Pressurized System
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Joined: May 2007
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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.
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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.
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Joined: Aug 2006
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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
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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
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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.
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Hotshot
Joined: Aug 2006
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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
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Hotshot
Joined: Aug 2006
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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
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Joined: Mar 2003
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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!)
