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Post by johnbirmingham on Jun 7, 2006 6:42:24 GMT
Whilst lying idley under the rear axel recently I was struck by the strong smell of fuel from the breather pipe.It was not a particularly hot day so I got to musing on how much fuel (or it's volatile fractions ) were being lost,and the fire hazard. Modern cars don't seem to breath freely to atmosphere and often give a "pfftt" when the cap is removed,admitting or expelling air depending on whether the car has been standing for long.They must have a valve in the breather line to let air in as the fuel is used and to stop the escape of vapour when standing.This last must have very critical limits to prevent pressure building to silly levels. I fancy fitting such a valve to the P5 and wondered if it had been tried before and if anyone knew of a suitable source/doner vehicle.All comments gratefully recieved. John
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Post by Phil Nottingham on Jun 7, 2006 21:14:44 GMT
I have never actually noticed any petrol fumes under my cars - perhaps overfilling/enthusiatic cornering has let petrol into the breather?
It is a rather convoluted set up though which is supposed to ensure any fume condense back into the tank.
You are not confusing the filler cap drain with the breather outlet are you?
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Post by johnbirmingham on Jun 8, 2006 7:56:13 GMT
Thanks Phil , The car had been standing for a couple of weeks and the filler cap drain is a big fat rubber job on this car , the breather being a smaller black plastic pipe. It's the breather alright.Do you spend idle hours lying under there too ? I've seen the pipework above the tank - O.K. for letting sloshed fuel run back but it seems a bit too warm up there for codensation; bags of space for a nice little valve though. I wonder if the petrol companies have been adding liquid gas to the petrol lately ? John. PS. I note your demotion with regret ; are the politically correct taking us into a Godless age ? Where's the fun in that ?
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