7.3 connecting rods
Lead Driver
Joined: Oct 2009
Posts: 5,406
Likes: 229
From: Pa
Look at the rod's, if they are the older forged rod's they will have a line all the way around the rod. Forged rod's also have nut's on the stud's.
The later forged rod's (Sinter Forge) are smoother with no "cast" lines. The PMR FORGED rod's will have a bolt.
There are pictures in the link included elsewhere in this thread.
The later forged rod's (Sinter Forge) are smoother with no "cast" lines. The PMR FORGED rod's will have a bolt.
There are pictures in the link included elsewhere in this thread.
Lead Driver
Joined: Oct 2009
Posts: 5,406
Likes: 229
From: Pa
"[quote=cleatus12r;10559242]I guess I may elaborate a little more.
I wouldn't call one process more "refined" than another. The forging process is a good bit different, but what happens to the connecting rod AFTER forging is quite different.
The "forged" rods are cast as two pieces. The main beam is produced separately from the cap of the "big end". The two halves of the big end are mated together (using a machining process), the rod bolts installed and torqued, the bore is machined, and then honed. At this point, the cap and the rod are a matched set. Then it's back apart to install in the engine. While it is possible to bolt another rod's cap on any of the other rods (and there will be little to no indication that it is incorrect), it is very possible to end up with journal clearances that are too tight, too loose, or just a bit off-center. The "forged" rods take a lot more machining to be correctly fit to a crankshaft journal."
The Forged Rod's are Forged all at once. The Crank end in most cases was Oval, and had to have the "straights" machined off, to make the hole round, than put together and honed.
I wouldn't call one process more "refined" than another. The forging process is a good bit different, but what happens to the connecting rod AFTER forging is quite different.
The "forged" rods are cast as two pieces. The main beam is produced separately from the cap of the "big end". The two halves of the big end are mated together (using a machining process), the rod bolts installed and torqued, the bore is machined, and then honed. At this point, the cap and the rod are a matched set. Then it's back apart to install in the engine. While it is possible to bolt another rod's cap on any of the other rods (and there will be little to no indication that it is incorrect), it is very possible to end up with journal clearances that are too tight, too loose, or just a bit off-center. The "forged" rods take a lot more machining to be correctly fit to a crankshaft journal."
The Forged Rod's are Forged all at once. The Crank end in most cases was Oval, and had to have the "straights" machined off, to make the hole round, than put together and honed.
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
7.3 DIT Connecting Rods:
Dates:
Forged Rods: 1994-2000
PMR Rods: 2001-2003
Engine Serial Numbers:
Forged Rods: 501 - 1,425,746
PMR Rods: 1,425,747 - 2,030,402
Part Numbers:
Forged Rods: F4TZ-6V200-CARM
PMR Rods: 1C3Z-6200-AARM
Dates:
Forged Rods: 1994-2000
PMR Rods: 2001-2003
Engine Serial Numbers:
Forged Rods: 501 - 1,425,746
PMR Rods: 1,425,747 - 2,030,402
Part Numbers:
Forged Rods: F4TZ-6V200-CARM
PMR Rods: 1C3Z-6200-AARM
Thread
Thread Starter
Forum
Replies
Last Post
JacoFordCummins
Engine Swaps
45
Nov 4, 2020 09:09 AM
derek0525
1999 - 2003 7.3L Power Stroke Diesel
4
Aug 20, 2016 04:50 PM
juancho_uy
Ford Inline Six, 200, 250, 4.9L / 300
11
Nov 19, 2015 08:12 PM
