Overflow Cap Blowing Off - Ranger-Forums - The Ultimate Ford Ranger Resource

General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

LinkBack Thread Tools Search this Thread
Old 06-01-2009
Thread Starter
Join Date: Jun 2009
Location: hillsborough
Posts: 2
Icon5 Overflow Cap Blowing Off

I have an 87 2.9L V6 4x4 I just bought a month ago. New radiator, new hoses, new therm, new radiator cap (all these I can see) and I was told new head gasket. The problem I am having is radiator fluid is being forced out underneath my radiator cap and/or my overflow tank (Not OEM) cap blows off. I am having to add coolant and water every few days but other than the caps, do not see any other leaks. My temp gauge does not work properly and my heater core needs replacing so I know this might not be an easy solve. The fluid color in the overflow tank is a little brown, and there is a little residue on the radiator cap. I have flushed the radiator... any help would be greatly appreciated.
Reply With Quote
Old 06-02-2009
Join Date: Mar 2007
Location: Upstate,NY
Posts: 2,598
You're not going to like this , but, you have the classic symptom of a blown head gasket or a cracked head.Gases from the combustion chamber are leaking into the cooling system and causing it to build up too much pressure.
You need to do a cylinder leakdown test on each cylinder with the radiator cap off to see if it is on one head or both.
You may,MAY, get lucky and just retorque the heads as the person who supposedly did the head gasket may not have done it properly.
But that's no guarranty.
Reply With Quote
Old 06-02-2009
Thread Starter
Join Date: Jun 2009
Location: hillsborough
Posts: 2
Thanks so much for your reply, I kind of had a bad feeling that was the case.
Thanks again
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
coolant on top of overflow tank iplayloudly General Ford Ranger Discussion 2 07-27-2012 01:05 PM
coolant bubbling in overflow resevior UnderdogGN General Ford Ranger Discussion 24 09-09-2011 07:07 AM
Overflow tank boils over after truck is parked, temperature reads normal xzaviergomez General Technical & Electrical 6 06-25-2011 11:59 AM
oil blowing out oil cap saints208 SOHC - 2.3L & 2.5L Lima Engines 0 05-20-2010 10:02 PM
Coolant overflow.. BSGRanger General Technical & Electrical 3 04-18-2009 12:50 PM

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -6. The time now is 10:48 AM.

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.