Just back from the machine shop, Pics!

[towcat]

It appears to me that those pistons are installed the wrong way. Like maybe someone thought they were working on a 6.5 with the prechamber on the exh side not the intake side.

+1 on that. time to take back to the shop.

 

[Todd C]

typ4:
Sorry some how I missed your post, you beat me to it... I gotta read a little more carefully
Todd

 

[typ4]

Redundancy on a matter this important is not an issue., Also the flat sides of the rods go together,the chamfer has to go to the crank for the fillet radii.

 

[nightrunner84]

Redundancy on a matter this important is not an issue., Also the flat sides of the rods go together,the chamfer has to go to the crank for the fillet radii.

I will bring this up as well. Thank god for you guys, I don't know what would have happened if I assembled it this way, but didn't want to find out.

 

[f350flatbed]

When I put mine back together I didn't think that there was an orientation to the rods. What happens if they are in wrong?

 

[Agnem]

Oh that must suck, not knowing if they are in right or not.

Get an oil sample off to Blackstone labs. If they are wearing on the crank badly, they will tell you.

 

[flatlander]

Redundancy on a matter this important is not an issue., Also the flat sides of the rods go together,the chamfer has to go to the crank for the fillet radii.

Thank you, I couldn't find my manual but I knew there was a right way and a wrong way.

 

[Todd C]

Here's a picture of one installed. If you look up at the pin end of the rod, inside the base of the piston, you can see the rectangular area of the rod facing out. That's how I am keeping track of which side is which.
Thanks Typ4 for the explanation...

BTW just ignore that hairline crack in the crank between the rod journal and the main journal on the right...
Those of you going to the rally will see what that looked like after I pulled the crank... (thanks to Mel)
Todd

 

[nightrunner84]

Ok, kust left the shop and showed him the picture. He admitted his mistake and told me to bring it back. If they messed this up, how do I know the rest of the motor is correct? Also, I bought the ARP studs, they should be here in about 5 days.

 

[towcat]

...... If they messed this up, how do I know the rest of the motor is correct?

take lotsa pics and post here.
digital doesn't cost anything, so blast away at many angles.

 

[typ4]

I am sure they didnt really mess up, you have to realize many more chevy diesels need work that IDI,s and that is what they are used to fixing.

 

[Todd C]

That's interesting, the machinist that did my work made a similar comment about the chevy diesels...

 

[memphisrain]

Who did you take the motor to? I still have parents in the Dayton area, and may eventually need to find a machine shop there.

Check this article for checking valve clearance:

http://www.chevyhiperformance.com/techarticles/0702ch_piston_valve_clearance/page_2.html

mR

 

[6.9poweredscout]

2 stories. 1. the machine shop i go to the guy is VERY negative and is picky about what motors he likes, he said he likes the 6.9 alot, the 7.3 he said usually needs boring and sleeving when rebuilt, so that was very pleasing to hear!

2. we had a mid '90s chebby dually 6.5 knocker come in when i worked at the dealer that was knocking louder than usual, the motor was worn out bad, someone used soda cans to shim the bearings up..... we had it rebuilt, 6 months later it was towed in, the crank snapped. GM quality right there.

-Jon

 

[nightrunner84]

Who did you take the motor to? I still have parents in the Dayton area, and may eventually need to find a machine shop there.

I took it to Genuine downtown.