Little extra rattle in 7.3
- Thread starter 91flatbed
- Start date
MidnightBlade
Shiftin' Smooth
Gary, are you thinking the timing could be too far advanced?
Fordsandguns
Fords Rule
That sucks! But at least you were home instead of on the highway somewhere.
MidnightBlade
Shiftin' Smooth
At least it didn't make a nice little window in your block, that should be a pretty easy in-frame rebuild.
Either didnt get torqued or over torqued or the rod bolt was turned and binding when torqued.
Really sucks.
Oh and mains dont knock, rods leave the crank first.
Really sucks.
Oh and mains dont knock, rods leave the crank first.
Kevin 007
Full-floater
Is it common for idi's to through rods? I have a parts motor that through a rod and I have heard of several cases of rods going through the blocks on these things.
Only one of them was a 6.9 however...
Only one of them was a 6.9 however...
bbjordan
Snow Monkey
After a rebuild it takes a LOT of time to build oil pressure. The oil pump is empty, the oil filter is empty, the oil cooler is empty, the oil passages are empty... A fresh rebuild can be destroyed on the first startup! I pulled the glow plugs on my 7.3 after the rebuild and I cranked it over multiple times before I got oil pressure. Once it got oil throughout the engine it built up over 20 psi just cranking!
Another thing to watch out for is click type torque wrenches. They can go out of calibration. When tightening up my rod nuts, I thought something didn't feel right (calibrated arm
) I pulled out my old flex beam torque wrench and found the click type one was out by over 20 ft lbs! The click type torque wrench can't just be tossed into the tool box after the job. It must be relieved, but stored with some tension on it. Typically 10 -20 ft lbs.
As for going through rods, the engines that I have performed autopsies on were either severely used or abused. These are damn tough engines! I drove my 7.3 for over 300 km after it over heated and blew a head gasket.
It actually cracked the head! I must say I have a lot of respect for these engines. 
Too much timing (advance) is also very ******* the wrist pin bushings and rod bearings.
All that being said, it still sucks that your engine threw a rod.
Another thing to watch out for is click type torque wrenches. They can go out of calibration. When tightening up my rod nuts, I thought something didn't feel right (calibrated arm
) I pulled out my old flex beam torque wrench and found the click type one was out by over 20 ft lbs! The click type torque wrench can't just be tossed into the tool box after the job. It must be relieved, but stored with some tension on it. Typically 10 -20 ft lbs.As for going through rods, the engines that I have performed autopsies on were either severely used or abused. These are damn tough engines! I drove my 7.3 for over 300 km after it over heated and blew a head gasket.
It actually cracked the head! I must say I have a lot of respect for these engines. Too much timing (advance) is also very ******* the wrist pin bushings and rod bearings.
All that being said, it still sucks that your engine threw a rod.
I did use a click type torque wrench. Never crossed my mind to double check with the other wrench. But hey, lessons learned aren`t soon forgotten. I got the motor back out of the truck, and pulled the oil pan. When i got the pan off and got to the rod, it had one bolt in the rod that was broke, look like it had been twisted in two pieces. Not sure what went wrong, but it sure made a mess.
