I killed it!!!! :(
Mountain Pass
Joined: Feb 2002
Posts: 224
Likes: 1
From: Northern IN
Dumb question, but I am wondering why it would get sooooo hot by doing nothing more then leaving the cap off on the coolant bottle. Do they really run that hot? I know that the boiling point is lowered at atmospheric pressure, but even then, with the antifreeze in it the boiling point should be around 220 - 230 F.
I always thought that diesels run somewhat cooler then gassers, unless you are pushing them really hard. But just cruising down the road I would not have expected the engine to get that hot just by leaving the system unpressurized. We used to do this on the farm with the tractors at times if we had a leaking radiator, because they wouldn't leak if they weren't presurized. And we were working them hard without any problems.
Any thoughts on why this would cause such excessive over heating?
I always thought that diesels run somewhat cooler then gassers, unless you are pushing them really hard. But just cruising down the road I would not have expected the engine to get that hot just by leaving the system unpressurized. We used to do this on the farm with the tractors at times if we had a leaking radiator, because they wouldn't leak if they weren't presurized. And we were working them hard without any problems.
Any thoughts on why this would cause such excessive over heating?
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
Originally Posted by MDB
Dumb question, but I am wondering why it would get sooooo hot by doing nothing more then leaving the cap off on the coolant bottle. Do they really run that hot? I know that the boiling point is lowered at atmospheric pressure, but even then, with the antifreeze in it the boiling point should be around 220 - 230 F.
I always thought that diesels run somewhat cooler then gassers, unless you are pushing them really hard. But just cruising down the road I would not have expected the engine to get that hot just by leaving the system unpressurized. We used to do this on the farm with the tractors at times if we had a leaking radiator, because they wouldn't leak if they weren't presurized. And we were working them hard without any problems.
Any thoughts on why this would cause such excessive over heating?
I always thought that diesels run somewhat cooler then gassers, unless you are pushing them really hard. But just cruising down the road I would not have expected the engine to get that hot just by leaving the system unpressurized. We used to do this on the farm with the tractors at times if we had a leaking radiator, because they wouldn't leak if they weren't presurized. And we were working them hard without any problems.
Any thoughts on why this would cause such excessive over heating?
Mountain Pass
Joined: Feb 2002
Posts: 224
Likes: 1
From: Northern IN
But it doesn't all go through a 1/4" line. The coolant tank has two lines to it that are app 3/4", and the coolant continuously circulates through the tank. Leaving the cap off, is not much different then leaving the cap off of a standard radiator, except a radiator is always completely full, while the collant tank has several inches of air space above the coolant. This is because the coolant tank also functions as an overflow tank, except it is pressurized while overflow tanks aren't.
Basically, it is very similar to a hot water heating system, which is totally enclosed, but requires an expansion tank because water expands when it is heated. As long as there is some means of dealing with this expansion the system can be sealed, and no overflow tank is required. The only thing opening the system does is lower the boiling point.
Basically, it is very similar to a hot water heating system, which is totally enclosed, but requires an expansion tank because water expands when it is heated. As long as there is some means of dealing with this expansion the system can be sealed, and no overflow tank is required. The only thing opening the system does is lower the boiling point.
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