Safari / Astro Water Pump Hoses Question

"Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura) 03/21/2018 at 08:13 • Filed to: None

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1997 GMC Safari (Chevy Astro) with 4.3L V6. The water pump has four hose connections: upper and lower radiator hose, “bypass hose,” and mystery hose . What the two small-diameter hoses called that connect to the water pump on the 4.3L engine?

pip bip - choose Corrour > Rusty Vandura - www.tinyurl.com/keepoppo 03/21/2018 at 08:24

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maybe it goes to the heater tap?

can you get a pic from the GM dealer?

Spanfeller is a twat > Rusty Vandura - www.tinyurl.com/keepoppo 03/21/2018 at 08:58

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Purge?

I don’t know... Really. I’m just amazed they made such a large 6 cylinder engine.

I hope your troubles go away and that the wrencher oppos hand you an answer!

Rusty Vandura - www.tinyurl.com/keepoppo > Spanfeller is a twat 03/21/2018 at 09:09

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I think they’re all still in bed.

Urambo Tauro > Rusty Vandura - www.tinyurl.com/keepoppo 03/21/2018 at 10:30

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Hard to say without looking at it. Could it be a return line from the heater core?

His Stigness > Rusty Vandura - www.tinyurl.com/keepoppo 03/21/2018 at 11:17

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The bypass hose is the thermostat bypass hose. When the thermostat is closed the water needs somewhere to go. The bypass hose is generally small and cheap and should always be replaced.

Rusty Vandura - www.tinyurl.com/keepoppo > Urambo Tauro 03/21/2018 at 12:31

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Exactly what it turns out to be. Rubber hose at each end with a rigid section in the middle. Attaches with hose clamps.

Rusty Vandura - www.tinyurl.com/keepoppo > His Stigness 03/21/2018 at 12:33

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And so it shall be, with a OE hose from the dealer, as it happens. The other is the return from the heater core, as it turns out.

His Stigness > Rusty Vandura - www.tinyurl.com/keepoppo 03/21/2018 at 13:37

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Ah yes there is usually one of those too.