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Username Post: Rubber Freeze Plugs        (Topic#366418)
Che94 
Newbie
Posts: 12

Reg: 04-04-21
09-16-21 07:39 AM - Post#2827187    

..the ones that expand when the nut is tightened. I can not find any spec or even a suggestion on how "tight" is tight enough. 1-5/8" plug in a near 1-5/8" hole, located behind the AC compressor mounting bracket. '94, 350 engine.

Anyone got a suggestion or torque spec?

Thanks in advance...



 
someotherguy 
Senior Moderator
Posts: 29480
someotherguy
Loc: Texas
Reg: 08-01-03
09-16-21 08:27 AM - Post#2827192    
    In response to Che94

Honest advice? Don't use them. They're OK for a temporary repair but are not dependable as a permanent fix. Speaking from experience.

If you *must* use one for whatever reason, I understand, though I don't think there is any set torque figure as the size hole one might put the plug in can vary. I'd say once it feels snug and can withstand a pressure test up to 16psi or so without leaking, you're good.

Keep an eye on it once the weather turns colder as it will shrink. That's when the ones I fought with began leaking. I eventually replaced with a proper metal plug.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
Che94 
Newbie
Posts: 12

Reg: 04-04-21
09-16-21 10:30 AM - Post#2827197    
    In response to someotherguy

  • someotherguy Said:
Honest advice? Don't use them. They're OK for a temporary repair but are not dependable as a permanent fix. Speaking from experience.

If you *must* use one for whatever reason, I understand, though I don't think there is any set torque figure as the size hole one might put the plug in can vary. I'd say once it feels snug and can withstand a pressure test up to 16psi or so without leaking, you're good.

Keep an eye on it once the weather turns colder as it will shrink. That's when the ones I fought with began leaking. I eventually replaced with a proper metal plug.

Richard



Yeah, I saw plenty of negative comments about the rubber units. To the best of my memory, this is the 4th plug replaced in the old truck and I paid a mechanic to do the first 3, one of which was also rubber.

He told me he used it due to lack of accessibility (I couldn't fault him for that) but it has been in place a long time, with no issues. I was going to try a metal one but NAPA had nothing close to the size and I'm not sure what size it would take...

But I'm confident I tightened this one way beyond 15 psi limits...

Thanks...




 
Stinky 
Senior Member
Posts: 1767

Loc: Whitewater, CO
Reg: 05-25-01
09-17-21 06:48 PM - Post#2827290    
    In response to Che94

I put one in a Ford 4.6? In a Crown Civ. It was either that or pull the motor.

I really dont have any extended history on it.

I had a '76 Pu w.a swapped in 305. I had it for awhile before I saw the plug. After that, I put 10 yrs or so on it.



 
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