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cooling xy 351 

 

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 Post subject: cooling xy 351
Posted: Sun Aug 23, 2009 6:08 pm 
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hi i have a xy 351 with a fg thermo fan coupled to a 60mm vs alloy radiator 160 thermostat runs well but when it is stoked a little the temp starts to climb sits around 200 what more could i do to cool it down a little thanks dave
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 Post subject: Re: cooling xy 351
Posted: Sun Aug 23, 2009 7:36 pm 
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probly not our tractor goes to 210 celseus

 

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 Post subject: Re: cooling xy 351
Posted: Sun Aug 23, 2009 8:26 pm 
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how old is ur motor though ash?

 

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 Post subject: Re: cooling xy 351
Posted: Sun Aug 23, 2009 8:49 pm 
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mitchell g wrote:
probly not our tractor goes to 210 celseus



Cant be mate. No motor will run at 200 celcius. Thats cooking piston territory.
Water under pressure in a cooling system will still boil at around 130 degrees.

 

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 Post subject: Re: cooling xy 351
Posted: Sun Aug 23, 2009 8:50 pm 
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I came across this before. Tried 3 different brand water pumps, ( 2 cast iron, 1 alloy ), to no avail, even had a 4 core Aussie Desert cooler radiator.
I checked the clearence of the impellor to the pump housing, pressed it so it was closer ( about 0.020" ), then made a round plate out of 1.0mm stainless steel, drilled holes in it at the right places, puddle welded it to the impellor fins, checked clearence to timing chain cover.
Fitted the pump, whala, fixed.
I had made the pump more positive in its displacement of the water.

 

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 Post subject: Re: cooling xy 351
Posted: Sun Aug 23, 2009 9:14 pm 
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my 351 cleveland in the xr runs just under 240 degrees farenheight on a warm day in traffic. i have a 3 core xb gt crossflow radiator and single 16" thermofan and a 15 pound radiator cap. motor has 320 rwhp and has done 7000 miles so far.
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 Post subject: Re: cooling xy 351
Posted: Sun Aug 23, 2009 10:01 pm 
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EVL098 wrote:
mitchell g wrote:
probly not our tractor goes to 210 celseus



Cant be mate. No motor will run at 200 celcius. Thats cooking piston territory.
Water under pressure in a cooling system will still boil at around 130 degrees.

it is an old frodson dexta mayby it dose run on farenhigh its anout 50 years old thow

 

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 Post subject: Re: cooling xy 351
Posted: Mon Aug 24, 2009 9:49 am 
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are you running a good quality coolent in it ??? and what do you call stoked a little......

 

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 Post subject: Re: cooling xy 351
Posted: Tue Aug 25, 2009 9:58 pm 
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HI YES IT IS 200F GOOD COOLANT STOKE IT MEANS REV IT TO ABOUT 6500 IN ALL GEARS OUT ON THE OPEN ROAD TAKES A LONG TIME TO DROP BACK TO 180F THANKS VERY MUCH FOR YOUR REPLIES DAVE
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 Post subject: Re: cooling xy 351
Posted: Thu Aug 27, 2009 12:45 pm 
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elf100capri wrote:
my 351 cleveland in the xr runs just under 240 degrees farenheight on a warm day in traffic. i have a 3 core xb gt crossflow radiator and single 16" thermofan and a 15 pound radiator cap. motor has 320 rwhp and has done 7000 miles so far.


212f is 100C....boiling point of pure water at sea level.

 

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 Post subject: Re: cooling xy 351
Posted: Thu Aug 27, 2009 5:12 pm 
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cjh wrote:
elf100capri wrote:
my 351 cleveland in the xr runs just under 240 degrees farenheight on a warm day in traffic. i have a 3 core xb gt crossflow radiator and single 16" thermofan and a 15 pound radiator cap. motor has 320 rwhp and has done 7000 miles so far.


212f is 100C....boiling point of pure water at sea level.



correct cjh but that is not under pressure either, im running a higher pressure radiator cap which helps too. raising the pressure also raises the boiling point of water.
i got the idea from nascar racing and also was used in touring cars and supercars too until they worked out more efficient ways of cooling , some of them were running 18 and 20 pound radiator caps
ill get a video of it later in the year when it warms up if u want . ive felt the top hose at this temp and there is no bubbling/boiling. i realise its not good to run at this temp all the time but my xr in traffic does get hot. it was built 12 years ago and is still going stong, never had to top the water up.
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 Post subject: Re: cooling xy 351
Posted: Thu Aug 27, 2009 6:43 pm 
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elf100capri wrote:
cjh wrote:
elf100capri wrote:
my 351 cleveland in the xr runs just under 240 degrees farenheight on a warm day in traffic. i have a 3 core xb gt crossflow radiator and single 16" thermofan and a 15 pound radiator cap. motor has 320 rwhp and has done 7000 miles so far.


212f is 100C....boiling point of pure water at sea level.



correct cjh but that is not under pressure either, im running a higher pressure radiator cap which helps too. raising the pressure also raises the boiling point of water.
i got the idea from nascar racing and also was used in touring cars and supercars too until they worked out more efficient ways of cooling , some of them were running 18 and 20 pound radiator caps
ill get a video of it later in the year when it warms up if u want . ive felt the top hose at this temp and there is no bubbling/boiling. i realise its not good to run at this temp all the time but my xr in traffic does get hot. it was built 12 years ago and is still going stong, never had to top the water up.


Well...just to be picky...the water is under 1 atmosphere of pressure..without a lid to capture the steam.
Have you ever measured the temp of the engine oil???
An EF 6cyl runs a 120kpa cap and V6 Commo's run a 135kpa cap.

 

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 Post subject: Re: cooling xy 351
Posted: Sat Aug 29, 2009 12:44 am 
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Mate
do u use a adjustable thermo fan switch if not get one and set it to come on at 80 celsuis

gassa

 

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 Post subject: Re: cooling xy 351
Posted: Fri Sep 04, 2009 11:58 pm 
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Another thing to look at is air in and out of your radiator - how well is it sealed to the metal around it? gaps will give you less efficient cooling, same goes for a shroud if you can fit one - Also, a small `spoiler' directly under the radiator can help air recycling under the rad - have a look at how VL commodes are set up, with two small spoilers, one under rad, one a bit in front of it - actually works quite well.

 

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