Engine block drain size?

[SS/GN]

What is the size of the coolant drains in the side of the block?I would like to put rad drain valves in to empty the antifreeze when I do a sevice on the cooling systemThanks in advance

Kevin

 

[nonosv6]

not positive, but i think they are 1/8" npt.....why not just flush the coolant completely out with engine running?

 

[chrisgarrett]

Yes, 1/8" npt.

 

[SS/GN]

Thx

Thanks alot muchly appreciated.:biggrin:

Kevin

 

[Steve V]

Those plugs are PITA to get out with engine in car. May want to heat them a bit. I've rounded my share:smile:.