Radiator Fill Plug - Defender Source
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  #1  
Old September 26th, 2016, 09:16 AM
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Radiator Fill Plug

I was checking the fluid levels etc in prep for MAR. Found the threads on my radiator fill plug to be deteriorating. I had another plastic plug but it did not match. My current plug is what seems to be fine thread. All I can find are the more "course thread" brass and plastic replacement plugs. post 1989.


Assuming this one is stock, its from a 3.5 V8. but now has a 3.9 (94 NAS) engine.


Question.. Was there a different one for earlier v8?


Pic installed, radiator is hot now so cant pull it yet for pic of threads.
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  #2  
Old September 26th, 2016, 09:43 AM
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they made them in brass and plastic. The plastic doesn't age well. I like the brass.
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Old September 26th, 2016, 10:10 AM
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There is only one size. Get the brass. Run a plumber's round pipe wire brush in the threads to clear the gunk.


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Old September 26th, 2016, 10:27 AM
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I will pull it back out tonight and clean out threads in radiator and try the new spare plastic one I have. If it ends up screwing in properly i will go brass in the long run.
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Old September 26th, 2016, 11:05 AM
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Originally Posted by speedpin View Post
I will pull it back out tonight and clean out threads in radiator and try the new spare plastic one I have. If it ends up screwing in properly i will go brass in the long run.

I should have a brass spare one somewhere. If the new plastic one still doesn't fit, let me know and I can stop by tomorrow.
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Old September 26th, 2016, 11:17 AM
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Thanks Max, will shoot you a text
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