The easiest way to replace them is to punch a hole in them and pry them out with a screwdriver. [links]
See full version: Replacing freeze plugs
The easiest way to replace them is to punch a hole in them and pry them out with a screwdriver. [links]
By the way they are not "FREEZE" plugs. They are core plugs for the casting process.
Drive the new ones in with a mallet and a deep socket or other driver that just fits inside them. Use brass replacements.
Drive one edge of the plug in with a punch. this should cause the plug to flig sideways allowing you to grab it with pliers and pull it out. Then coat the edge of the new seal and the hole with sealant, place a socket that just fits inside the new plug and carefully drive it in. Keep it square to the opening. [links]
If they popped out because your block had water in it and it froze you may have bigger problems. here
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(e) means, located intermediate said freeze plug and said plug seating end of said body for centering said force transferring means within said freeze plug.
FIG. 5 is a perspective view of the driving cap. [links]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 6 illustrates use of the present invention to install a freeze plug into an engine block aperture with limited working clearance. [links]
Are there any tricks to installing concave freeze plugs in 235/261 engine blocks. The plug I need to install is located behind the bell housing, so a leak would be very unhandy if discovered after the engine is installed. I looked in the GM factory manual and did not see this topic addressed.
I replaced mine when I had the toeboard cut out. [links]
I think the one behind the bell housing is the convex type that sits on a lip. If so, put some sealant on it and hit the centre to expand it. A rebuilder told me to place a hammer on the centre and then strike the hammer with another hammer. I have some photos in my webshots of mine before and after.
http:/ / rides.webshots.com/ photo/ 1316417356041873203xTDshC
1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed [links]