[Vwdiesel] Banjo hits sour notes

[The President]

So is the hole on the inside of the bend ... fatigue?
Or is it on the outside... erosion?
Mark

Even steam erodes pipes on bends!


>From: Justin and Michella Bennett <cjb at midrivers.com>
>To: vwdiesel at vwfans.com
>Subject: Re: [Vwdiesel] Banjo hits sour notes
>Date: Thu, 05 Jul 2007 11:12:07 -0600
>
>Yes.  The pinhole is caused by the erosion of the line material by the
>fuel as it makes the turn in the bend.  High pressure fluids that are
>moved by a piston type of pump seem to cause this more than fluids ran
>by rotary pumps.   Unfortunately unless you own an ultrasound or x ray
>machine you cannot measure the amount of wear in the corners.
>Justin
>
> >  Seems the 2nd from flywheel end metal line from the injection pump (85 
>Jetta TD engine) has sprung a pinhole leak where it turns to go into the 
>injector.
>
> >  I didn't expect a metal line to develop a pinhole leak. There wasn't 
>any metal to metal tube rubbing. Biut the injector lines are missing the 
>rubber separators, so maybe some vibration created a stress point. Anyone 
>experience this kind of problem?
>
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