The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-06-2016, 12:11 AM   #1
shortcake
Registered User
 
Join Date: Dec 2016
Location: Belton Mo
Posts: 4
'71 Chevy C10 with no heat

My husband has a '71 C10 with no heat. He changed the radiator (it leaked) - changed the thermostat, heater core, water pump, flushed it - everything he could think of......heater still won't work. Is there anything he might not be thinking of to check?
shortcake is offline   Reply With Quote
Old 12-06-2016, 12:14 AM   #2
JnJJunk
Registered User
 
Join Date: Nov 2016
Location: Batavia, Illinois
Posts: 18
Re: '71 Chevy C10 with no heat

Is the heat not working or the fans?
JnJJunk is offline   Reply With Quote
Old 12-06-2016, 01:18 AM   #3
shortcake
Registered User
 
Join Date: Dec 2016
Location: Belton Mo
Posts: 4
Re: '71 Chevy C10 with no heat

The fans work
shortcake is offline   Reply With Quote
Old 12-06-2016, 01:24 AM   #4
LongBox
Registered User
 
Join Date: Sep 2016
Location: Vancouver BC
Posts: 784
Re: '71 Chevy C10 with no heat

An air lock is often the problem when the heater fails to produce heat. It is necessary to "burp" the cooling system to get the last of the air out of it.
__________________
Rick

-69 GMC 910 Long Box, 350
-98 Chev Silverado 1500, 350 Vortec 4L60e
-08 Mustang GT Convertible
LongBox is offline   Reply With Quote
Old 12-06-2016, 10:52 AM   #5
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
Re: '71 Chevy C10 with no heat

Quote:
Originally Posted by shortcake View Post
My husband has a '71 C10 with no heat. He changed the radiator (it leaked) - changed the thermostat, heater core, water pump, flushed it - everything he could think of......heater still won't work. Is there anything he might not be thinking of to check?
Maybe heater hoses hooked up wrong.
Post a pic of the engine bay.
geezer#99 is online now   Reply With Quote
Old 12-06-2016, 11:37 AM   #6
tk1251k
Registered User
 
tk1251k's Avatar
 
Join Date: Nov 2005
Location: Newton
Posts: 174
Re: '71 Chevy C10 with no heat

Heat exchange valve possibly not opening. Located on the passenger fender on my 72.
tk1251k is offline   Reply With Quote
Old 12-06-2016, 02:18 PM   #7
cdowns
Senior Member
 
cdowns's Avatar
 
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
Re: '71 Chevy C10 with no heat

the cavity behind the fan is clogged up with 45years off crap nnot allowing air to maove// remove the fan and clean out to allow airflow
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane

MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF

DONT BELIEVE EVERYTHING YOU THINK

TAKE MY ADVISE;I DON'T USE IT ANYWAY
cdowns is offline   Reply With Quote
Old 12-06-2016, 02:19 PM   #8
specialtyretail
So,, what else you got???
 
specialtyretail's Avatar
 
Join Date: May 2010
Location: Jackson, Mo
Posts: 18,634
Re: '71 Chevy C10 with no heat

Yep,, probably full of mice nests...
__________________
Our paypal is specialtyretail@yahoo.com Please DO NOTsend paypal funds as a gift, right is right. Thanks....
Sorry, we CANNOT ship larger parts. Thanks.
specialtyretail is offline   Reply With Quote
Old 12-06-2016, 02:36 PM   #9
68is4me
Registered User
 
68is4me's Avatar
 
Join Date: Jun 2014
Location: lakefield,mn
Posts: 566
Re: '71 Chevy C10 with no heat

If the heater core was replaced the collection of a mouse nest should have been found. Don't these have a hot air flapper door? Maybe the door, cable, or control is broken not allowing the hot air flapper to open.
__________________
68 c10 swb stepper
68 c10 swb stepper
67 c10 lwb
06 gmc duramax
68is4me is offline   Reply With Quote
Old 12-06-2016, 10:08 PM   #10
shortcake
Registered User
 
Join Date: Dec 2016
Location: Belton Mo
Posts: 4
Re: '71 Chevy C10 with no heat

Thanks for all your replies - it turned out to be the only hose he didn't check. No mouse nests.....it's driven everyday (almost) no chance for any nest to be built.
shortcake is offline   Reply With Quote
Old 12-07-2016, 03:29 PM   #11
Already Gone
70+ ( Old Skool Club )
 
Already Gone's Avatar
 
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,143
Re: '71 Chevy C10 with no heat

Quote:
Originally Posted by shortcake View Post
Thanks for all your replies - it turned out to be the only hose he didn't check. No mouse nests.....it's driven everyday (almost) no chance for any nest to be built.
Welcome here and we love to see pictures of the truck !!
__________________
1972 C10 Custom/Deluxe 613 Highlander 406/700R4
1999 White Tahoe LS 4x2 with Z56 Police Package
1992 K1500 GMC Suburban

Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601

" Circumsatances Do Not Change Responsibility "

" The Sky is not the Limit, Your Mind is." Marilyn Monroe ..


RIP Charlie Watts 1941 - 2021
Already Gone is offline   Reply With Quote
Old 12-08-2016, 02:04 AM   #12
shortcake
Registered User
 
Join Date: Dec 2016
Location: Belton Mo
Posts: 4
Re: '71 Chevy C10 with no heat

I'll post some first chance I get. Hopefully soon
shortcake is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:10 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com