Flathead block coolant drain plug

[JBNeal]

additional information - Freeze Plug Installation 

more additional information - Freeze Plug Installation

Edited October 16, 2019 by JBNeal
revised link

[harmony]

On 10/12/2019 at 1:18 PM, Los_Control said:

here is what mine looked like, and I bought brass replacements

 

Here is a example of the deeper one I spoke of

 

 

 

Good to know.  Yeah the deeper dish ones are the ones I remember.  I'll make sure I find the thinner ones.  Thanks 

[harmony]

32 minutes ago, JBNeal said:

additional information 

more additional information

Thanks for those links.  Very helpful if I decide to pull a  frost plug

[Jocko_51_B3B]

I have a related coolant drain valve problem. I was able to remove the old valve and replace it with a new one. But - no doubt due to corrosion inside the coolant passage - I saw that there were only 2 to 3 pipe threads left in the block to screw the drain valve into. I put some Permatex sealant on the valve threads and it's holding, but I really don't trust it. I wonder if there is something that can be done to repair the block and restore the pipe threads. I'd feel much better with six or seven threads in there. Or is there some other clever way to make the valve secure and leakproof rather than resorting to JB Weld?

[Dave72dt]

Since pipe threads are tapered and depending on how deep your current valve is set into the block, you may be able to run a pipe tap in and create a few more partial threads.  If your valve is bottomed out, you may need to consider drilling and tapping for the next larger size.

[Fernando Mendes]

On 10/10/2019 at 9:30 AM, ggdad1951 said:

you can also drain via the petcock on the bottom of the radiator....

 

[Tooljunkie]

25 minutes ago, Fernando Mendes said:

 

Thats fine,but all the  coolant from the water pump down remains in the block. Not an issue for pulling head or thermostat, but to flush block all the coolant has to come out.