Hello,
I have a 1973 Ford 3000.
It had an engine knock, no idea how long it had been there. I have put about 20 hours on it since I bought it. The first ten or so were loud because of a big old hole in the exhaust manifold - I couldn't hear the knock. I ran it another ten or so hours after replacing the exhaust manifold and muffler. The knock sound was not present all the time, usually just with throttle adjustments.
I drained the oil and took the pan off, big old pile of bearing chips underneath the oil pickup screen, and some flakes stuck to the screen.
Grabbed hold of each rod and pushed each way. #3 was clunking back and forth. Took the bearing cap off.
Crank, with the piston and rod pushed up a little.
I'm concerned with the groove that is worn on the journal.
Compare each end, circled in red. Is this normal?
The tractor has a Ford loader, 729 I think, and a 6.5 foot snowblower. I have been using the snowblower here in Michigan's UP and plan to use the loader for several landscaping and fill jobs around the property come summertime.
I am have done a lot of shade tree maintenance on my vehicles, including rebuilding a 4L60E, but have minimal experience inside the lower end of an engine. My goal is to get this running again and put it to work. I have an I&T manual on hand and Ford reprint manuals are ordered.
I'm thinking I need to check the journal diameter for size and roundness. Once I determine if it is round ... polish, measure diameter, install appropriate sized bearings, and fire it back up.
If out of round, split tractor and overhaul engine.
Tips and advice are much appreciated.
I have a 1973 Ford 3000.
It had an engine knock, no idea how long it had been there. I have put about 20 hours on it since I bought it. The first ten or so were loud because of a big old hole in the exhaust manifold - I couldn't hear the knock. I ran it another ten or so hours after replacing the exhaust manifold and muffler. The knock sound was not present all the time, usually just with throttle adjustments.
I drained the oil and took the pan off, big old pile of bearing chips underneath the oil pickup screen, and some flakes stuck to the screen.
Grabbed hold of each rod and pushed each way. #3 was clunking back and forth. Took the bearing cap off.
Crank, with the piston and rod pushed up a little.
I'm concerned with the groove that is worn on the journal.
Compare each end, circled in red. Is this normal?
The tractor has a Ford loader, 729 I think, and a 6.5 foot snowblower. I have been using the snowblower here in Michigan's UP and plan to use the loader for several landscaping and fill jobs around the property come summertime.
I am have done a lot of shade tree maintenance on my vehicles, including rebuilding a 4L60E, but have minimal experience inside the lower end of an engine. My goal is to get this running again and put it to work. I have an I&T manual on hand and Ford reprint manuals are ordered.
I'm thinking I need to check the journal diameter for size and roundness. Once I determine if it is round ... polish, measure diameter, install appropriate sized bearings, and fire it back up.
If out of round, split tractor and overhaul engine.
Tips and advice are much appreciated.