21 stud motor babbitt or not?

[Brendan]

can you tell if a 36 motor has babbitt bearing looking at the main caps?
and are the rod bearings a full floating Bearing?

thanks, Brendan

 

[JM 35 Sedan]

Brenden, You can easily tell poured babbitt mains from insert mains on a '36 by measuring the center distance between main bearing studs. The poured mains will measure 3" center to center on studs and 3-1/4" on insert bearings on an LB block. It's good to know this because you can quickly check an engine from the lower end w/o the need to remove the main brg caps. The rod bearings would be full floating unless some one has previously changed the crankshaft. JM

 

[Bruce Lancaster]

There is a significant difference in span between the main cap studs...the dimensions are in the service bulletins.

 

[Lawrie]

On the 36 insert blocks I have they all have about a 5/8 hole in the web on the block next to the timing cover ,the babbit engs dont.Lawrie


http://farm1.static.flickr.com/172/443272930_ce167f29fb_o.jpg

 

[flatjack9]

The rod bearings are full floating and flanged, unlike the later full floaters.

 

[Brian]

Lawrie, That feature is only evident on Canadian blocks; the American blocks don't have that hole. Luckily, all us guys down under got the Canadian stuff and checking for that hole is a quick reliable method of identifying those early blocks. Brian