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General Category >> Rubber Side Down! >> Yellow pipe .....under warenty?
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Message started by Ramsforever on 07/29/08 at 18:21:01

Title: Yellow pipe .....under warenty?
Post by Ramsforever on 07/29/08 at 18:21:01

Could I make them change it?

Just curios.

Bought it new three months ago.(no miles) 2007 S40 (7000+ miles now)

Is this the lean thing that causes it?

Title: Re: Yellow pipe .....under warenty?
Post by Bleemus on 07/29/08 at 18:27:02

Lean is blue. Yellow is rich. Doubt you could ever get anyone to replace it under warranty.

Title: Re: Yellow pipe .....under warenty?
Post by Ramsforever on 07/29/08 at 18:37:01

624C45454D5553200 wrote:

Lean is blue. Yellow is rich. Doubt you could ever get anyone to replace it under warranty.

Rich?

I thought the backfiring was from lean?

It backfires when I turn it off, and when I deaccelerate.

I am confused now.

Title: Re: Yellow pipe .....under warenty?
Post by T Mack 1 on 07/29/08 at 19:46:53

Ok.... the color change in metals, chrome included, happens in stages. Heat causes the change. (remember those days in high school shop where the teacher made you temper a piece of metal????? and you thought you would never need it...... ;D)

On chrome it starts out as a yellow, then goes to a gold, to a brown, to blue then finally a ugly gray.

There is a color chart somewhere on the net that tells you the time /temp for each stage. I vaguely remember it also had something about temper/hardness......

Title: Re: Yellow pipe .....under warenty?
Post by rpgpgmr on 07/30/08 at 10:28:55

7,000 miles in three months ... wow I'm impressed! I've got almost 10,000 in 14 months and I thought I was really doing something. ;D Mine started to yellow in a few months too and then gold to a tarnish kind of brown (just like T Mack said). Yes it is from a too-lean condition, and no it's not covered under your warranty. The EPA is the reason for your yellow pipes.

I bought a new pipe and re-jetted so I haven't had any more discoloration. That's what I'd suggest for you to do.

Title: Re: Yellow pipe .....under warenty?
Post by T Mack 1 on 07/30/08 at 12:19:15

RE-Jet now!!!! Then get some of the Bluing cleaners (Blu-Away etc etc etc). Yellow chrome cleans up real nicely..... Gold & Brown a little less and blued pipe require elbow grease........