Running hot and heater not working - LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums

Welcome to LS1LT1.com/LS3forums.com - please click here to register...

LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums
Presented by:

New User? Register
LS1 Forums Register Photo Gallery Tech/FAQ Members List Calendar Auto Loans Search Today's Posts Mark Forums Read Auto EscrowInsurance
Premium Membership Videos Perf Tools Mobile/iPhone Link to Us! Social Groups Follow LS1LT1 on Twitter


Go Back   LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums > Engine Tech > LT1 | LT4 | L99 Engine Tech

LS1LT1.com is the premier Pontiac Forum on the internet. Registered Users do not see the above ads.
Reply
 
Share LinkBack Thread Tools
Old 09-06-2010, 06:40 PM   #1
Regular Member
 
Join Date: Aug 2010
Posts: 7
newbielt1 user's tech expertise is unknown at this point
Default Running hot and heater not working

I just bought a 95 z28 camaro with 170,000 miles. When I got it I had to replace the optispark and water pump. I have bled the lines multiple times. It is still running hot.... At idle it will get pretty close to the red then the fans will kick on And take it down to the middle mark. When driving it is usually half way between the middle mark and overheating but it can get hotter. Also when I was bleeding the lines with the heat on I noticed I was getting just Luke warm heat. I honestly don't know what to do now. Any help would be amazing! Oh and I also put in a new 180 degree thermostat.
newbielt1 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Old 09-06-2010, 07:41 PM   #2
Regular Member
 
lt1beaster's Avatar
 
Join Date: Sep 2010
Location: cut bank, mt
Posts: 493
lt1beaster user's tech expertise is unknown at this point
Default

i think it could be the radiator cap on that one not keeping pressure could make it run hotter then usual.
lt1beaster is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-06-2010, 07:57 PM   #3
Regular Member
 
Join Date: Aug 2010
Posts: 7
newbielt1 user's tech expertise is unknown at this point
Default

I thought that too so I checked it... Seems fine to me.
newbielt1 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-06-2010, 08:00 PM   #4
Regular Member
 
lt1beaster's Avatar
 
Join Date: Sep 2010
Location: cut bank, mt
Posts: 493
lt1beaster user's tech expertise is unknown at this point
Default

hmmm does it go up and suddenly drop in tempeture? if so then the thermostat could be the problem just cause its new doesn't meen its not faulty
lt1beaster is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-06-2010, 08:28 PM   #5
Regular Member
 
Join Date: Aug 2010
Posts: 7
newbielt1 user's tech expertise is unknown at this point
Default

No it rises and falls slow and steady. The thermostat I replaced only had 400 miles on it too
newbielt1 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-06-2010, 08:37 PM   #6
Regular Member
 
lt1beaster's Avatar
 
Join Date: Sep 2010
Location: cut bank, mt
Posts: 493
lt1beaster user's tech expertise is unknown at this point
Default

i guess run the fans to switches since the temp drops when the fans turn on. that way u can turn the fans on at lower temps wen u want to.
lt1beaster is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-06-2010, 08:40 PM   #7
Regular Member
 
Join Date: Aug 2010
Posts: 7
newbielt1 user's tech expertise is unknown at this point
Default

I thought about that but it stays realy hot when I'm driving at 60 mph.
newbielt1 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-06-2010, 11:47 PM   #8
Regular Member
 
lt1beaster's Avatar
 
Join Date: Sep 2010
Location: cut bank, mt
Posts: 493
lt1beaster user's tech expertise is unknown at this point
Default

theres this additive that u can put into the radiotor fluid to keep the tempeture down a few more degrees don't remeber what its called but it should be at autozone. another thing try getting a 160* thermostat that'll help out a bit
lt1beaster is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-07-2010, 02:04 AM   #9
Regular Member
 
Unknown_Z28's Avatar
 
Join Date: Apr 2009
Location: Modesto, CA
Posts: 104
Unknown_Z28 user's tech expertise is unknown at this point
Default

What about the heater core?

I've had a similar problem in the past with my '94 V6 Camaro and my '93 Ford Bronco. In the Bronco the heater wouldn't work very well at all and the engine would overheat all the time. I replaced the radiator, hoses, thermostat, switched to electric fans and basically bought a whole new cooling system. After all of that, I decided to replace the $40 heater core and BAM, the heater worked great and the truck never overheated again.

Try it!
__________________


'94 Camaro Z28 - 100K Miles - AOD - 3.23 Gears - Moroso CAI - Trick Flow Elbow - Drilled/Slotted Rotors - Flowmaster Muffler
Unknown_Z28 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-16-2010, 03:34 AM   #10
Regular Member
 
Join Date: Aug 2010
Posts: 7
newbielt1 user's tech expertise is unknown at this point
Default

So.... I am nearly in tears from happiness. I went to autozone and a heater core was 70 bucks so instead I got some radiator cleaner... Didn't do anything... The return line to the heater core was cold so I disconnected the lines and put a garden hose to them.. After some work I got the lines cleaned and it runs amazing!!! It doesn't over heat at all!
newbielt1 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-16-2010, 08:02 AM   #11
Regular Member
 
shoebox's Avatar
 
Join Date: Aug 2006
Location: Little Rock, AR
Posts: 5,976
shoebox Tradesman Level Tech II
Default

There are numerous threads about no heat and that flushing the heater core solved probably every one of them. It's a common thing on a 4th gen. So common that I have a flush procedure on my Tech Page. I would have suggested it, had I seen this thread before. At least you are happy, now.
shoebox is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-16-2010, 03:30 PM   #12
Regular Member
 
Join Date: Aug 2010
Posts: 7
newbielt1 user's tech expertise is unknown at this point
Default

Two weeks on this forum and I never found another one... Two weeks of fighting with the car and never checked to see if the heat was actually working. Fml... Haha
newbielt1 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-16-2010, 04:39 PM   #13
Regular Member
 
shoebox's Avatar
 
Join Date: Aug 2006
Location: Little Rock, AR
Posts: 5,976
shoebox Tradesman Level Tech II
Default

Quote:
Originally Posted by newbielt1 View Post
Two weeks on this forum and I never found another one... Two weeks of fighting with the car and never checked to see if the heat was actually working. Fml... Haha
That's why there is a search function. Most heater complaints come in the fall when the weather turns colder.
shoebox is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 09-17-2010, 06:39 AM   #14
Regular Member
 
Join Date: May 2007
Location: Good Ole Wv
Posts: 5,184
2fast4u88 Apprentice Level Tech II
Default

Sounds like the heater core is stopped up. Then again running hot sounds like you didn't open the bleeders. Where the heater core has a air pocket in it.
__________________

1995 T/A M6: -Tops,390 Eagle Forged Fully Built Stroker,Procharged at 12lb'z(Currently Down)
1995 T/A M6:Hard Top, Stock cube, cc502 w/1.6's, Ls7 Lifters, Summit Pushrods/Guide Plates, 10.734:1, P&P Heads, Arp H/B's, P&p Intake, 30lber's, No Emissions, Flowmaster Catback, K&N Intake, Longtubes & Ory, Pro 5.0, 3pt connectors, Lowered 1.5in, 2.5 Cowl hood, ws6 wheels & Tune by Solomon
2fast4u88 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply

Bookmarks

Thread Tools

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


» Recommended
Find technical articles on a Chevy Corvette, including tips and tricks on a Chevy Camaro and expert advice for Pontiac Firebird, along with reviews on the Cadillac CTS.
» Auto Insurance
» Sponsors
Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 07:36 PM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.5.2
Copyright © 2005 - 2011 by LS1LT1.com

Our Friends:


Illegal Street Racing | Super Cars | LT1 Tech Articles