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Rubber Expansion Plug... are they any good?


mistapickles
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recently blew a freeze plug on my car and because I'm not interested in pulling my head to fit a new one I'm looking at one of these. The guy at AutoZone was about as helpful as pancake bunny. How long are these meant to last? What are your experiences with these?

http://i383.photobucket.com/albums/oo278/mistapickles/B74ED391-FBAC-4DCD-98EA-FBD4D19A7DA5-9543-00000BDAB54E27CD_zps224fb10b.jpg

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They won't last. You would be better off installing Brass Freeze plugs in the intire Engine. Also, if one Freeze plug is bad.....It won't be long before the rest of them are also.

 

Bill

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Why not just tap a new freeze plug in? If you can get an expansion plug in without removing the head... I'm failing to see why you can't get a proper freeze plug in?

 

You would want to be cautious what it's made out of won't cause corosion problems in the water jacket. I would also be fearful the rubber would not handle the heat well.

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Brass doesn't corrode.

 

Bill

 

So do you know the metal of the expansion plug he wants to use is brass? The two laying on my parts shelved looks like some galvanized steal.

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And just think about what they are "needed" for. It's needed if there is ever a freeze. That rubber is going to shrink allot and be brital in that type of condition making it slipping out easier. + can the rubber handle hot cold hot cold of the motor
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So do you know the metal of the expansion plug he wants to use is brass? The two laying on my parts shelved looks like some galvanized steal.

 

I suggested that the poster install a Brass Freeze Plug, Not a Rubber Expansion plug. Yes,I know what the inside and outside of a Expansion Rubber Freeze Plug is made of: A Steel washer on the water side and a galvanized washer topped with a threaded stud and nut on the outside with a rubber plug in between. I personally would use and have used a Rubber Expansion Plug in a emergency situation (Race boat). Long term??? NO. Brass Freeze Plugs are the recommended way to go.

 

Bill

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So do you know the metal of the expansion plug he wants to use is brass? The two laying on my parts shelved looks like some galvanized steal.

 

Post no. 3.

 

Bill

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Why not just tap a new freeze plug in? If you can get an expansion plug in without removing the head... I'm failing to see why you can't get a proper freeze plug in?

 

You would want to be cautious what it's made out of won't cause corosion problems in the water jacket. I would also be fearful the rubber would not handle the heat well.

it's under the exhaust manifold and from what I'm looking at it's not a tap in situation. I got the brass plug and it was tighter than a virgin on prom night... not even to mention I didn't have a clear line of site to put it in. Is 50 mm the correct size??? Anywho, I just need something to last a month or so, just started a new job and need it to get back and forth to work for a minute, my girlfriend has my other car.
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No here is the voice of reason..... Why did you blow one? By where you live I'm guessing you didn't freeze it out?

 

So the voice of reason says better check all of them, and make sure there is no headgasket issue causing ungodly presure in the coolent system.

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