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Old 06-29-2011, 03:06 PM   #1
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Join Date: Mar 2009
Location: OKC Area
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Car: 90 Camaro Iroc-z
Engine: 350 TPI
Transmission: 700R4
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Freeze Plug

How hard is it change the freeze plug in a 90 Iroc 5.7? I have anitfreeze coming from the back of the motor. Thanks guys
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Old 06-29-2011, 03:41 PM   #2
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Re: Freeze Plug

Super easy; just drive a screwdriver or punch into it, pry it out, and whap a new one in with a big socket or something. Sand around its edge to remove the plating where it is against the casting; use some kind of HARDENING sealer (I like the purple Permatex stuff), NOT silicone, all teh way around it; drive the plug just under flush, maybe .030" - .050" or so; and smear the sealer that the hole scrapes off of the plug around the edge of the plug to positively seal it.

Piece of cake. Shouldn't take but a minute or 2.
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Numquam ponenda est pluralitas sine necessitate.
William of Ockham, c. 1330 AD, from Quaestiones et decisiones in quattuor libros Sententiarum Petri Lombardi

Roughly paraphrased into modern English, and applied to figuring out what's wrong with your car:

The simplest explanation that fits all the facts is probably the right one.
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Old 06-29-2011, 04:53 PM   #3
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Location: Calgary, AB, Canada
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Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
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Re: Freeze Plug

...if the engine was on a stand. While it's in the car, I foresee the access being so restricted that I wouldn't be very happy doing it...
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Old 06-29-2011, 05:07 PM   #4
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Re: Freeze Plug

Nah, not a problem...

Once the engine is out, or the transmission out, whichever is easier for the particular plug, the car won't pose much of an obstacle.

I would strongly suggest though, that if one has rusted through, the others, which have been subjected to the exact same conditions for the exact same length of time, will probably be in for all practicalpurposes the exact same state. Might as well do em all while you've got the motor out. Save yourself from having to pull it again next weekend to do the next one that happens to fail.
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Numquam ponenda est pluralitas sine necessitate.
William of Ockham, c. 1330 AD, from Quaestiones et decisiones in quattuor libros Sententiarum Petri Lombardi

Roughly paraphrased into modern English, and applied to figuring out what's wrong with your car:

The simplest explanation that fits all the facts is probably the right one.
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Old 06-29-2011, 05:32 PM   #5
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Posts: 71
Car: 90 Camaro Iroc-z
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23

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Re: Freeze Plug

That's was my next question...the motor I and tranny are still in the car...how hard would it be to get to them. Sounds like a pain in the ***.
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Old 06-29-2011, 11:00 PM   #6
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Axle/Gears: 10 bolt, true-trac, 3.73

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Re: Freeze Plug

Ya, the plugs are super easy, pulling the engine kinda sucks... Good luck with that
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Old 06-29-2011, 11:00 PM
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