[yragat]

I have a soft plug on the side of the block leaking. I have replaced it,but still leaks,because the block is corroded somewhat where the soft plug goes in. this engine takes the type that is like a cone-shape and you dent the middle of it to make it expand and seal. Is there some type of sealer for this application? I don't want to add stop leak to the cooling system

[yragat]

This is not a pissing leak,just a seeping one The plug is a new brass one and to replace it with the engine in the car is next to impossible. If I drain the coolant and dry the area,is there anything I can put on from the outside to stop the leak?

[327NUT]

If you can't get that one to seal they make a rubber expansion type plug that fits the hole. Install in the hole and tighten the nut in the middle which expands the rubber. If the block is that corroded you better look at the others also.

[S10 Racer]

Originally Posted by yragat

This is not a pissing leak,just a seeping one The plug is a new brass one and to replace it with the engine in the car is next to impossible. If I drain the coolant and dry the area,is there anything I can put on from the outside to stop the leak?

You're not going to seal it up by applying anything to the outside of it. The best way (and I know you don't want to hear this) is to remove it, clean and dry the hole. Apply Permatex to the plug and reinstall.
They make an expandable plug also (picture attached). It has a rubber seal that is inserted in the hole and then you tighten it up with a wrench to expand it. This is the best fix without pulling he motor.

[yragat]

I don't think the expandable type would work.The seat is only about 1/8" deep it takes this type soft plug.(see pic)

[S10 Racer]

Originally Posted by yragat

I don't think the expandable type would work.The seat is only about 1/8" deep it takes this type soft plug.(see pic)

What type of motor? Never seen a freeze plug like that, must be an import.

[yragat]

1960 Cadillac!

[S10 Racer]

Originally Posted by yragat

1960 Cadillac!

Never would have guessed that.

[timothale]

I've had expansion plugs blow out BUT never Have had an engine block heater leak. , they use a metal cross bar inside the block. that the allen screw tightens into. We have a lot of vehicles, tractors, forklift, etc with block heaters, Just had to replace one on the Backhoe, there was ice on the water other morning and the diesels like to be warm. some one wire a household plug up to the farm pump, 220v, burned out the heating element.