Plumbing dribble

[Toehead]

Yes, but RTV is also used by OEMs to seal thermostat housings and water pump housings. They make RTV for coolant applications, such as this.

https://www.amazon.com/Permatex-22071-T ... B0007TQW60

If you use the right grade, it works fine.

[CYBORG]

Yes, but RTV is also used by OEMs to seal thermostat housings and water pump housings. They make RTV for coolant applications, such as this.

https://www.amazon.com/Permatex-22071-T ... B0007TQW60

If you use the right grade, it works fine.

agreed. That particular one is designed for water applications'. I agree there are specific blends that work in specific applications. But there are gasket dressings that work in a number of different applications,....which I prefer

[tlbranth]

Hey Death, pleeeeeeease fix the spelling of 'plumbing'. I'm used to forum subscribers not being able to construct a sentence or spell anything over 3 letters long, but the title is right out there and makes me run for more whiskey.

[DUGG]

Right stuff, let me repeat that, Right stuff. As with ANY gasket sealer the surface must be clean and free of all contaminants. In my Auto repair shop we use Right stuff on many of the repairs we do. I use it on water pump, thermostats , oil pans etc. as a dressing to insure that they will seal. I don't have time to go back and redo a 4-5 hour repair because of improper sealing.
If I had installed that o-ring I would of put a small film of right stuff on it before installing it.

[deathbypizza]

I used pure black gasket maker along with the o rings on all parts of the plumbing. I'll be reinstalling tonight and putting fluid in to see if it still dribbles. Thanks for all the help.
The sensor is for my acewell unit.

[deathbypizza]

Well I thought I had fixed the issue. I put in the orings and also used black gasket maker to fill in any spots I thought it may be looking from. Well it's still leaking. This is the 3rd time I've taken it apart.

[tlbranth]

Check to confirm it's not leaking out of the end of the upper radiator hose. Those clamps have to be super tight -- tighter than I thought they needed to be -- or you will get a dribble. Also, if I remember correctly I smeared a little vaseline on the o-ring seal when I put it together, to prevent it sticking.
Steve

+1 on the radiator hose note and also on lubing o-rings. I use some stuff called Sil-Glide. Bought it in the 60's so I reckon it's a lifetime supply. I sort of almost understand 77's concern about petroleum products on rubber (subsequent post) except I'm pretty sure all the o-rings on the bike are Buna and many are subjected to fuel & hot oil. So I reckon a little vaseline won't hurt. But what do I know.

[deathbypizza]

Well i added a second oring in the part that goes into the block. I think I found where it's coming from. As someone suspected earlier it's the acewell thermo sensor. It has a washer with a rubber oring in it. But I feel I should have used that now as the old unit was metal to metal. Should I just do away with that garbage washer.
Anywho here's the video. I thought it was the body of the thermostat first. So maybe it's this sensor washer. Here's a YouTube I uploaded. https://youtu.be/O8vD6UXiC3k[/youtube]

[ericheath]

Looks like a hole (whole so Tilbranth goes for more whiskey ) in the water housing.

[flyin900]

The original sensor part had an O ring and as I noted earlier that can be your source of the leak and it is hard to determine if it is just a small seep. A lot of work sometimes to find these pesky issues so I am glad you found it.

[scootsx2]

Reseated the oring and put in the coolant. Still a leak. Bummer

A little RTV on the o-ring prior to assembly might not hurt.

I use a film of dielectric silicone grease when fitting o-rings and similar rubber parts. It will hold the o-rings in place during assembly (make sure the mating surfaces are clean first), helps things slide together and doesn't attack the rubber.

[DUGG]

Is it possible that you have straight cut thread on the sensor screwed into a tapered pipe thread?