Vent screw / bleeder screw...

[Rick L]

Do vent screw (bleeder screw) go bad? I think I'm leaking coolant from the vent screw even though it is closed tight. Or is the vent screw suppose to do that???

[winfred]

they can crack and the o-ring can go bad

[Dr. evil]

be carefull not to overtighten when that platic gets hot you can twist the head off of the screw

[Rick L]

Maybe I over tighten it and damaged it. So it shouldn't leak from the vent hole of the screw even though it is closed tight, right?

[repenttokyo]

mine was bad, it's a cheap part to replace.

[Dr. evil]

no it should not leak.

replace the o-ring and it should seal

[mikeythekidd]

Yes...mine broke. Had no choice but to pick one up @ local stealer. I almost dropped to my knees when I found out It was less than $20. (Actually around $5). I even kept the reciept 'cause I know no one will believe me.

[clindahl]

Be careful. I "lost" the bleed screw on my E34 and had to pick one up that was listed as the correct part number for the car. It screwed in and stopped with the O-Ring, but for whatever reason the threads didn't engage to well and popped out the first time it went to pressurize. The old bleed screw was painfully recovered with a 16" piece of wire with double sidded tape and about an hour of cussing. Screwed that back in, and no leak since......YMMV

[Rick L]

Thanks for the info guys. By slightly loosing the screw seemed to stop the leak. Over tightening it actually causes leak. What a flimsy piece! I'll pickup another screw at the dealer tomorrow.