to plug or not to plug

[gpeter7761]

Do the two holes above the thrust plate on the front of the block need to be plugged??

 

[fishy68]

Not the 2 right above the thrust plate. There are 2 behind the thrust plate that need plugged.

 

[396 Signet]

Anyone know where to get these? Measured the hole size, both were .583" which seems to make no sense. Standard plugs seem to be either too big or too small. 9/16=.5625, 37/64=.5781, 19/32=.5938, have a 9/16" which of course is way small.

 

[fishy68]

Anyone know where to get these? Measured the hole size, both were .583" which seems to make no sense. Standard plugs seem to be either too big or too small. 9/16=.5625, 37/64=.5781, 19/32=.5938, have a 9/16" which of course is way small.

I believe that 19/32 should work fine. It is .010 over but they collapse pretty much when you drive them in. I just tried one in an extra 360 block I have hear and it looks like it will go in fine. I didn't actually drive it in all the way because I'm not ready to put plugs in it but I started it and it looked like it would go on ok. You should be able to get it at the local auto supply if you don't have one. I think I got the ones I have at NAPA. Another place to try would be a engine machine shop.

 

[396 Signet]

19/32 were super tight but worked great, they definitely won't be comimg loose. Thanks!

 

[fishy68]

Good deal Sig. Glad you got it.

 

[jefflock]

Why plug them? When the the plate is installed it blocks the holes. Just curious on this. Thanks Jeff

 

[fishy68]

Jeff the cover may cover them up and half way seal it but it's not oil tight. It will leak some if you don't plug them. Ask me how I know.:banghead: