Overheats one time a day? - Blazer Forum - Chevy Blazer Forums

General Tech Help Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.

Overheats one time a day?

 
 
 
 
  #1  
Old 11-20-2006, 01:21 AM
Starting Member
Thread Starter
Join Date: Feb 2006
Posts: 115
96Ls4Dr is an unknown quantity at this point
Default Overheats one time a day?

Ok wierd but....
When it's first started up in morning it overheats within 3-4 miles but if we catch it in time(before it gets to the redline and CEL comes on) we could floor it and it goes back down in like 2 seconds. WHAT COULD IT BE???
 
  #2  
Old 11-20-2006, 01:47 AM
BF Veteran
Join Date: Jun 2006
Location: Vancouver. B.C. Canada
Posts: 3,429
Chevy Lover is a jewel in the roughChevy Lover is a jewel in the roughChevy Lover is a jewel in the rough
Default RE: Overheats one time a day?

Check the coolant level in the rad when it's cold and make sure it's full.
It's also possible that your thermostat is sticking closed.
 
  #3  
Old 11-20-2006, 10:10 AM
Junior Member
Join Date: Nov 2006
Location: Northport, Long Island, NY
Posts: 270
rooster is an unknown quantity at this point
Default RE: Overheats one time a day?

usually when u overheat, u can blame the thermostat. heres a quick check: next time it overheats stop the truck, open the hood and check two things. first if u got coolant coming out of the overflow res, then ur thermo is stuck closed. another common spot would be the water pump. the pump has a weep hole to allow the coolant to drain when the pumps bearings are worn. you will know its the pump when u see coolant flowing out like a stream from the pump. wait just got more ideas. if there is a white crusty corrosion around the pulleys and block then there is a hole in the rad and the fan is spreading the coolant around. also make sure the peacock is tight
 
  #4  
Old 11-20-2006, 10:10 AM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 40,756
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
Default RE: Overheats one time a day?

Yeah, I'd vote for a sticking thermostat.
 
  #5  
Old 11-27-2006, 11:21 PM
Join Date: Nov 2006
Location:
Posts: 6
dcup734 is an unknown quantity at this point
Default RE: Overheats one time a day?

My 98" S10 Blazer had rising temperatures since I had it passed 36K miles. Don't mess around here. Avoid an OEM replacement. I bought a replacement from Summit Racing, changed the water pump too, and haven't had any problems since. These are low budget items that can save your engine.
 
  #6  
Old 11-28-2006, 12:18 AM
Join Date: Feb 2006
Location:
Posts: 820
DetroitMuscle is an unknown quantity at this point
Default RE: Overheats one time a day?

might have air in the cooling system.
 
  #7  
Old 11-28-2006, 12:52 AM
Starting Member
Thread Starter
Join Date: Feb 2006
Posts: 115
96Ls4Dr is an unknown quantity at this point
Default RE: Overheats one time a day?

I know we have air in the cooling system cause it sounds like water bubbling when you step on the gas. How do you get the air out though?
 
  #8  
Old 11-28-2006, 01:15 AM
Junior Member
Join Date: Nov 2006
Location: Northport, Long Island, NY
Posts: 270
rooster is an unknown quantity at this point
Default RE: Overheats one time a day?

try flushing the system, and try and flush the core as well.
 
  #9  
Old 11-28-2006, 02:27 AM
Junior Member
Join Date: Jan 2006
Location: Northern VA
Posts: 378
cherryred4x4 is an unknown quantity at this point
Default RE: Overheats one time a day?

you could also have a clog in the heater core causing the bubbling, but try everything else first for the bubbling, changing the heater core isn't fun
 
  #10  
Old 11-28-2006, 11:02 AM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 40,756
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
Default RE: Overheats one time a day?

To get the air out, you first have to determine where the air is coming from. I would do a complete flush as suggested above. With the flush, replace the radiator cap AND the thermostat. Both are cheap items to CYA.

Look for any signs of leakage anywhere in the system. A faulty radiator cap can allow air into the system, but just to be safe, you need to check all other possibilities. Also, if you do not have the proper coolant level in the overflow tank, you could have air ingestion problems.
 
 
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Mikeman84
Engine & Transmission
10
02-26-2018 09:53 AM
Floridagirl_1021
1st Gen S-series (1983-1994) Tech
7
11-12-2015 12:30 PM
pbfrk4life
2nd Gen S-series (1995-2005) Tech
12
10-26-2010 06:37 AM
Blazerdazed
New Member Area
13
10-18-2010 07:58 PM
topgunfan
1st Gen S-series (1983-1994) Tech
8
06-08-2009 10:14 AM


Thread Tools
Search this Thread
Quick Reply: Overheats one time a day?


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.