[DML] Re: Can Fuel Injector Cleaner additive damage o-rings

["bitsyncmater" <david.mckeen@xxxxxxxxxxxx>]

This same thing has happened to many of us.  Mine did it twice and I don't use any fuel additive.  Those O-rings are swelling with today's fuel.  Viton does not swell.  I ran a swell test with Viton and buna-N.

--- In dmcnews@xxxxxxxxxxxxxxx, "John Marconi" <giantscorner@...> wrote:
>
> All
> 
> Does anyone have knowledge of Fuel Injector Cleaner additive possibly damaging the O-rings on the Primary Fuel Pressure Regulator.
> 
> A few months ago I fixed a warm start problem by replacing the 2 primary fuel pressure regulator O-rings.  The smaller O-ring had a small chunk missing which apparently was affecting my rest pressure. Well, the problem returned and I found the same thing, a small chunk missing from the smaller O-ring.  The only thing I can think of is I put in some Fuel injector additive about a month ago.
> 
> Some side info to ponder.  I did not use anything to lubricate the O-rings when istalling, I was concerned with it causing a clog down the line and felt the fuel should act as a natural lubricant when installing.  
> 
> Could there be a metal burr or something in the fuel distributor that is damaging the O-ring upon installation.
> 
> Thanks
> 
> John Marconi
> VIN 3760
>




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