Originally Posted by
Blown 331
If you can get to them you can try using a punch along the edge of the plug. Hopefully that side will push into the block while the other side pushed out so you can grab it with pliers. I would use the brass plugs so you no longer have to worry about rust through. I usually put a slight coating of permatex non-hardening gasket sealer around the edge of the new ones and install them with a socket that fits inside the plug and hammer it in.
If you don't have enough access to do this in the truck you can always try a rubber one. I've never used one and I'm sure it's not as good as replacing the plug correctly but I'd say it could get you by for a little while until you can make the correct repair. You install the rubber one then turn the nut which expands the rubber until it seals against the block.
Dorman/Freeze Plug | Freeze Plug | 1977 Ford F150 1/2 ton P/U 4WD 8 Cylinders H 5.8L 2BLModified OHV | AutoZone.com
Blown 331 has the correct information. I would only use the expandable freeze plugs in an emergency. I used them and of course on a hot day in the middle of no where the one expandble freeze plug went.
The easist way is to pull the engine if you have the equipment and time, this way you are sure to get to all including the one in the rear of the block.(If you have one there)
If not then please follow the advice of Blown 331 and use the brass. Don't worry if you knock one in sideways get a pair of vise grips and gently force that thing out.
Hope this helps,
Mike