overheating blazer - Off-Road Forums & Discussion Groups
GM Small Trucks & SUV's All discussion of S-Class Trucks and SUV's

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 11-17-2000, 12:58 AM
**DONOTDELETE**
Guest
 
Posts: n/a
overheating blazer

Well i have a buddy with a 96 blazer 4.3
heres the prob, when he was driving to work, his heater stopped working(blowing cold air) and his engine started overheating, it would peg out and about a mile later his heat would return and his temp would go down to normal op range, and the whole cycle would repeat, now we have changed the coolent scenser, the thermostat, and flush ed the system really good... what could the problem be???

thanks
Tim

88 blazer
Like A Rock
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 11-17-2000, 08:53 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: overheating blazer

My vote is the thermostat. It sounds like it's not opening until the coolant gets too hot. Then when it finally opens, everything goes back to normal. It closes back up, and the vicious cycle starts over. If you have already changed the thermostat, has the problem gone away? One tip - drill a small (1/8") hole through the thermostat flange. That way, when you fill the system back up with coolant, any air bubbles will be able to pass through the thermostat, but it won't let a lot of coolant through and defeat its purpose. The thermostat is usually the highest point in the cooling system before it opens, and if an air bubble gets trapped under the thermostat, it has to turn to steam before the thermostat will open. By that time, the coolant will be way too hot. I pegged the temp gauge in a Turbo Laser once, and this trick has prevented this problem.

Jim Carbary

Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome