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Disc freeze plugs
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johnfin
Posted 2019-09-30 7:44 PM (#588202)
Subject: Disc freeze plugs


Regular

Posts: 95
252525
Do they make them out of brass and will they retain tension as well as steel? Also what is a perfect install method to prevent from mashing them.



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Mopar1
Posted 2019-09-30 8:53 PM (#588205 - in reply to #588202)
Subject: Re: Disc freeze plugs



Expert

Posts: 2736
200050010010025
Location: N.W. Fla.
2 ball peen hammers, round end on the plug, hit with the other.
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57chizler
Posted 2019-10-01 5:42 PM (#588265 - in reply to #588205)
Subject: Re: Disc freeze plugs



Expert

Posts: 3264
200010001001002525
Location: NorCal
While dinging the center of a Welch plug is the common way to install them, it isn't correct. When properly installed, the plug will be flat across without a center ding.

http://www.spriteparts.com.au/tech/welch.html
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johnfin
Posted 2019-10-01 6:39 PM (#588270 - in reply to #588202)
Subject: RE: Disc freeze plugs


Regular

Posts: 95
252525
Great, now where do I buy the 1.625 brass welsh plugs?
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57chizler
Posted 2019-10-02 3:05 PM (#588322 - in reply to #588270)
Subject: RE: Disc freeze plugs



Expert

Posts: 3264
200010001001002525
Location: NorCal
https://www.hubbardspring.com/product/expansion-plugs-brass/
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NicksGarage
Posted 2019-10-08 5:14 PM (#588585 - in reply to #588202)
Subject: RE: Disc freeze plugs



Extreme Veteran

Posts: 553
5002525
Location: Ramona, CA
I've been going through this same issue with my 300F as a plug fell out behind the motor mount. All the vendors show cup style freeze plugs which won't work. I contacted Melling because they had shallow cup plugs and I hadn't seen those before but those aren't right either. I ended up getting the correct size brass ones for them for both the block and the heads. I ended up using a rubber temporary plug in there for now as you can't get a straight shot at it with the engine in the car, even with the motor mount removed.

The Melling numbers are MEP-12B for the 1 3/8" ones for the heads and MEP-14B for the 1 5/8" ones for the block.

Here is an album of pictures and you will see a picture of old plugs in another block, you can see a ridge in them and how flat they are. I don't know how to reproduce that. I also tried a Dorman copper screw in plug but that didn't work and found out that their new ones aren't very good.


https://photos.app.goo.gl/cvt3DR9HTSU62cvd7

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brand209
Posted 2019-10-16 7:11 PM (#588920 - in reply to #588202)
Subject: Re: Disc freeze plugs


Veteran

Posts: 103
100
To install these I find the proper sized socket that fits the diameter and tap the socket in with a hammer, keeps the freeze plugs from getting damaged and has a solid contact all the way around
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