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04-19-2002, 07:39 AM
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#1 |
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Registered User
Join Date: Nov 2001
Location: Fairmont WV
Posts: 304
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Heater wont close off
I have a '71 c10. The heater don't want to shut off. When on the highway it gets pretty hot in the cab.
Is there a seal that needs replaced or should I just put a shutoff valve on the heater core? ------------------ Rod Childers '71 C10 Stepside
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Rod Childers '71 C10 Stepside |
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04-19-2002, 07:43 AM
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#2 |
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CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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Napa sells a nice manual valve that fits in the heater hose. I have always used them because most factory valves with any age to them will not shut off 100%.
------------------ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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04-19-2002, 02:58 PM
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#3 |
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Registered User
Join Date: Apr 2000
Location: Carmichael, Ca
Posts: 67
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There is a heater valve on the inner fender, passenger side. One of the water heater hose connects to this before continueing on to the heater core. This #$%@ thing is expensive for what you get, $30.00. This valve becomes corroted by water. I have to replace mine every two years.
------------------ 72 Cheyenne Super, Fleetside, Shortbed, Original Owner, Special Ordered Northern Calif
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72 Cheyenne Super, Fleetside, Shortbed, Original Owner, Special Ordered 350ci/340hp, Auto Trans, 3:70 Posi, Tow Package Northern Calif |
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04-19-2002, 07:58 PM
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#4 |
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Registered User
Join Date: Nov 2001
Location: Fairmont WV
Posts: 304
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I just checked my chasis manual, seems like only the models with ac have a shutoff for the core. I was hoping that there was a vent/damper not sealing properly.
------------------ Rod Childers '71 C10 Stepside
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Rod Childers '71 C10 Stepside |
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04-19-2002, 08:09 PM
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#5 |
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Senior Member
 
Join Date: Dec 1999
Location: Darrington, Washington
Posts: 3,963
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I had a truck that always pushed hot air out the vents,always stayed on blowing a little,my quick fix was unplug wire in summer,hook back when cold.Sounds like your flapper door might not be shutting all the way,maybe a cable adjustment?
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04-19-2002, 08:33 PM
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#6 |
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Registered User
Join Date: May 2001
Location: rienzi,ms.usa
Posts: 75
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you can buy those heater valves in a hard type plastic and i have had on on my car now for about 7 yrs now....still looks the same and no problems since i replaced it...i just went to auto parts house and asked to see an asortment of heater valves and picked the one i liked...just my 2 cents.......jv
------------------ 1972 swb, 400 sbc, 1978 malibu classic,305 balanced and bluprinted flowmasters,2 1/2 exhaust,pulleys,k/n 4" power filter,750 edelbrock carb,plus lots more......
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1972 swb, 400 sbc, 1978 malibu classic,305 balanced and bluprinted flowmasters,2 1/2 exhaust,pulleys,k/n 4" power filter,750 edelbrock carb,plus lots more...... RIENZI,MS ...just southeast of Memphis... |
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04-19-2002, 08:59 PM
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#7 |
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Registered User
Join Date: Jul 2000
Location: horn lake,ms
Posts: 388
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i just bypass the heater core in the summer, i'm too cheap i guess!! LOL
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1976 Crew Cab Dually (under construction) 1972 Suburban 1955 Pro Street Chevy 1985 S-10 Blazer (daily driver) V W Sandrail Located in Horn Lake, MS that's just 4 miles south of Memphis TN www.classictruckshop.com/clubs/earlyburbs/members/gallery2/223/display.htm Former engine builder for Racing Head Service Performance Engines in Memphis TN. over 1,600 plus engines built by little ole me!! GOD BLESS THE BRAVEST OF THE BRAVE...THE NEW YORK CITY FIRE FIGHTERS!! |
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04-19-2002, 10:35 PM
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#8 |
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Senior Member
 Join Date: Mar 2001
Location: Cedar Park, TX
Posts: 686
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Well, make sure the cable that passes thru
that little plastic plug/cap from the inside of the cab (under the glovebox area) is still connected to the flapper door that is suppose to seal the air off from the heater core. If the truck has been parked under leaves and crap...it gets in there and actually can keep that door/flapper from closing all the way. I just rebuilt my heater core box/assm and was amazed by how much junk can get in there. its really hard to clean out good without taking the box off the truck. I really need to get a digital camera...I would upload some pics of it. I had all the inside metal pieces powdercoated...and it looks super nice now. Gonna have to wait at least another year to add a/c..:-( What started out as a simple motor change has turned into a frame off full blown resto! Goodluck. If you do decide to by-pass the heater core in the summer, be sure and run a garden hose of water thru it....just to flush it out, will extend the life of it! ------------------ 71 Chevy C-10 SWB Fleetside WAS:307w/3-on-the-tree NOW:350TBI/700R4/3.73 See it at www.prismnet.com/~grzanich
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71 Chevy C-10 SWB Fleetside RamJet-350/4L60e & Compushift/3.73Posi See it at www.prismnet.com/~grzanich |
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