Printable Version | Subscribe | Add to Favourites
New Topic New Reply
Author: Subject: Wideband sensor safe sealant
ChrisL

posted on 21/5/19 at 07:52 AM Reply With Quote
Wideband sensor safe sealant

Hi,

In the process of putting the car back together and have fitted a wideband 02 sensor. Does anyone know what exhaust sealer is suitable and won't damage the sensor. I was looking at using PlumbaFlue bout not sure if it is safe, alternatively I could use Holts FireGum but don't know if that's safe either!

TIA
Chris

[Edited on 21/5/19 by ChrisL]

View User's Profile View All Posts By User U2U Member
40inches

posted on 21/5/19 at 08:10 AM Reply With Quote
I used the cheapest silicon sealer I could find, and never had a problem. I think that when the sealer has cured (24hrs?)
all the harmful gases have gone.

View User's Profile View All Posts By User U2U Member
Theshed

posted on 21/5/19 at 08:57 AM Reply With Quote
All the sensors I have ever seen seal using a crushable washer at the top of the thread. They do not need to seal on the threads and would be a bit of a pig to remove if they did. They come coated in anti-seize compound so I would just use that.

I do not pretend to know but I understood that wideband sensors hated silicone. In any event surely a silicone sealer would burn off in seconds?

View User's Profile View All Posts By User U2U Member
ChrisL

posted on 21/5/19 at 09:36 AM Reply With Quote
The sealant would be for the exhaust joins and not the sensor itself
On the once it is cured it'll be OK, not sure if that's true as I'd imagine it'll give off more fumes the first time it is heated. And that probably holds true for whatever sealant is used...

[Edited on 22/5/19 by ChrisL]

View User's Profile View All Posts By User U2U Member
Theshed

posted on 21/5/19 at 09:56 AM Reply With Quote
Oops sorry I misunderstood the problem. Why not use a sealer recommended by an OE manufacturer that uses wideband sensors? Or...use any old crap and leave the sensor out for a few heat cycles.
View User's Profile View All Posts By User U2U Member
40inches

posted on 21/5/19 at 03:33 PM Reply With Quote
quote:
Originally posted by Theshed
I do not pretend to know but I understood that wideband sensors hated silicone. In any event surely a silicone sealer would burn off in seconds?

What can I say? Four years on and no leaking joints and the sensor is still doing it's job.
Andy Bates also uses the cheapest silicon sealer he can find

View User's Profile View All Posts By User U2U Member
ChrisL

posted on 21/5/19 at 03:38 PM Reply With Quote
Cheers for the advice chaps will let you know how I get on...
View User's Profile View All Posts By User U2U Member
MikeRJ

posted on 22/5/19 at 10:19 AM Reply With Quote
As mentioned you don't need any sealant on a W/B sensor, they use a crush washer for sealing just like a spark plug. The silvery coloured grease you get on the threads of new sensors is an anti-seize compound. I've used copper grease when refitting them with no issues.
View User's Profile View All Posts By User U2U Member

New Topic New Reply


go to top






Website design and SEO by Studio Montage

All content 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [ 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.