Go Back   Blazer Forum - Chevy Blazer Forums > Mechanical & Maintenance > General Tech Help > 2nd Gen S-series (1995-2005) Tech
Sign in using an external account
Register Forgot Password?
Search


Welcome to Blazer Forum!
Welcome to Blazer Forum,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Blazer Forum today!


Closed Thread
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-12-2009, 07:28 PM
 
Join Date: Jan 2009
Location:
Posts: 14
PiTRiFF is an unknown quantity at this point
Default Heat only hot while driving

My 1998 Blazer is doing something strange. While I am driving the heat is perfect but If Im idling in my driveway or parking lot the heat gets cold. I have plenty of antifreeze so Im stumped.
__________________
1998 Blazer 4WD 4 Door
164,000 Miles and running strong


Thanks
Curt
  #2  
Old 01-12-2009, 08:27 PM
Outsydr's Avatar
Senior Member
1994 Chevrolet Blazer
 
Join Date: May 2007
Location: Warren, Ohio
Posts: 591
Outsydr is an unknown quantity at this point
Default RE: Heat only hot while driving

have any of your cooling system replaced/flushed lately? if so it's possible you have air in the system put front right tire on a ramp and let it idle to cycle a few times to bleed the air out.
__________________

My Car Domain
1st gen ABS codes how-to
Henry Ford may have built the first car but GMC = God Made Chevy

  #3  
Old 01-13-2009, 09:47 AM
 
Join Date: Jan 2009
Location:
Posts: 14
PiTRiFF is an unknown quantity at this point
Default RE: Heat only hot while driving

Are you pulling my leg? I told my mechanic buddy what you mentioned to do and he laughed at me.
__________________
1998 Blazer 4WD 4 Door
164,000 Miles and running strong


Thanks
Curt
  #4  
Old 01-13-2009, 10:01 AM
rriddle3's Avatar
Administrator
2013 Cadillac ATS
 
Join Date: Dec 2006
Location: Fort Worth,Texas
Posts: 5,881
rriddle3 has a reputation beyond reputerriddle3 has a reputation beyond reputerriddle3 has a reputation beyond reputerriddle3 has a reputation beyond reputerriddle3 has a reputation beyond reputerriddle3 has a reputation beyond reputerriddle3 has a reputation beyond reputerriddle3 has a reputation beyond reputerriddle3 has a reputation beyond reputerriddle3 has a reputation beyond reputerriddle3 has a reputation beyond repute
Default RE: Heat only hot while driving

So what does your mechanic buddy say the problem is?
  #5  
Old 01-13-2009, 10:23 AM
Outsydr's Avatar
Senior Member
1994 Chevrolet Blazer
 
Join Date: May 2007
Location: Warren, Ohio
Posts: 591
Outsydr is an unknown quantity at this point
Default RE: Heat only hot while driving

If your mechanic buddy hasn't heard of that process for getting air out of a closed cooling system id be very leery of trusting him to work on my vehicle it's a very basic fundamental of newer vehicles (my daughter learned it in 10th grade auto shop class)
__________________

My Car Domain
1st gen ABS codes how-to
Henry Ford may have built the first car but GMC = God Made Chevy

  #6  
Old 01-13-2009, 12:53 PM
swartlkk's Avatar
Administrator
2009 GMC Yukon Denali
My Garage
 
Join Date: May 2005
Location: Waterloo, NY
Posts: 36,886
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Send a message via ICQ to swartlkk Send a message via AIM to swartlkk
Default RE: Heat only hot while driving

The confusion could come from the words you used Outsydr. "Have you had your cooling system replaced/flushed" seems to ask if the entire cooling system has been replaced. I am sure you meant have you replaced the coolant and flushed the cooling system.

As far as the problem, I too would recommend a flush of the heater core. While you are driving down the road, the engine RPM is higher. This can allow for more heat capacity flowing through the core and if restricted can cause a lapse in heat output while idling.
  #7  
Old 01-13-2009, 01:40 PM
Outsydr's Avatar
Senior Member
1994 Chevrolet Blazer
 
Join Date: May 2007
Location: Warren, Ohio
Posts: 591
Outsydr is an unknown quantity at this point
Default RE: Heat only hot while driving

Quote:
ORIGINAL: Outsydr

have any of your cooling system replaced/flushed lately?
What I meant was has any part of the system (ie: water pump, thermostat, radiator etc.) been replaced or flushed lately, so if my wording was confusing then my bad, I apologize for the misunderstanding.
__________________

My Car Domain
1st gen ABS codes how-to
Henry Ford may have built the first car but GMC = God Made Chevy

  #8  
Old 01-14-2009, 08:40 PM
 
Join Date: Jan 2009
Location:
Posts: 14
PiTRiFF is an unknown quantity at this point
Default RE: Heat only hot while driving

I did not mean to insult you. I tried what you said and it seems better. Please accept my sincere apology.
__________________
1998 Blazer 4WD 4 Door
164,000 Miles and running strong


Thanks
Curt
  #9  
Old 01-14-2009, 08:45 PM
New Member
 
Join Date: Dec 2008
Location:
Posts: 76
mrafindley is an unknown quantity at this point
Send a message via AIM to mrafindley
Default RE: Heat only hot while driving

Some times you have to do it a cpl times and be sure the radiator cap is off. You also could have a bad radiator cap that will not hold pressure at an idle you can have it checked at any parts house
__________________
1995 4.3 4 door 4 wheel drive White and needs a hood
1997 4.3 4 door 2 wheel drive
Old 01-14-2009, 08:45 PM
 
 
 
Closed Thread

Tags
1998, 99, blazer, car, chevy, cold, driving, heat, heater, hot, idle, idling, lose, tahoe, works


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Advertising

Featured Sponsors
Vendor Directory
Our Sponsors

All times are GMT -5. The time now is 10:39 AM.

Internet Brands, Inc.