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TedN 
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Joined: 30 Apr 2025
Location: Central WA
Points: 377
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 Topic: 7030 Block Heater
Posted: 05 Oct 2026 at 4:24am |
I decided to put a block heater in my 7030 in case it is needed this winter. It has had a combine engine put in it so it doesn't have one now. I don't know a lot of history on the tractor so I plan to change out the coolant at the same time. The question I thought of is what are the chances of the plug coming out clean after 50 years? And then is there a good way to repair the threads in the aluminum casting? Thanks in advance.  Ted
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190XTD seriesIII, 190XTD seriesI, maroon belly 7000, 7030, 7045, D14, 190XTD series??? project(or maybe parts)
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DrAllis
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Joined: 12 Sep 2009
Points: 23574
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Posted: 05 Oct 2026 at 7:28am |
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If it was mine, I'd have the engine fully warmed up to operating temp and carefully use a 1/2" impact wrench to get it to move and know it is loose. Have your hand on the socket to control what's happening to keep it from completely coming unthreaded !!!
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 9234
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Posted: 3 hours 22 minutes ago at 9:31am |
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Heat around plug to grow the AL ?
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8070nc
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Joined: 21 Mar 2019
Location: North Carolina
Points: 926
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Posted: 1 hour 45 minutes ago at 11:08am |
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If that elbow is aluminum and you put any appreciable heat there the aluminum is so soft it will take the threads out with very little force. Id do what Doc said and with a impact wrench bump on it maybe back and forth until it moves after it does spray it with penetrant. Patience is your friend. You probably wont have any. Good luck
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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8070nc
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Joined: 21 Mar 2019
Location: North Carolina
Points: 926
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Posted: 1 hour 44 minutes ago at 11:09am |
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Trouble
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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TedN
Silver Level
Joined: 30 Apr 2025
Location: Central WA
Points: 377
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Posted: 1 hour 22 minutes ago at 11:31am |
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Thank you for the advice, I had planned to work on it this weekend but the heater won't get here until next week. Everything I work on at work that is aluminum recommends letting it cool to room temperature before trying to remove anything. I hope it comes out clean and without too much of a fight.
Ted
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190XTD seriesIII, 190XTD seriesI, maroon belly 7000, 7030, 7045, D14, 190XTD series??? project(or maybe parts)
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55allis
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Joined: 30 Jun 2020
Location: Griswold Iowa
Points: 1434
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Posted: 58 minutes ago at 11:55am |
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My local blacksmith will heat it and cool it several times before even trying to remove it.
He’d remove it at room temperature.
On manifolds I will spray penetrating oil on it several months before it needs to be removed or when we get some new to us.
That way it gets lots of heat and cooling.
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1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors 
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