Heat on the highway-none around town

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Captn. Crunch
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Heat on the highway-none around town

Post by Captn. Crunch » Mon Nov 11, 2013 12:31 am

Hey
It's getting cold and my heating system which has always been flawless is letting me down. I have heat driving on the highway and nothing but cold air on the side streets. I pulled the hoses off the core and ran water through it both directions. Trimmed the ends of all the vacuum lines I could find. Loosened upper radiator hose looking for air pockets. Nothing helps. Did notice what appears to be less than impressive flow after pulling hose off the core with the engine running. Can it be the water pump failing. Van never runs hot. Always around the 200 mark
Thanks
Captn. Crunch
"I don't beat my rig-I use it to it's maximum potential"
1994 Safari conversion (sold) and miss'n it!
1999 Safari SLE AWD junked
2003 GMC Safari AWD SLT
cast iron Torsen equipped front diff
S-10 leafs-G80 rear w/3.73’s
2” body lift w/Falken Wildpeak AT’s

chesehd
I get chills without my van.
Posts: 87
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How many wheels are on an Astro van? (4): 6
Location: The "Staggering Metropolis" of Lebanon, WI

Re: Heat on the highway-none around town

Post by chesehd » Mon Nov 11, 2013 12:46 pm

My best guess is that the impeller on the water pump is wearing out which would necessitate a new water pump.

Does the heat work when you're parked and rev the engine? Does the temp climb over 200 when you do that?
Ken

2003 AWD
Back in the saddle on a new horse!

A lot of money is tainted: 'Taint yours, and 'taint mine.

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Captn. Crunch
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How many wheels are on an Astro van? (4): 4
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Re: Heat on the highway-none around town

Post by Captn. Crunch » Mon Nov 11, 2013 9:37 pm

My temp gauge has been reading normal. Temp will climb to 210 and drop 40 when thermostat opens. I get no heat whatsoever no matter how long I rev it or drive it on the back roads. Was on I -95 today and was laughing at the absurdity of it. I also suspect worn impellers that move just enough water to keep the motor cool with these cooler ambient temps. Damn it!
She's been so good for so long I really can't bitch-much
Captn. Crunch
"I don't beat my rig-I use it to it's maximum potential"
1994 Safari conversion (sold) and miss'n it!
1999 Safari SLE AWD junked
2003 GMC Safari AWD SLT
cast iron Torsen equipped front diff
S-10 leafs-G80 rear w/3.73’s
2” body lift w/Falken Wildpeak AT’s

Captn. Crunch
Site Admin
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Posts: 526
Joined: Wed Feb 01, 2012 8:10 pm
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How many wheels are on an Astro van? (4): 4
Location: southeastern ct

Re: Heat on the highway-none around town

Post by Captn. Crunch » Wed Nov 13, 2013 6:26 pm

Update.
Dropped the van off at my brothers shop, ProTek Auto in Niantic Ct. He was skeptical about needing a pump so he went right for the vacuum system. There were numerous issues-surprise surprise. With full vacuum, some lines were collapsing and others were leaking causing mixed set of issues. When on the highway and pushing on the pedal the drop in vacuum would allow the collapsed line to open enough to permit a portion of the system to quasi-function. Anyway, thanks for the thoughts and input. Posting a pic of what success looks like
PS. God bless people that have what it takes to do this crap for a living!
Attachments
image.jpg
Captn. Crunch
"I don't beat my rig-I use it to it's maximum potential"
1994 Safari conversion (sold) and miss'n it!
1999 Safari SLE AWD junked
2003 GMC Safari AWD SLT
cast iron Torsen equipped front diff
S-10 leafs-G80 rear w/3.73’s
2” body lift w/Falken Wildpeak AT’s

chesehd
I get chills without my van.
Posts: 87
Joined: Sun Feb 25, 2007 1:17 pm
How many wheels are on an Astro van? (4): 6
Location: The "Staggering Metropolis" of Lebanon, WI

Re: Heat on the highway-none around town

Post by chesehd » Sun Nov 17, 2013 3:11 am

I'm glad I was wrong. :D

Vacuum tubes are a much cheaper fix.

Roll on!
Ken

2003 AWD
Back in the saddle on a new horse!

A lot of money is tainted: 'Taint yours, and 'taint mine.

Image

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doyoulikeithere
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How many wheels are on an Astro van? (4): 4
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Re: Heat on the highway-none around town

Post by doyoulikeithere » Sun Nov 17, 2013 7:23 pm

Interesting. I never did like those vacuum powered heater controls very much.
The vans that GM built before 1990 didnt use vacuum lines in the heating controls.
They used the old push-pull cable system to work the heating until 1989.
I've had 2 1987 vans, I like those older gen 1 shorty vans the very most !
2016 Yamaha XSR900 - Silver.
2006 Kawasaki KLR 650 - Red.
1990 Astro - AWD
1987 Astro - With 5 Speed & 4wd.

Captn. Crunch
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Posts: 526
Joined: Wed Feb 01, 2012 8:10 pm
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How many wheels are on an Astro van? (4): 4
Location: southeastern ct

Re: Heat on the highway-none around town

Post by Captn. Crunch » Thu Nov 21, 2013 6:00 pm

Automotive engineers are wonderful at taking something that works just fine and improving it to the point of failure. Pretty soon they should be blessing us with a brand new vehicle where nothing works
Captn. Crunch
"I don't beat my rig-I use it to it's maximum potential"
1994 Safari conversion (sold) and miss'n it!
1999 Safari SLE AWD junked
2003 GMC Safari AWD SLT
cast iron Torsen equipped front diff
S-10 leafs-G80 rear w/3.73’s
2” body lift w/Falken Wildpeak AT’s

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