Washer pump - does it need to be primed?
Thread Starter
Holley HP EFI w/TPI
Joined: May 2009
Posts: 553
Likes: 0
From: Kanata ON
The tub is full, but it appears like the pump isn't sucking it up.
Car has been sitting for awhile.
If it doesn't need to be primed, any advice on testing the pump to see if it's working and/or seeing if the signal is coming from the button?
Car has been sitting for awhile.
If it doesn't need to be primed, any advice on testing the pump to see if it's working and/or seeing if the signal is coming from the button?
Burning Brakes
Joined: Oct 2006
Posts: 1,044
Likes: 0
From: Henrico VA
I got mine to work, but it was pretty weak. The rebuild kit from zip didn't help. Does the fluid tend to leak around the piston? I would advise the OP check for leaks (have another person press the button); I would see fluid leak and then I'd swap out hoses. I would raise the intake hose and use a bottle and use gravity to force feed the pump. These techniques got me to where I am right now with my crazy '69 solenoid set up.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,850
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
I think the car is a 74 and the pump would be mounted on the motor. So if this is the case then Yes, I've had to prime them before.
Remove the middle hose off the pump and with a different hose installed, blow some water in the pump. Swap the hose back and you should be good to go as long as you can hear the pump working. You may have an air lock in there and this is a simple way to fix it.
If you can hear the pump working and you prime it with no success then you may have a bad diaphram in the pump. They do get old and crack.
Willcox
Racer
Joined: Mar 2001
Posts: 272
Likes: 3
From: Marion Ia
One other issue I have had is old hoses tend to draw air where they are connected. The siphon hose in the washer fluid tank is the one that got me. Replaced the hose and it was good to go. Something easy and fast to check with no outlay of funds.
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Thread Starter
Holley HP EFI w/TPI
Joined: May 2009
Posts: 553
Likes: 0
From: Kanata ON
I think the car is a 74 and the pump would be mounted on the motor. So if this is the case then Yes, I've had to prime them before.
Remove the middle hose off the pump and with a different hose installed, blow some water in the pump. Swap the hose back and you should be good to go as long as you can hear the pump working. You may have an air lock in there and this is a simple way to fix it.
If you can hear the pump working and you prime it with no success then you may have a bad diaphram in the pump. They do get old and crack.
Willcox
Remove the middle hose off the pump and with a different hose installed, blow some water in the pump. Swap the hose back and you should be good to go as long as you can hear the pump working. You may have an air lock in there and this is a simple way to fix it.
If you can hear the pump working and you prime it with no success then you may have a bad diaphram in the pump. They do get old and crack.
Willcox
Thanks, I will try and prime it.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Burning Brakes
Joined: Oct 2006
Posts: 1,044
Likes: 0
From: Henrico VA
I think the car is a 74 and the pump would be mounted on the motor. So if this is the case then Yes, I've had to prime them before.
Remove the middle hose off the pump and with a different hose installed, blow some water in the pump. Swap the hose back and you should be good to go as long as you can hear the pump working. You may have an air lock in there and this is a simple way to fix it.
If you can hear the pump working and you prime it with no success then you may have a bad diaphram in the pump. They do get old and crack.
Willcox
Remove the middle hose off the pump and with a different hose installed, blow some water in the pump. Swap the hose back and you should be good to go as long as you can hear the pump working. You may have an air lock in there and this is a simple way to fix it.
If you can hear the pump working and you prime it with no success then you may have a bad diaphram in the pump. They do get old and crack.
Willcox
Burning Brakes
Joined: Oct 2006
Posts: 1,044
Likes: 0
From: Henrico VA
Can you sell me anything that would help? Is the diaphragm for another year pretty close? Can I pay you to make something? I fixed the every other part of this system. I had it spraying my headlights, but it just needs more force. It is very weak on my windshield when it actually makes it up there...
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,850
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
I can take an old one apart at the office in the coming week and see if I can find something to work with it. Could be another Willcox Experiment!
Willcox
Willcox
Burning Brakes
Joined: Oct 2006
Posts: 1,044
Likes: 0
From: Henrico VA
Should this diaphragm be between the piston and the valves? If we can get some juice behind my pump, that would be pretty sweet. Keep me informed and I'll buy what I need from you.
Thread Starter
Holley HP EFI w/TPI
Joined: May 2009
Posts: 553
Likes: 0
From: Kanata ON
Put some water into the feed hose, nothing happened.
I took the top off the pump and the piston inside seems to just pulse a little while the wipers are working.
There seems to be no reaction to the washer button being pushed.
As a side note, my wipers only go one speed.
Can I apply 12v directly to the pump to see if it's working?
Is there a way I can find out if it's the switch or the wiring?
Account disabled by request 8 Feb 2010
Joined: Jan 2009
Posts: 45
Likes: 0
washer pump
I totally rebuilt my pump. If your pump is like mine there is a doubled edged piston seal that resembles a O ring and 3 check valves most likely they are worn out. The check valve assm. is easy to get but the seal isn't. I wanted to keep my pump original so I made many phone calls and finally located a manufacture that was nice enough to send me a couple of seals. The pump works like new now. By the way there is no diaphragm in the pump. If the pump is working properly it doe's not require priming.
Last edited by barbs '69 resto; Sep 27, 2009 at 10:40 PM.
Le Mans Master
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
Did you follow this thread?
http://forums.corvetteforum.com/c3-t...1972-help.html
I don't know if the '74 is the same but this thread might help.
http://forums.corvetteforum.com/c3-t...1972-help.html
I don't know if the '74 is the same but this thread might help.