Vacuum line

2000 PONTIAC MONTANA
212,000 MILES • 3.4L • 6 CYL • 2WD • AUTOMATIC
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TERRY LECHLITNER
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I trying to resolve a no heat but overheating issue I found a lone vacuum line coming out of the passenger side firewall about directly behind the glove box. It runs up beside the washer reservoir but then it stops. I figure there was a rubber elbow/splicer that connected it to what ever... that's my problem, I can see anywhere or another line that it would be connected to? I've tried to pull up diagrams but haven't found it yet. Anyone have any ideas? And could the actuator that controls the cold air hot air be bad cause it to overheat?
Jan 29, 2019 at 2:01 PM
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ASEMASTER6371
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Good evening,

That will not cause the overheating. That is a mechanical issue not a vacuum issue.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Can you post a picture of the line you see so I can see what you see?

Roy
Jan 29, 2019 at 3:27 PM
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TERRY LECHLITNER
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No sorry, I meant the actuator not functioning as far as overheating. As for the vacuum line goes I'm just trying to figure out where it goes to or from.
Jan 29, 2019 at 3:30 PM
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ASEMASTER6371
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The blend door actuator will not cause it to overheat as well. Before you can think it is that, the overheating needs to be repaired. Air in the system from the overheating is most likely the cause for the no heat issue.

Has anything been done for the overheat? The thermostat is the most common issue for this but needs to be checked.

https://www.2carpros.com/articles/replace-thermostat

Roy
Jan 29, 2019 at 3:34 PM
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TERRY LECHLITNER
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Thanks bro I appreciate it I change the water pump yesterday it was definitely bad. And was hoping to get lucky and the avoid taking the thermostat out but it looks like that's the route it's going to be.
Jan 29, 2019 at 3:49 PM
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ASEMASTER6371
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Yes, change it. I know it is a pain in the butt but must be done.

Roy
Jan 29, 2019 at 3:56 PM