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Old 04-19-2021, 11:53 AM   #1
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Radiator Leak

I just notice my radiator leaking , its when the engine is cooling down , it doesn't leak when running, usually after 10 to 15 min when we lay camp. i been on 3000 miles so far , been putting in. liquid when needed. Have a appointment when I get back into San Antonio , my question is , why does it leak while cooling down ?


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Old 04-19-2021, 11:59 AM   #2
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Total speculation, but while cooling down:


Metal parts will be contracting so tolerances will not be as close.


Pressure cap insures that system is still under pressure.


Have you verified that it IS the radiator vs hose or connection?
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Old 04-19-2021, 12:10 PM   #3
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I have checked the hoses no sign of wet from there , looks like its coming from under the radiator bottom ( radiator shroud?) Where the radiator sits .. probably drips a cup or so everytime we stop and engine is cooling down ..
I have check at rest areas while idling and no leaks or dripping.. ill sit for 10 to 30 mins..

Temps range from 186 to 199 while driving which I keep and eye on it since discovering the leak


Quote:
Originally Posted by wolfe10 View Post
Total speculation, but while cooling down:


Metal parts will be contracting so tolerances will not be as close.


Pressure cap insures that system is still under pressure.


Have you verified that it IS the radiator vs hose or connection?
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Old 04-19-2021, 12:14 PM   #4
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Some radiators have bolted on end tanks.


On those, sometimes just retorquing the bolts/nuts can fix the leak.
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Old 04-19-2021, 12:21 PM   #5
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I will check , to see if that the issue. Will it be easy accessible? Or do I need to remove something to gain access if there is any bolts ?
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Old 04-19-2021, 12:41 PM   #6
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Sorry, no first hand experience with your coach/chassis.


A call to your chassis maker would provide you with information on your radiator's construction.
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Old 04-19-2021, 01:25 PM   #7
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Spartan had a big problem with the "Classic" coaches and their radiators. Many were replaced due to the cold engine leak under warranty. You can do a search at the top of the page and see several threads on the subject.



If you're handy, you can change out the radiator yourself and save some money but the radiators are not cheep.
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Old 04-19-2021, 02:20 PM   #8
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Thanks Dave ,

Yes i read through the posts., i was just curios as to why it would only. do that during cool down,. I am pretty handy , but limited in tools as we full time and trying to figure out the method as i read one thread that one member did it, That would save me ~ $2500 in labor as potentially quoted by Cummings not including the radiator that would need to be sent out $$$.. Might as well get the SCR recall done if needed while i am there ..as well, but i am still torn in doing it myself , but timing is not on my side as headed oversees for a month fam emergency then back to the south texas heat mid JUN July.. There goes my battery upgrade money lol.. .


QUOTE=dave&ginny;5718989]Spartan had a big problem with the "Classic" coaches and their radiators. Many were replaced due to the cold engine leak under warranty. You can do a search at the top of the page and see several threads on the subject.



If you're handy, you can change out the radiator yourself and save some money but the radiators are not cheep.[/QUOTE]
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Old 04-19-2021, 02:39 PM   #9
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Quote:
Originally Posted by ECVB View Post
Thanks Dave ,

Yes i read through the posts., i was just curios as to why it would only. do that during cool down,. I am pretty handy , but limited in tools as we full time and trying to figure out the method as i read one thread that one member did it, That would save me ~ $2500 in labor as potentially quoted by Cummings not including the radiator that would need to be sent out $$$.. Might as well get the SCR recall done if needed while i am there ..as well, but i am still torn in doing it myself , but timing is not on my side as headed oversees for a month fam emergency then back to the south texas heat mid JUN July.. There goes my battery upgrade money lol.. .


QUOTE=dave&ginny;5718989]Spartan had a big problem with the "Classic" coaches and their radiators. Many were replaced due to the cold engine leak under warranty. You can do a search at the top of the page and see several threads on the subject.



If you're handy, you can change out the radiator yourself and save some money but the radiators are not cheep.
[/QUOTE]

I feel your pain. I am about to go through this myself when I head back home. Stopping mid way at a friends place and him and I are going to change it out ourselves. The new Modine radiator from Spartan is $1100.00 plus shipping.
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Old 04-19-2021, 02:43 PM   #10
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This will state more about the Classic radiators than what most people want to know, including the seam opening as the radiator cools. Mine wouldn't show up until it was cool then pressure tested.
https://www.irv2.com/forums/f278/rad...ck-250711.html
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Old 04-19-2021, 02:45 PM   #11
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In reading more and more here on the forum , i am very tempted to do it my self ... unless i wait till i get back from my over seas trip .. to try .. i have a month or 2 before we hit the road again . i can do this at my parents house .. in the 110 degree weather lol... fun times ...

Do you have the part number ? I can probably order it now in preparation and look over the radiator


I feel your pain. I am about to go through this myself when I head back home. Stopping mid way at a friends place and him and I are going to change it out ourselves. The new Modine radiator from Spartan is $1100.00 plus shipping.[/QUOTE]
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Old 04-19-2021, 02:53 PM   #12
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thank you , reading it now .. Thanks .. This year was suppose to be an off year with no repairs lol..



Quote:
Originally Posted by brobox View Post
This will state more about the Classic radiators than what most people want to know, include the seam opening as the radiator cools. Mine wouldn't show up until it was cool then pressure tested.
https://www.irv2.com/forums/f278/rad...ck-250711.html
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Old 04-19-2021, 02:54 PM   #13
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Quote:
Originally Posted by ECVB View Post
In reading more and more here on the forum , i am very tempted to do it my self ... unless i wait till i get back from my over seas trip .. to try .. i have a month or 2 before we hit the road again . i can do this at my parents house .. in the 110 degree weather lol... fun times ...

Do you have the part number ? I can probably order it now in preparation and look over the radiator




I feel your pain. I am about to go through this myself when I head back home. Stopping mid way at a friends place and him and I are going to change it out ourselves. The new Modine radiator from Spartan is $1100.00 plus shipping.
[/QUOTE]

Spartan will want your vin number to confirm but my part number was S-2675-001A.
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Old 04-19-2021, 02:57 PM   #14
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I have a 20x60 garage you can use if you're anywhere near my area
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