Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Ford V6 > 3.8 & 4.2L V6
Sign in using an external account
Register Forgot Password?


Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 12-15-2010, 12:20 PM
msalvetti msalvetti is offline
Freshman User
 
Join Date: Nov 2001
Posts: 30
msalvetti is starting off with a positive reputation.
4.2L Intake Manifold Coolant Leak

There's another similar thread started by Lennyg, but I think my question is going to be different.

I have a 2001 F150, 4.2L V6, 2WD with about 130K miles. I have what seems to be a classic coolant leak, where the pipe with the 90-degree bend that introduces coolant to the intake manifold is leaking. It's about 20 degrees out, and I have no appetite for pulling everything. Instead I want to just bypass the coolant around the manifold. I've found lots of posts saying this is possible. Just disconnect the coolant inlet and outlet hoses from the manifold and connect them together.

What I haven't found is where that outlet hose it located on the manifold, and Haynes is no help. I thought I knew where it was, but after I connected what I assumed were my inlet and outlet hoses together my engine spews coolant out of that outlet fitting. It must not be the manifold outlet, but is instead connected to the main cooling circuit.

I found a photo of a new manifold:
Click the image to open in full size.

At the top right are two coolant fittings. The 90-degree is the one that's leaking. The horizontal one adjacent and pointing to the right is what I thought was the outlet. But this fitting keeps spitting out coolant. I don't see anything else though in this photo that would be another option.

Any ideas?

Thanks!

Mark Salvetti
Reply With Quote
  #2  
Old 12-22-2010, 10:39 PM
red01 red01 is offline
New User
 
Join Date: Oct 2004
Posts: 18
red01 is starting off with a positive reputation.
mine is leaking in the same place i used jb weld around the leak
the coolant through the manifold also cools the headds
Reply With Quote
  #3  
Old 12-23-2010, 09:58 PM
msalvetti msalvetti is offline
Freshman User
 
Join Date: Nov 2001
Posts: 30
msalvetti is starting off with a positive reputation.
Thanks, I realized that not long after I posted. I think the intake manifold bypass I was reading about was only for the hoses that come off the PCV valve and go up to the throttle body.

My leak was pretty bad; just tugging on the hose and the 90-degree pipe bent over. This time of year I just don't have the time (or the desire - it was 20F outside) to pull the entire intake manifold myself. Local shop couldn't look at it for 4 days, so I had the truck towed to the dealer. They fixed it in one day, but at a cost of $150 in parts and $550 in labor. Ouch.

Thanks for the reply,

Mark
Reply With Quote
  #4  
Old 11-21-2013, 11:08 AM
kermitstang86's Avatar
kermitstang86 kermitstang86 is offline
Freshman User
 
Join Date: Feb 2003
Location: Huntsville, alabama
Posts: 25
kermitstang86 is starting off with a positive reputation.
I am having that same problem now at 140k miles on my 2002. Sounds like I will be doing my own though. Is it the braced joint onto the intake or is it pipe corrosion?
Reply With Quote
  #5  
Old 11-21-2013, 11:12 AM
kermitstang86's Avatar
kermitstang86 kermitstang86 is offline
Freshman User
 
Join Date: Feb 2003
Location: Huntsville, alabama
Posts: 25
kermitstang86 is starting off with a positive reputation.
Quote:
Originally Posted by red01 View Post
mine is leaking in the same place i used jb weld around the leak
the coolant through the manifold also cools the headds
How is the leak now? Any issues?
Reply With Quote
  #6  
Old 11-21-2013, 12:09 PM
msalvetti msalvetti is offline
Freshman User
 
Join Date: Nov 2001
Posts: 30
msalvetti is starting off with a positive reputation.
Quote:
Originally Posted by kermitstang86 View Post
I am having that same problem now at 140k miles on my 2002. Sounds like I will be doing my own though. Is it the braced joint onto the intake or is it pipe corrosion?
I my case the pipe itself had corroded, and broke flush with the intake manifold. I don't think JB Weld would have helped. I think you will have to pull the manifold and drive out the old pipe, which is a press fit.

After over 15 years driving 2WD F150's, I sold the truck the month after it was fixed and bought an AWD RAV4. So nice not having to abandon the vehicle at the bottom of my hill in snowstorms (often the case with my F150's), and routinely getting 22-24 mpg, instead of 16.

Mark
Reply With Quote
Old 11-21-2013, 12:09 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Ford V6 > 3.8 & 4.2L V6

Tags
2001, 2004, 42, 42l, coolant, f0rd, f150, ford, intake, leak, leakage, mainford, manifold, maniful, problems, v6

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Upper Radiator Hose Shadowrider123 1961 - 1966 F-100 & Larger F-Series Trucks 12 04-09-2014 06:05 PM
Common Mods SSSimon Australia Chapter 15 10-21-2013 06:48 AM
Vacuum Lines eureka16 Performance & General Engine Building 0 08-24-2013 02:44 PM
How to do a quick heater core flush (with pictures) EXv10 Excursion - King of SUVs 23 07-15-2013 02:05 PM
hello from Montana 05supercrew New Member Introductions 1 04-19-2013 12:53 PM



All times are GMT -5. The time now is 11:53 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup