Radiator Drain Plug Problem
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Junior User
Joined: Jan 2005
Posts: 56
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From: South Carolina
Radiator Drain Plug Problem
F100 300-I6 1980
Drain plug---(which is plastic) in radiator has slight leak,can not tighten anymore,anybody got any ideas on stopping this leak?The leak is not severe but annoying, Thanks for any suggestions.
Drain plug---(which is plastic) in radiator has slight leak,can not tighten anymore,anybody got any ideas on stopping this leak?The leak is not severe but annoying, Thanks for any suggestions.
Posting Guru
Joined: Jun 2006
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Does it have an o-ring? Try putting an o-ring on it, unless it's leaking from some other source, so why don't you replace it with a metal one? Just get the drain **** and match it with one at one of the Auto Parts places.
Posting Guru
Joined: Jun 2006
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Originally Posted by PICCALO358
Yes it has o-ring maybe I need to replace that ,does the drain **** just screw all the way out?
good luck
Posting Guru
Joined: Jun 1999
Posts: 1,642
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From: Northern California
If it's a plastic plug, I would simply replace it, making sure you have the o-ring as suggested by 99EXPY. what probably has occured over time, is the threads are not as "deep" which allows seepage of coolant past them. Especially, if you are only experiencing a noticeable "drip spot" as compared to a good sized leak. Just my 2 cents.
This would be a good time to replace your radiator cap with a Motorcraft cap. With an older radiator, drop your pound rating a bit. For example if you are running a 15LB.-16lb. radiaitor cap, use a 13lb. cap (Motorcraft makes an excellent cap at 13lbs. Says RS-62 in the copper part area) It costs about $8 at the Ford Parts Dept. and is worth every penny. Plus it gives your radiator a bit of relief from the extreme pressure it's under.
This would be a good time to replace your radiator cap with a Motorcraft cap. With an older radiator, drop your pound rating a bit. For example if you are running a 15LB.-16lb. radiaitor cap, use a 13lb. cap (Motorcraft makes an excellent cap at 13lbs. Says RS-62 in the copper part area) It costs about $8 at the Ford Parts Dept. and is worth every penny. Plus it gives your radiator a bit of relief from the extreme pressure it's under.
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