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Author Topic: Frozen Thermostat bolt  (Read 877 times)

George Lollar

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  • USA, VA, Fairfax Station
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Frozen Thermostat bolt
« on: June 20, 2023, 18:12:52 »
I need to remove thermostat cover and bolt over head is frozen.  Tried penetrants and shock, heat is next, but that has complications.  To heat I need to remove injection lines and heat may impact head gasket.  Does anyone have any suggestions or magic?
George Lollar
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George Lollar

1970 280SL Green/White
1994 E320 Coupe

BobH

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  • United Kingdom, England, MALDON
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Re: Frozen Thermostat bolt
« Reply #1 on: June 20, 2023, 18:39:54 »
Hello George, if you search for "thermostat replacement", there are lots of posts, seems like it can be a pain to remove the cover, i found this one with some good tips

https://www.sl113.org/forums/index.php?topic=30683.msg223178#msg223178
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February 1965 230SL Automatic
UK delivered RHD
Papyrus white, blue hard top & hub caps
Blue soft top
Blue leather

George Lollar

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  • USA, VA, Fairfax Station
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Re: Frozen Thermostat bolt
« Reply #2 on: June 21, 2023, 21:15:25 »
Bob -  Thanks for the suggestion. George
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George Lollar

1970 280SL Green/White
1994 E320 Coupe
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