travisnd

Have "new to me" Wilwood SL6Rs on the car and have been getting the car setup for VIR in October (will be the first time using them). I noticed that after bleeding, a little bit of fluid comes up from the threads and can be seen in the top of the brass insert that the bleed screw threads into and seats into. I cleaned them thoroughly and used compressed air and brake cleaner to get them 100% dry. On one of the bleed screws it came back again, then I cleaned again and it's been fine. I'm assuming this is fluid that gets up into the threads when the bleed screw is loosened to bleed? Nothing comes out of the top which leads me to believe the screw is seated and sealing properly.

In the past I've always had OEM C5 calipers with inboard bleed screws so I never check/see them again after bleeding and cleaning. Plus they have the OEM rubber boot which has the rubber collar that covers the base of the screw where it threads into the caliper body.

My father has Brembo 4-pots on his race car and he said he noticed the same thing and that it won't come back. Just wanting to double-check and make sure I don't have a potential problem as it will be a busy weekend doing comp school and racing.

Kubs

I have no experience with the Wilwoods, but the bleed screw does not seal on the threads it seals on the taper. When you bleed them its not uncommon to see fluid come out the thread area as well (one of the reasons I dont like speed bleeders). As long as no more comes out in use I would say you are good.

CHJ In Virginia

I get the same thing on my Wilwoods, a slight seepage around the threads after bleeding. Not to worry. As long as the bleeder screw is seated properly, you will be fine. It's probably ****, but with the number of times I bleed in a season, I swap out bleeder screws at the end of every year.

travisnd

Thanks for the confirmation

0Todd TCE

You're looking at what remains between the tapered seat the the top of the nipple is all. The bleed passage way is down near the base of that bleed screw.

Two thoughts however:
1. Rinse with water
2. Blow carefully or you'll be spraying brake fluid all over the car.

travisnd

I wiped with a paper towel then used my air gun to get the last little bit. I only cleaned it to that extent to monitor/test what was happening. The fluid being there doesn't concern me by itself... just wanted to make sure it wasn't a symptom of a bleed screw wearing out and not seating properly. I understand how bleed screws operate i.e. sealing with the tapered seat vs. threads. Thanks for backing up what everyone has said so I don't have to worry about it.

John Shiels

just loosen the bleed screw as the outer part is made to be replaced. Some have mistakenly loosened the part threaded into the aluminum.

travisnd

Only loosening the bleed screw. I have the brass insert sealed with teflon tape. That's just there so you don't wear out the aluminum caliper body over time.

Jason

Speedbleeder sells some thread sealer you can reapply.

John Shiels

some loosen that all the time too.