Question about rad hoses/cooling system.
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New User
Joined: Aug 2009
Posts: 9
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From: Comox Valley
Question about rad hoses/cooling system.
Hey Guys gotta a real quick question. My 6.9, after it has been running good and is all warmed up the upper rad hose get's nice and hot, normal burning hot, but my bottom hose stays real cool, it warms up slightly but barely noticable. SO i'm wondering what's up, the cooling systems on these trucks that good? It doens't overheat or anything.
Mainly want to make sure thermostat isn't broken or anyhting in that department ie. rad and stuff. Had a 91 RAnger a couple months ago, thermostat stuck shut, I may have drove it around a little too much, but needless to say, had to change the head gaskets
wasn't a fun job.
Anyways guys thanks in advance,
.
Mainly want to make sure thermostat isn't broken or anyhting in that department ie. rad and stuff. Had a 91 RAnger a couple months ago, thermostat stuck shut, I may have drove it around a little too much, but needless to say, had to change the head gaskets
wasn't a fun job.Anyways guys thanks in advance,
.
Tuned
Joined: Oct 2003
Posts: 331
Likes: 18
From: Pottstown, PA
What does your temperature gauge read? If it reads within range I would not worry about it.
Top of radiator will be hot, heat rises... Bottom cool. Sounds like the radiator is doing its job. Model T's and my Allis Chalmers G tractor have no water pump, thermosiphon system. Thermosiphon circulates based on natural convection which circulates liquid without the necessity of a mechanical pump.
From Wikipedia "Convective movement of the liquid starts when liquid in the loop is heated, causing it to expand and become less dense, and thus more buoyant than the cooler water in the bottom of the loop. Convection moves heated liquid upwards in the system as it is simultaneously replaced by cooler liquid returning by gravity. Ideally, the liquid flows easily because a good thermosiphon should have very little hydraulic resistance." Your truck is not thermoshiphon because of the pump, but same type of water movement in system with pump.
Yes, the cooling systems on trucks are that good.. They need to be. Internal combustion engines are heat pumps. (I used to think that internal combustion engines ran on the explosion of gas or diesel.. Really ts the heat from the explosion expanding that pushes the piston...) Trucks under a load need to dissipate a lot of heat in order to maintain the proper cylinder temperature, therefor big radiators. Too hot, no temperature difference, no expansion of gasses...
Sorry for droning...
Top of radiator will be hot, heat rises... Bottom cool. Sounds like the radiator is doing its job. Model T's and my Allis Chalmers G tractor have no water pump, thermosiphon system. Thermosiphon circulates based on natural convection which circulates liquid without the necessity of a mechanical pump.
From Wikipedia "Convective movement of the liquid starts when liquid in the loop is heated, causing it to expand and become less dense, and thus more buoyant than the cooler water in the bottom of the loop. Convection moves heated liquid upwards in the system as it is simultaneously replaced by cooler liquid returning by gravity. Ideally, the liquid flows easily because a good thermosiphon should have very little hydraulic resistance." Your truck is not thermoshiphon because of the pump, but same type of water movement in system with pump.
Yes, the cooling systems on trucks are that good.. They need to be. Internal combustion engines are heat pumps. (I used to think that internal combustion engines ran on the explosion of gas or diesel.. Really ts the heat from the explosion expanding that pushes the piston...) Trucks under a load need to dissipate a lot of heat in order to maintain the proper cylinder temperature, therefor big radiators. Too hot, no temperature difference, no expansion of gasses...
Sorry for droning...
Thread Starter
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New User
Joined: Aug 2009
Posts: 9
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From: Comox Valley
I appreciate it man, just wondering, my gauge usally reads around just the N, sometime higher not usally, even when i'm 4x4ing a little. Only reason i ask is my old RAnger usally stayed the same, except onced you started making it work, it really started to heat up. But i'm gald these things are that good lol. Thanks again man, hate to not ask then poof, white smoke and an oh **** lol.
