black spots..dots..speckles on exhaust pipe?
Moderator: Moderators
black spots..dots..speckles on exhaust pipe?
Gents. While doing an oil change today I noticed some black speckling spots on the exhaust pipe. I have heard of the bluing that can happen to the headers but this is occurring on the section of pipe closer to where it connects to the cat.It seems there is more of this speckling on the left pipe than right. Any ideas?
- towerworker
- Lifer
- Posts: 2356
- Joined: Sun Jan 08, 2006 8:11 pm
- Location: Staunton Virginia
Re: black spots..dots..speckles on exhaust pipe?
Are you certain it's not just road tar or the like?
The Older I Get, The Less I know. (in honor of MikeCam
'05 RT
'04 R
'03 R
CB750
KZ750
HD 350 Sprint
'05 RT
'04 R
'03 R
CB750
KZ750
HD 350 Sprint
Re: black spots..dots..speckles on exhaust pipe?
I do not think it is road tar or anything like that. I'll try to get a photo. It is hard to describe. Maybe stipulating would be a good word to describe what I am seeing.
Re: black spots..dots..speckles on exhaust pipe?
That's what I was thinking too. More on the left because of the camber on most roads tapers to the right for water drain off.....towerworker wrote:Are you certain it's not just road tar or the like?
Buckster '03R
#543
#543
Re: black spots..dots..speckles on exhaust pipe?
You bring up a good point. I'll try cleaning the pipes to see if that was the source of the discoloration. Next question, what do I use to clean these things? I am sure the auto parts store has something, but any suggestions are welcome.
Re: black spots..dots..speckles on exhaust pipe?
I'm not fussy about shiny exhausts so use a wire brush if there is any slight corrosion on the exhausts/headers. Black spots are butumen/ashphalt/pitch or whatever is used on the roads. White spirit and turpentine is the stuff to remove it. The shiny rear end gets plenty of black spots.
2002 black 180 degree single spark V twin
Re: black spots..dots..speckles on exhaust pipe?
I don't think I'd use a wire brush but citrus cleaner works on road tar spots as does chrome cleaner.
- Ol' Jeffers
- Member
- Posts: 255
- Joined: Thu Apr 22, 2010 8:04 am
- Location: Aylesford, SE England.
Re: black spots..dots..speckles on exhaust pipe?
I use a worn nylon scouring pad and Solvol Autosol first and then Maguires or similar.. It requires a lot of elbow grease to shine them up
but they can be made to look as good as chrome. It helps greatly if you have access to a motorcycle bench!
but they can be made to look as good as chrome. It helps greatly if you have access to a motorcycle bench!
OJ........everybody's pal!!