Phansm72

Yeah . I cant wait to get it done. I have gotten most of my parts, the local ford guys are having some trouble figuring out the right main bearing for me to use. The crank is a brand new std grind boss 302 crank from ford. They are showing 3 different main bearings for it , same part number but there is a grade 1 grade 2 or grade 3 option.....Shane I know yall sell the cranks , any clue?

Phansm72

Ok , so I learnt something new today. The coyote and boss 302 crank main bearings are individually graded. When looking up the std or oversize main bearing from ford it comes up with 3 grades for each main bearing 1 2 and 3 . The way it works is in the workshop manual they have a scale and what you have to do is take a letter from the engine number on the block and a number from the crank , using the 2 numbers you go over to the point where they meet and it tells you which main bearing to use for each journal. Each journal is individually rated so you may have a grade 1 bearing on number 5 main and a grade 2 bearing on number 3 main etc etc. Holy crap batman over engineered?

What ever happened to the days of one set of rod and one set of main bearings....

AMWill

EDIT: I didn't see your response before I posted because I kept your thread up, so I could think about it for a night. Glad you got everything figured out though!

Phansm72,

To be honest, I'm not exactly sure, unfortunately. I do have one idea that comes to mind-

Most V8 engines use different main bearings per main cap. Since there are five main caps on a V8 you'll usually have 2 sets of 2 bearings being exactly the same and then one thrust bearing in the middle main cap. For lack of better words..

Basically if there's three different styled main bearings you'll have it setup like this-

3 - 2 - 1 - 2 -3

Hope this helps some! Let me know how you make out!

Shane

Phansm72

Ok the main bearing dilemma has been solved, not only is each main bearing individually sized on the coyote but the upper and lowers are individually sized. There are 2 charts you use to size them .One chart sizes bearing 1 and 5 and one chart sizes 2 3 and 4. There is a number stamped on the crank and one on the block.



HLKLOC3 is my block number. So HLKLO is bearing 1-5 . There is a similar number on the back of the crank you use to size with and cross reference the block number.

so the bearings can be a combination of 1/2 2/2 2/3 3/3 upper and lower bearing. You size each one this way.

Phansm72

Another thing I learnt yesterday is the connecting rods are made as one piece , the lower bearing cap has to be broken off! I read that they had Crack rods , i didnt realize that you actually had to crack them off. They have a score line on the inside of the rod bearing area, (just like breaking glass) you remove the rod bolts and take a whack at the lower cap and it actually snaps off.....

Phansm72

Parts have been rolling in for my build ,after sizing them all I now am waiting on my main bearings to arrive so that we can go deep.

Phansm72

The boss 302 piston kit comes with oil squirter block off plates

Phansm72

Intake arrived as well as a few other goodies

Phansm72

Boss 302 forged crank

Menace

Wow, that is a lot for me to try and comprehend right now, but is this engine going to be going into your 04? What else do you plan on needing to do to it to make it work?