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Washer Pump Test Data
Posted by Siegfried (more from Siegfried) on Tue, 22 Jan 2013 14:53:39
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Greetings, fellas.
In a case someone is interested (or will be) while digging into poor windscreen washing, here's what I've found right away on my bench:
- '93 washer pump with ~250 000 km on the clocks: 1.8 bar
- '87 washer pump with unknown mileage: 1.7 bar (off a parts car)
- '85 washer pump with unknown mileage: 1.2 bar (bought used)
All test were carried out on genuine VDO pumps and using pure H2O, when switched to winter washer fluids (alcohol-based) - the pressure dropped proportionally to fluid density. Haven't done any new VDO pump (or noname), but I'd expect it to be within 1.8-2.5 bar range (standard values for washer pumps).
Brand new check-valves go open at 0.3 bar, used ones (giving troubles) open at higher pressure at round 0.7-0.8 bar.
According to stats I've found, usually it's the check-valves chargeable with a weak fluid jet. It's worth replacing them every 2 years or 50 000 km (30 000 miles) whichever comes first. Original VDO washer pump goes for ~15 years. Lifespan of the pump and check-vavles goes shortened should they be run on water and go frozen (water expands when freezing into ice - and strains the enclosure).
FWIW, just sain'
Zig
posted by 188.134.4...
Posts in this Thread:
- Washer Pump Test Data, Siegfried, Tue, 22 Jan 2013 14:53:39 <-- Viewing This Message
- Clean the nozzles. Here's how:, RayF, Tue, 22 Jan 2013 15:44:48
- Re:, Siegfried, Wed, 23 Jan 2013 02:32:56
- wax, Snowmobile
, Wed, 23 Jan 2013 08:39:13
- Re:, Siegfried, Tue, 22 Jan 2013 15:05:02
- washer pump pressure tests, SaabStalker
, Tue, 22 Jan 2013 15:08:52- Re:, Siegfried, Tue, 22 Jan 2013 15:30:50
- Extreme mudder conditions., SaabStalker
, Fri, 25 Jan 2013 10:47:17 - Re: Re:, Landjet
, Tue, 22 Jan 2013 18:28:54- LOL, Siegfried, Wed, 23 Jan 2013 02:27:53
- Re: LOL, Landjet
, Sun, 27 Jan 2013 11:54:58- Re: LOL, Landjet
, Sun, 27 Jan 2013 11:57:13 - Re: LOL, Landjet
, Sun, 27 Jan 2013 11:56:17
- Re: LOL, Landjet
, Wed, 23 Jan 2013 05:48:48- Re: LOL, RS
, Thu, 24 Jan 2013 05:49:33
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