Losing coolant, can't find any leaks - F150online Forums



Losing coolant, can't find any leaks

Reply
 
 
  #1  
Old 08-05-2003, 07:57 PM
Member
Thread Starter
 
Join Date: Jul 2001
Location: Texas
Posts: 70
Losing coolant, can't find any leaks

Have to top off reservoir every 4 weeks. No water in oil, no water from tailpipe. No drips or other signs of external leakage. Is this normal?
Reply With Quote
  #2  
Old 08-05-2003, 09:02 PM
Senior Member
 
Join Date: May 2001
Location: Maryland
Posts: 1,080
It is not normal. You are losing coolant somewhere.

If it is not leaking on the ground i would guess that you are burning it. And i am guessing that it is a head gasket leak that isn't full blown yet, meaning you only lose coolant when the engine is running because it is sucking it in. Once the head gasket goes all the way you will see it in the oil.

You will not see any smoke or water coming out the tail pipe when losing such small amounts of coolant due to the cats.

Sometimes on rare occasions if your PCV valve and/or entire PCV system is clogged/faulty the opposite pressure can cause the engine to suck coolant.

You also might want to make sure it isn't a leaky heater core and the coolant is running out of the condensate line (Where the air cond drips on the ground)

good luck.
Reply With Quote
  #3  
Old 08-05-2003, 10:40 PM
Senior Member
 
Join Date: Feb 2003
Location: So. California
Posts: 755
If you can find a shop with a gas analyzer( smog machine ) you can see if you have exhaust gas in the radiator.
Reply With Quote
  #4  
Old 08-06-2003, 01:32 AM
BlueOvalFitter's Avatar
Senior Member
 
Join Date: Sep 2002
Location: USA
Posts: 2,406
What motor is in your truck?
Reply With Quote
  #5  
Old 08-06-2003, 03:01 AM
Senior Member
 
Join Date: Apr 2000
Location: Hollywood, CA
Posts: 1,822
Check your plug wells, it may have been leaking down into there and getting ready to foul a plug out.
Reply With Quote
  #6  
Old 08-06-2003, 09:34 AM
Senior Member
 
Join Date: Jul 2003
Location: Maine
Posts: 233
How many miles on your truck?
Reply With Quote
  #7  
Old 08-06-2003, 09:42 AM
Senior Member
 
Join Date: Jul 1999
Location: Milwaukee, Wisconsin
Posts: 466
Do you smell coolant anywhere and have you checked the floor of the passenger side, possibly a heater core leak?
Reply With Quote
  #8  
Old 08-06-2003, 09:48 AM
Senior Member
 
Join Date: Feb 2003
Location: Massachusetts
Posts: 134
Any white smoke coming from the exhaust? This could indicate a head gasket leak. Have you pulled the plugs to take a look at them? If they're extremely clean, or if you notice coolant on them, again, could be a head gasket. Take a look at the timing cover area, especially if your 97 is a 4.2L.
Post your engine and mileage. I think we could all help you much easier if you do that. Good luck!
Reply With Quote
  #9  
Old 08-15-2003, 02:20 PM
Junior Member
 
Join Date: Aug 2003
Location: Sorrento, Fl
Posts: 5
losing coolant

There were a couple of problems with the early versions of the 4.2L Ford motor. One is the head gasket leak, the other...

Mysterious Coolant Loss
The AERA Technical Committee offers the following information regarding coolant loss on 1996-2002 Ford 4.6L VIN 6, 9, W and X engines. Varied amounts of coolant loss have been reported on these engines. In some instances, no obvious external sign of the coolant has been seen.


Coolant loss may be traced to small cracks in the intake manifold coolant crossover. The coolant crossover is located below the first intake runner as shown in Figure 2.

Damaged intake manifolds should be replaced. Ford Motor Company offers eight different services consisting of new intake manifolds and all the necessary replacement items specific to individual Ford car or truck models.

Hope this gives you somewhere to look.

Art
Reply With Quote
  #10  
Old 08-15-2003, 04:54 PM
Senior Member
 
Join Date: Oct 2002
Posts: 404
Hello laneman,

It is possible that the water pump has a slow leak but the heat from the engine is burning off the coolant before you see it.
Reply With Quote
  #11  
Old 08-15-2003, 06:18 PM
Senior Member
 
Join Date: Oct 2001
Location: Norfolk, Va
Posts: 144
I didn't get what motor you have but while the truck is running check the heater hose on the passenger top rear of the motor. I had one of those that only leaked when the motor was running once, quick fix with a flathead.
Reply With Quote
 
 
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Admirablevirus
1997 - 2003 F-150
1
08-06-2015 02:10 AM
kev2126
1997 - 2003 F-150
9
07-25-2015 11:30 AM
rusty1971
1997 - 2003 F-150
18
07-09-2015 08:30 PM
scruffy
V8 Engines
4
07-07-2015 12:57 PM


Thread Tools
Search this Thread

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 Off
Pingbacks are On
Refbacks are Off



All times are GMT -4. The time now is 08:16 PM.