still a do it yourselfer?

fwiw I don't believe I'm losing any coolant internally.

complacentsee

Sounds like after run coolant pump. Also called aux coolant pump.

Clack

Thanks complacentsee. Do you know if the intake manifold needs to come off to replace this?

complacentsee

There are ways to do it without taking the intake manifold out.

When I did mine, I had the engine out of the car so just took off the intake manifold. I personally think it would be less of a pain in the *** to take it off, but to each thier own.

donromani

I would take it off if I were you. Go buy some replacement hose clamps (the 1/2 inch to 1/4 inch) for all the one-time use clamps you'll be taking off.

Texas Twin T

2nd on removing the manifold,it only took me 3hrs for the job. I think tring to get the pump back in the mounts would be a PITA without removing the manifold.

bingS4

I've read something about making sure you replace O-rings around the afterrun pump but I don't have full information and haven't had to do it myself yet. You might want to look into that.

MingsS4

It happened to me yesterday. Had to have my car towed home.

Any other maintainance I should perform while I'm in there replacing the aux pump?


Found some info here: http://www.myaudis4.com/info_coolant_leak_pg2.htm

Texas Twin T

I would check your TBB and your F-hose if you have one.

bingS4

Yes, especially as the cars get older. Many replace the aux pump, many delete it altogether. It's not needed unless you run the car really hard and then turn it off without letting it cool down. If you've never heard it running after you turn the car off, then you probably don't *need* it.