boiling water


  #1  
Old 10-10-06, 10:56 AM
S
Member
Thread Starter
Join Date: Sep 2006
Location: morristown
Posts: 40
Received 0 Votes on 0 Posts
Arrow boiling water

i have a 1984 Ford Bronco II. It has a V-6. When Its cold it runs fine. But after it heats up it starts overheating and the water goes into the overflow and is boiling.
 
  #2  
Old 10-10-06, 11:03 AM
M
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 48,150
Received 404 Votes on 360 Posts
First make sure it has enough coolant [after it cools down] It might have a defective thermostat or even a bad radiator cap. The radiator may need to be cleaned or replaced. Check and make sure the fan is running, cooling off the radiator. Start with the small [cheap] stuff and work your way up.
 
  #3  
Old 10-11-06, 06:48 PM
hogfan's Avatar
Member
Join Date: Oct 2003
Posts: 352
Received 0 Votes on 0 Posts
Block test the radiator, Could be a cracked cylinder head. Have seen this. This test will check for exhaust gasses in the coolant. The heads usually crack between the valve seats. Sorry not good news!
 
  #4  
Old 10-11-06, 07:35 PM
bigfred's Avatar
Member
Join Date: Sep 2006
Location: USA
Posts: 417
Received 0 Votes on 0 Posts
In my experience an overheating engine has always been due to a faulty thermostat.

How many miles has it been since it was last changed? If it's been more than about 50,000, then I'd go ahead and replace the thermostat first because normally its a pretty easy job, and a new thermostat is less than $10. Even if that's not the problem, you'll have a new one.

Another thought: Start the engine and let it warm up with the hood up. Feel the top water hose connecting to the radiator. It will be cool initially. After the engine starts to overheat it should be hot. If not the water is not circulating back from the engine to the radiator, probably because the thermostat is stuck closed.
 
  #5  
Old 10-12-06, 03:44 PM
K
Member
Join Date: Mar 2003
Location: NW Indiana
Posts: 27
Received 0 Votes on 0 Posts
You said boiling water. Are you using the proper mixture of coolant? If your using straight water, thats normal.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description: