Pressurized System
Thread Starter
|
Senior User
Joined: May 2007
Posts: 420
Likes: 0
From: Amsterdam, NY
Pressurized System
Well my coolant overflow tank has lots of pressure built up in it. I parked the truck last night after being run for about 15 minutes. And this morning I went to take the cap off and there was lots of pressure built up in the system. So my guess it is the intake gasket. So since I have to do the exhaust manifold. I think it would be the easiest just to rip the whole top of the engine off. pull the heads off and go form there. O by the way. We will al know whats wrong with the 4/wd tomarrow afternoon. Im dropping it off at the shop tonight and there gonna diagnose it tomarrow.
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
Then you might need a new cap on the recovery tank, but I doubt it.
It is designed to be pressurized. Don't get your undies in a bundle if it goes POOF or FOOP when you take the cap off. If you don't see evidence oil in the coolant, coolant in the oil or a lot of steam and/or smoke from your tailpipe don't worry about it.
It is designed to be pressurized. Don't get your undies in a bundle if it goes POOF or FOOP when you take the cap off. If you don't see evidence oil in the coolant, coolant in the oil or a lot of steam and/or smoke from your tailpipe don't worry about it.
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
Originally Posted by redford
There is supposed to be pressure in your coolant recovery tank. It is designed to hold 15 PSI for normal operation.
Bill
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
Originally Posted by bpounds
I've never seen the tank remain pressurized after the engine has cooled. It's supposed to be pressurized while hot.
Bill
Bill
Thread Starter
|
Senior User
Joined: May 2007
Posts: 420
Likes: 0
From: Amsterdam, NY
now that the conversation is started hahaha. When i went camping last week. I parked the truck for 2 days. was never started once. and the coolant tank was pressurized.
Trending Topics
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
Originally Posted by redford
Mine does. My coolant tank has a 15 PSI cap on it. It's supposed to hold pressure. I went out and checked it today, it was pressurized and cold. It hadn't run since I got ome from work at 2 AM this morning.
Are you guys sure it's pressure and not vacuum? Gotta be pressure though, vacuum would collapse the hoses.
Bill
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
I've checked mine several times in the last couple weeks after this discussion and it is not pressurized when cold. I don't lose any coolant either so don't think anything is wrong. I still think the caps are supposed to have a check valve so that it can pull in air as the system cools. I can't explain why others say theirs are still pressurized when cold.
Bill
Bill
New User
Joined: Mar 2003
Posts: 11
Likes: 0
From: Whitby, Ontario, CANADA
had truck tested this morning .... head gasket shot. Pressure is allowed to leak from piston into cooling system and build excessive pressure (in excess of 16 PSI) and blows past coolant cap. Under warranty still....(whew!)
