Fwd: <VV> Re: FUEL SYSTEM NO NO

[HallGrenn at aol.com]

In a message dated 9/11/2006 8:20:09 PM Eastern Daylight Time, N2VZD at aol.com 
writes:

> please do not blow air thru  your fuel systen against the direction of 
> normal 
> flow...unless it is just thru the fuel line before the pumps!  it will 
> damage 
> the valves in the pump or at least blow the "sock" filter off the sender. 
> then later on the crud will really move forward. it is still always better 
> to 
> blow from tank forward...carefully. if blowing is going to fix or help 
> anything 
> low pressure in the filler while holding a rag around the blowgun will give 
> you 
> plenty of pressure.
> let common sense prevail....
> regards , tim colson
> 

I agree with Tim.  Recently a good mechanic was trying to find a blockage in 
one of my car's fuel lines by blowing out the lines with compressed air.  He 
didn't know that I had already checked the lines.  He showed me a blownout 
crack in the fuel line from the rear wheel well to the fuel pump.  The assumption 
was that water had gotten into the line somehow and frozen thus expanding and 
cracking the line.  I didn't buy it at the time but he was sincere and very 
careful with the rest of his work and he may have been right so there was no 
point is discussing it further.  Everything has been repaired now--his work and 
mine and the car runs fine.  But Tim's comment is right on--it's a low pressure 
system and pressurizing the tank works most safely.  If the lines are out of 
the car compressed air is fine, but not on a complete system.

Bob Hall
Group Corvair
'64 Brier
'65 Corsa
2 '68 Monzas