Ok guys I was towing my boat home from the lake as I was going up a hill in town I encountered a MAJOR problem. I dumped my entire coolant system. I just did a head gasket about 10K miles ago. I run ARP’s and I have an upgraded turbo. I know it’s leaking from the back of the block. Any guesses to what my problem is?

 

 

The freeze plug on the back of the block comes mind. Might have lost it.

Edited April 6, 20187 yr by dripley

I agree with Dave.  Might try a billet bolt-in one if that's the case. 

Edited April 7, 20187 yr by trreed

From the driver side look up towards the back of the block and you'll be able to see the freeze plug back there. 

 

If your rotting out freeze plugs it might be a good idea to replace them all. Typically stems from people over using the coolant till its corrosive and the damage is done. 

14 hours ago, Mopar1973Man said:

From the driver side look up towards the back of the block and you'll be able to see the freeze plug back there. 

 

If your rotting out freeze plugs it might be a good idea to replace them all. Typically stems from people over using the coolant till its corrosive and the damage is done. 

 

The Freeze plug is completely gone. I have a hunch that my truck sat for many years. When I replaced the thermostat a long time ago the head looked like it had almost rusted something. Maybe the antifreeze went bad and etched the head?. How difficult is it to get the remaining 3 out? 

Edited April 7, 20187 yr by JDHudsn

There is more than 3 more. Typically use a punch and a hammer. Now knock one side in so you can get a hold of the edge and pull it out.

Just now, Mopar1973Man said:

There is more than 3 more. Typically use a punch and a hammer. Now knock one side in so you can get a hold of the edge and pull it out.

 

I thought there was 1 on the back and 3 on the passenger side?

Another hidden behind fan pulley mount.

And then all the little ones in the head if you're feeling extra adventurous. Did the machine shop redo those ones?

Edited April 7, 20187 yr by trreed

22 minutes ago, Mopar1973Man said:

Another hidden behind fan pulley mount.

This is sounding like a large project.... haha darn it!

6 minutes ago, trreed said:

And then all the little ones in the head if you're feeling extra adventurous. Did the machine shop redo those ones?

Great question I’ll have to ask

Any freeze plugs behind the trans?  

 

Probably going to have trans re-built this summer, anything I should change when 47re trans is out?

From what I know freze plugs are stainless steel, unless someone changed them.

If I'm not mistaken there are freeze or expansion plugs behind the tappet cover as well.

On 4/7/2018 at 5:57 PM, Tom Robarts said:

If I'm not mistaken there are freeze or expansion plugs behind the tappet cover as well.

Oh no those are permanent freeze plugs I hope??!! I remember seeing those when I did my tappet gasket ?.