SuperB Posted February 7 Share Posted February 7 I have several leaking threaded block plugs (freeze plugs) that I'd like to replace the o-rings on. Just wondering how big of a headache it typically is to get them out? Are the block threads usually ok? I think I have the right 1/2" drive socket for them, but when I tried to remove one out of a head it won't be re-using, it wouldn't budge. I'm assuming they're right-hand threads. Hopefully I won't have to cut them out or something. Any words of wisdom would be greatly appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/75137-threaded-coolant-plugs/ Share on other sites More sharing options...
Popular Post Geoff Weeks Posted February 7 Popular Post Share Posted February 7 (edited) You didn't say what engine you are working on, but; My experience: Heating several times, trying to break free, working back and forth once it did, still ended up with a cracked casting. From then on, Drill them out progressively until just under the thread size and collapse them in. Labor intensive but safest. Edited February 7 by Geoff Weeks 4 Quote Link to comment https://www.bigmacktrucks.com/topic/75137-threaded-coolant-plugs/#findComment-568787 Share on other sites More sharing options...
SuperB Posted February 8 Author Share Posted February 8 Yeah, that's what I was afraid of. I'll plan on having to take them out in pieces. Thanks for the help BTW, it's an END711 Quote Link to comment https://www.bigmacktrucks.com/topic/75137-threaded-coolant-plugs/#findComment-568809 Share on other sites More sharing options...
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