Water drain plugs on a 59-series block- What thread pitch are they?
 

In the process of doing up my 59 AB. The machine shop lost those two plugs on the lower sides of the block that drain out the coolant.

Can someone tell me what thread pitch these plugs are? They don't look like to pipe thread, but I can be wrong.

Thanks,

Tim

Re: Water drain plugs on a 59-series block- What thread pitch are they?
 

1/4 pipe I think.I will have to look. to be sure.Just checked if they are just behind the pumps- mine are 1/4 pipe.

Re: Water drain plugs on a 59-series block- What thread pitch are they?
 

Thank you.

Re: Water drain plugs on a 59-series block- What thread pitch are they?
 

I think 1/4" pipe

Re: Water drain plugs on a 59-series block- What thread pitch are they?
 

1/4 inch pipe fit in mine or 1/4 petcocks. I don't think it is a special thread.

John


Slow typer.

Re: Water drain plugs on a 59-series block- What thread pitch are they?
 

Thanks all! Now on to figuring out which oil gallery plugs my block had. Can't even tell you how angry I am at the machine shop.

Re: Water drain plugs on a 59-series block- What thread pitch are they?
 

>>>Thanks all! Now on to figuring out which oil gallery plugs my block had.>>>

As I recall, a 1/8" pipe plug with a funny appendage behind the cam gear. And a brass plug behind the flywheel. Jack E/NJ