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7040 radiator leak

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captaindana View Drop Down
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Joined: 14 Sep 2009
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Post Options Post Options   Thanks (0) Thanks(0)   Quote captaindana Quote  Post ReplyReply Direct Link To This Post Topic: 7040 radiator leak
    Posted: 26 Jul 2023 at 10:44am
Should I use a stop leak or just keep adding until discbine season is over? In 5 hours it will leak a quart. I’ve certainly used it before in the 301s to get through a season. I’m just wondering if it will hurt anything thank you all. Prolly 20 more hours of mowing this season. Dana
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DrAllis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jul 2023 at 10:52am
Run with the radiator cap loose and see if the leak slows down.
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captaindana View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote captaindana Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jul 2023 at 11:28am
Ok will do thanks!
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Ky.Allis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ky.Allis Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jul 2023 at 4:23pm
Same thing happened on my 200 and I used "Bars leak" and pretty much stopped the leak so I could finish feeding cattle for the winter. Removed radiator for repair and decided to replace the 3 short hoses on the side of engine for the oil cooler while apart. Every single passage in the oil cooler was 100% blocked/clogged with that crap. Will never ever use any "stop leak" again.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote victoryallis Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jul 2023 at 4:38am
Tried pepper in my 8030 it worked fine.
8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jul 2023 at 5:56am
The engine oil cooler on the 200 is the honeycomb style (small diameter long tubes) as are the eng oil cooler and intercooler cores on 7000 series. Stop leak is just a bad idea, as things may seem just fine, but small passages get plugged reducing the effectiveness of any cooler core.    

Edited by DrAllis - 27 Jul 2023 at 6:39am
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Ed (Ont) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ed (Ont) Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jul 2023 at 6:17am
Stopleak and all that stuff is no good. The only product that I have seen that works is a product called irontite. It works and will not clog anything up. I have used it myself and we also used it in the diesel shop(Int'l dealership) that I worked in for years sold and used it. 
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Gregor View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gregor Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jul 2023 at 12:36pm
I have used a stop leak product called Dike by Conklin. It has worked well for me and never had any issues from putting that in the system.  My local NAPA store carries it.  Not supposed to plug up anything. 
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Ed (Ont) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ed (Ont) Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jul 2023 at 8:17pm
You guys think you can fix anything with a dike!! SmileSmile Just kidding Gregor. I have never seen it over here tho.  But will research it and see if available. Thanks.
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Ed (Ont) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ed (Ont) Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jul 2023 at 9:17pm
I did some checking and it is available at Walmart. But out of stock now.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MACK Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jul 2023 at 9:19pm
If these products don't stop small passages, how does it know where to stop a unwanted leak?                      MACK
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DSeries4 Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jul 2023 at 9:23pm
Run the tractor with the cap loose until your field work is done.  Then take the rad off and get it fixed.  Recommend getting it boiled out as well.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2023 at 9:11am
Originally posted by MACK MACK wrote:

If these products don't stop small passages, how does it know where to stop an unwanted leak?                      MACK

Air? I don’t know, obviously there’s a limit to the size it will block, and a limit on the small side of passages in a system where it then shouldn’t be used.

Few years back I had a recore done on my 7045, my rad was junk. After ~4 or 5 months I had a leak somewhere. Probably a solder joint but it was harvest season and I was limited in time and limited in funds not to mention more than a little ticked that after all the time and effort and money I put into a recore that it was leaking! I put Bars Leaks in it as at least a stop gap. Well, the leak went away, never came back, tractor runs cool and so does the oil.

Heard from a very reliable knowledgeable source that every car made gets Bars Leaks put in at the factory. At least at one time.

Interesting topic. As usual people’s opinions vary!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GM Guy Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2023 at 11:34pm
That is a very slow leak, I definitely wouldnt compromise the oil cooler chasing that small of a leak. cap loose, top off twice a day, sounds fine to me.
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