3.0 freeze plug

[mike 99 ranger]

I was just about to fire up my 1999 3.0 after replacing the heads when I found a leaking freeze plug. Anybody have comments about using the rubber seals (you put them in and tighten a nut).

Mike

 

[AZFX4]

I was just about to fire up my 1999 3.0 after replacing the heads when I found a leaking freeze plug. Anybody have comments about using the rubber seals (you put them in and tighten a nut).

Mike

I have used them before with no issues

 

[RonD]

They are fine to use.

Manufacturer uses the pressure plugs because they are cheaper, not better.

And just FYI, the holes are there to remove the sand after engine block is cast and metal hardens, proper name is casting hole or core hole.
They are not there to prevent freezing and cracked blocks.

 

[txgocartB3000]

Just an FYI...

If you need to replace a plug do not just knock it into the block.

Pull it out, this will be the best method.

If you just knock it in you run the risk of it being a blockage for your coolant circulation.

Sure lots of people have gotten away by hitting them in but why risk it.

Ray

 

[mike 99 ranger]

Thanks for the feed back, I'll give them a try.

Mike

 

[McCormack]

And just FYI, the holes are there to remove the sand after engine block is cast and metal hardens, proper name is casting hole or core hole.
They are not there to prevent freezing and cracked blocks.

That may be true, but years ago I messed up and didn't have antifreeze in my Chevelle, and on a cold fall night the coolant froze and pushed the freeze plugs out, and after installing new freeze plugs everything was fine.

Did the freeze plugs prevent my block from cracking? I don't know, but I like to think that they did.

 

[adsm08]

That may be true, but years ago I messed up and didn't have antifreeze in my Chevelle, and on a cold fall night the coolant froze and pushed the freeze plugs out, and after installing new freeze plugs everything was fine.

Did the freeze plugs prevent my block from cracking? I don't know, but I like to think that they did.

They may have, but that's not their primary purpose. 9 times out of 10 by the time the plug is pushed out the block has already cracked.