Freeze plug

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Eric85

Well-known member
On Super C Replacing the freeze plug on the back of the engine (behind flywheel)
The one I took out was flat. The one I got from Napa is brass but shaped like a frying pan, looks like it should fit. Is it ok to replace the old one with this different style one. ?
 
Eric85":13eqek4b said:
On Super C Replacing the freeze plug on the back of the engine (behind flywheel)
The one I took out was flat. The one I got from Napa is brass but shaped like a frying pan, looks like it should fit. Is it ok to replace the old one with this different style one. ?
Click to expand...
Yes. Clean up the opening. Bit of sealant if you desire. Curve side out. Rap the center of the curve to seat the freeze plug. Check to see if it's tight.
 
I don't know about this application but I find that, sometimes, the cupped plug will not work well in place of the disk style. The disk style plugs are getting harder to find, a good parts man can fix you up, though. The last time I needed them, I got them from McMaster Carr.
 
just as a bit of information, they are not freeze plugs. they are casting plugs, or more properly Welch plugs, named after the inventor.
 
use the type of plug you took out, the hole is made different between the two types, the disc type bottoms out in the hole then you hit it with a punch in the center for it to tighten it in to place, the cup style is just driven in to the hole put sealer on the edges of the plug, make sure the hole is clean in the block
 
I got the job of changing freeze out plugs in a hearse once when no one else would touch it.
Some plugs to install them I used a 1/2 “ extension with a socket backwards with a universal to drive the dish shape freeze plug into the block. The hardest part was driving the hearse back to the customer. All I could think of was the Adams family on tv.
 
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