Expansion Tank Bleeder Valve
 

A couple of years ago I replaced my coolant expansion tank with an after market. two years later I started losing coolant again it and a mechanic diagnosed it at the ventilation bleeder valve. The tank is no longer under warranty and I can take an inexpensive way out by replacing the bleeder valve instead of the entire tank. 1)Does anybody have experience with this? Seems easy enough, but is it really? 2)Could I have something else going on in my cooling system that might have caused the bleeder to fail (other than a poor quality replacement)?

Easy to do, just (gently) remove the bolts and swap in a new o-ring and bleeder valve.
When I replaced my coolant tank, I kept the bleeder from the old tank as a known good used part.
You know, just in case.

Thanks!!! I heard those screws strip easy. Do you know if the valve is a certain orientation. I'll mark the alignment of the one I remove. I saved my old tank, but cleaned out my garage a few months ago. I'm afraid it may have been tossed!!! I see them online $45 with oring and hardware.

I just replaced both o-rings in about 30 minutes for $6 worth of Pelican Parts. Sneak up on the torque of the screws. When they are snug they're tight.

I replaced it a few days ago being extra cautious of over torquing. Everything appears successful. Got through a 99 degree South Carolina weekend without over heating or coolant loss!!! However... today the check engine light came on. Not sure if one is related to the other. I’m guessing that light is indicating an emissions fault somewhere?!?!

The CEL could be anything. Plug a code reader into it and let us know what the number is to start. Gas cap tight?

Agree with Rex
 

Throwing parts in is no good unless you have a direction to throw them in.

I hope you get this worked out

Cel
 

I recalled a couple years ago the CEL came on and my non-scientific corrective action was to race it to 6000 rpm. The light came off. Not certain if I was lucky, or perhaps cleared something out of the emissions system. Anyway... it didn't work this time. Autozone plugged it in for a P1411 and P0410 (Air Injection Control Solenoid).

I just left the gas station for what I believe is my second fill-up since the light came on. As I pulled away I noticed the light off. Maybe something with the cap??? In any event I am over due for an 80K service anyway.....