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Hi everybody. I wanted to share what I've discovered in trying to keep my 70 headlamp washer hoses from siphoning fluid when I close the headlamps.
The PV manual says there should be little if any leakage from these hoses due to the "T" check valves near the headlamp doors.
My five-port pump works perfectly, and I've tried several of the original check valves, but I've always had what I considered unacceptable siphoning when I closed the headlamp doors.
I've disscected the check valves, and they have two little rubber balls on each end which theoretically stop siphoning. However, they really only stop siphoning from the hose going to the upper headlamp washer nozzle; due to the near verticle positioning of the check valve when the headlamps are closed, the lower nozzle is always suceptable to siphoning from the hose going to the pump itself.
This lead me to the belief that the pump was allowing water to siphon to the lower water nozzle, even though the little one-way rubber disk diaphrams in my pump seemed nice and flexible.
So I changed the these diaphrams in my pump with new ones, and now the lower headlamp washer nozzles hardly leak at all when I close the headlamp doors.
So I believe (and hope) this is the key to obtaining PV-correct lack of siphoning from the headlamp washer hoses after closing of the headlamp doors.
I hope this proves useful to some.
Regards, Patrick Moresi #45581
The PV manual says there should be little if any leakage from these hoses due to the "T" check valves near the headlamp doors.
My five-port pump works perfectly, and I've tried several of the original check valves, but I've always had what I considered unacceptable siphoning when I closed the headlamp doors.
I've disscected the check valves, and they have two little rubber balls on each end which theoretically stop siphoning. However, they really only stop siphoning from the hose going to the upper headlamp washer nozzle; due to the near verticle positioning of the check valve when the headlamps are closed, the lower nozzle is always suceptable to siphoning from the hose going to the pump itself.
This lead me to the belief that the pump was allowing water to siphon to the lower water nozzle, even though the little one-way rubber disk diaphrams in my pump seemed nice and flexible.
So I changed the these diaphrams in my pump with new ones, and now the lower headlamp washer nozzles hardly leak at all when I close the headlamp doors.
So I believe (and hope) this is the key to obtaining PV-correct lack of siphoning from the headlamp washer hoses after closing of the headlamp doors.
I hope this proves useful to some.
Regards, Patrick Moresi #45581