Keeps popping freeze plugs on the dyno... - Page 3 - Vintage Mustang Forums
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post #31 of 35 (permalink) Old 08-12-2019, 04:15 PM
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Originally Posted by jdub View Post
"I spent $1000 having the freeze plugs of an engine I bought from you six years ago for $1300 replaced because three of them fell out on the dyno?" How exactly do you think that conversation will go? I just don't see a good ending that is worth my time. Do you know him personally?

I have actually not read one other good thing about them on the internet other than what you wrote.
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post #32 of 35 (permalink) Old 08-12-2019, 06:45 PM
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Is this why the Boss had screw-in plugs, was it actually just water pump and normal heat pressure?
History of your block? Maybe it just has very excessive corrosion around the holes. I used some type III on mine but I really don't think it has much strength to it. I do know that some core plugs have noticeably deeper lips than others that ensure they are more square. One more and I'd be reaching for the JB Weld for every one.
The Boss engines has screw in plugs because they supposedly strengthened the block.

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post #33 of 35 (permalink) Old Today, 02:55 PM
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The only time I've had a freeze plug pop was after letting a machine shop install them (conveniently the same shop that screwed up my 428).

I've always used either Permatex #2 or Shellac to install them, never had one pop since.

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post #34 of 35 (permalink) Old Today, 05:32 PM Thread Starter
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Yep. This is why I'm never, ever, ever paying another ******* to do engine assembly for me. Even if they get it right 99% of the time it's not good enough if I end up being the 1%. Plus locals are all sketchy and nobody in their right mind wants to do mail order engine warranty work. Paying someone else is lose-lose-lose in my experience.

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post #35 of 35 (permalink) Old Today, 07:16 PM
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Originally Posted by jdub View Post
Yep. This is why I'm never, ever, ever paying another ******* to do engine assembly for me. Even if they get it right 99% of the time it's not good enough if I end up being the 1%. Plus locals are all sketchy and nobody in their right mind wants to do mail order engine warranty work. Paying someone else is lose-lose-lose in my experience.
Yep, I used to be a big advocate of supporting local machine shops. Turns out most of them suck too and don't want to honor their work.

If I ever have to build another motor, I'm buying a nice mic and doing everything myself- I don't trust anyone .

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