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1970 headlight washer question

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Old 10-16-2013, 08:18 PM   #21
egon48
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Quote:
Originally Posted by Alan 71 View Post
Hi e48,
What year is your car?
I believe 69 cars had a 3 port pump for the windshield washer and a separate 2 port valve for the headlight washers was mounted to the pump with a small bracket.
Then in 70, the five port pump was used, combining both functions.
Regards,
Alan
1970 feb also has a 5 port with this trico pump by the horn relay just for the headlights,dont know if this was someones add on or orig by GM?

Last edited by egon48; 10-16-2013 at 08:21 PM.
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Old 10-16-2013, 08:36 PM   #22
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Hi e48,
That's interesting.
I wasn't aware that there was any additional hardware once the change to the 5 port pump took place. I've always though the headlight washer hoses ran directly from the pump ports to the tee just before the nozzles.
I wonder if it was added for some reason?
Regards,
Alan
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Old 10-17-2013, 10:30 AM   #23
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Originally Posted by egon48 View Post
1970 feb also has a 5 port with this trico pump by the horn relay just for the headlights,dont know if this was someones add on or orig by GM?
Probably added.

The 1970 Assembly Manual does not indicate the added pump.
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Old 10-17-2013, 10:35 AM   #24
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FYI..

1969 Assembly Manual UPC 1-D6, 1-D7, 1-D8.5 differ from 1970 Assembly Manual UPC 1-D7, 1-D10.

My 70 matches the 1970 Assembly Manual.
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Old 10-17-2013, 12:41 PM   #25
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Quote:
Originally Posted by Alan 71 View Post
Hi e48,
What year is your car?
I believe 69 cars had a 3 port pump for the windshield washer and a separate 2 port valve for the headlight washers was mounted to the pump with a small bracket.
Then in 70, the five port pump was used, combining both functions.
Regards,
Alan
My late build (Oct 24th) 69 is like you describe with the 2 port / 3 port system. My question is, if I want to disconnect my headlight washers and intentionally block the line, will it damage the pump? That thing isn't cheap to replace but the headlight washers are really of no value whatsoever except to spray most of the washer fluid all over the paint. When you think about it, there are four headlight washer nozzles and 2 for the windshield so any time you push that button, 2/3rds of your washer fluid is either coming back over your hood or going back through the rad all over your engine depending on headlight position... Might be ok if they actually did something but they are pretty well useless.

Last edited by CanadaGrant; 10-17-2013 at 01:59 PM.
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Old 10-17-2013, 02:53 PM   #26
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I would send a picture of the trico pump setup ,but i dont know how to upload picture?
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Old 10-17-2013, 04:35 PM   #27
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Quote:
Originally Posted by CanadaGrant View Post
My late build (Oct 24th) 69 is like you describe with the 2 port / 3 port system. My question is, if I want to disconnect my headlight washers and intentionally block the line, will it damage the pump? That thing isn't cheap to replace but the headlight washers are really of no value whatsoever except to spray most of the washer fluid all over the paint. When you think about it, there are four headlight washer nozzles and 2 for the windshield so any time you push that button, 2/3rds of your washer fluid is either coming back over your hood or going back through the rad all over your engine depending on headlight position... Might be ok if they actually did something but they are pretty well useless.
You will not damage the pump if you by pass the headlight washer solenoid. Disconnect the washer hose coming from the washer pump at the headlight washer solenoid and connect it direct to the washer hose that goes to the wiper arms.
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Old 10-17-2013, 05:13 PM   #28
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Quote:
Originally Posted by egon48 View Post
1970 feb also has a 5 port with this trico pump by the horn relay just for the headlights,dont know if this was someones add on or orig by GM?
Mine's Feb 19th, 1970 and I have only the 5-port.

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Old 10-18-2013, 12:50 AM   #29
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Napa makes a rebuild washer pump kit for $30 kit # 665-1745
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Old 10-18-2013, 09:50 AM   #30
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Quote:
Originally Posted by egon48 View Post
Napa makes a rebuild washer pump kit for $30 kit # 665-1745
Thanks... but that appears to be a 3 port. Is it a 5 port?

http://www.napaonline.com/Catalog/Re...Dp%3d3%26N%3d0
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Old 10-19-2013, 02:36 PM   #31
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Your right its a 3 port rebuild kit.
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