KDP carnage
#1
Registered User
Thread Starter
KDP carnage
Working on my donor engine for my '74 Crew Cab tonight and when I pulled the front cover to replace the front seal and gasket I was dismayed to find the KDP was MIA.
And upon further inspection I found that it made a journey south, leaving behind a path of destruction.
The cracked case is easily seen in that pic. Oddly enough the engine didn't leak oil too badly.
And upon further inspection I found that it made a journey south, leaving behind a path of destruction.
The cracked case is easily seen in that pic. Oddly enough the engine didn't leak oil too badly.
#2
Registered User
Thread Starter
What really has me concerned is the broken cam gear tooth.
This engine ran well and has no other issues. The IP was recently rebuilt before I bought it, no smoke, or odd noises. I do have a parts engine with, what I hope is a good case. Should I be concerned with the chipped cam gear or just let it ride?
This engine ran well and has no other issues. The IP was recently rebuilt before I bought it, no smoke, or odd noises. I do have a parts engine with, what I hope is a good case. Should I be concerned with the chipped cam gear or just let it ride?
#4
Registered User
Thread Starter
It's not that simple. The IP and vac pump have to be removed. Cam gear is a press fit, so cam has to come out, and the timing pin is supposed to be checked against true TDC on number 1 cylinder when the gear case is changed.
#5
Registered User
Might as well change the gear then.
OR
Case really doesn't look like some of the other ones that had KDP damage. If it barely leaked I think I might try sealing it up and running it as is with same gear.
OR
Case really doesn't look like some of the other ones that had KDP damage. If it barely leaked I think I might try sealing it up and running it as is with same gear.
#6
Registered User
Cummins now pulls the gear off the cam rather than pulling the cam to change out timing cases. Then they heat the gear up and press it back on the cam.
You could do it either way.
Or just seal up the crack in the cover and run it as is.
You could do it either way.
Or just seal up the crack in the cover and run it as is.
The following users liked this post:
thrashingcows (10-21-2016)
#7
Administrator
Eh, if you have the engine out of the truck it isn't a big deal to pull the cam and fix it right.
Just keep engine upside down while cam is out or at the least on its side so tappets don't fall out.
Just keep engine upside down while cam is out or at the least on its side so tappets don't fall out.
The following users liked this post:
j.fonder (10-20-2016)
Trending Topics
#9
Registered User
Thread Starter
By the looks of the engine, it has been running quite a while like this. I can't see any marring on the crank or pump gear to warrant changing gears. I plan to attempt to dress it with a gear stone and reuse it.
The following users liked this post:
mknittle (10-20-2016)
#11
Registered User
I agree witht eh others....just clean it up and run it. I wouldn't bother with replacing the case. I would probably clean the cracked area really well, the smear some RTV or some similar product on the inside of the case over the crack...then maybe some JB weld, or two part epoxy on the outside?
The following users liked this post:
NJTman (10-21-2016)
#13
Registered User
Thread Starter
After seeing this mess, every other 5.9BT I own or work on will get the KDP tabbed or at least the hole in the gear cover staked so the pin can't exit.
#14
Registered User
Thread Starter
I agree witht eh others....just clean it up and run it. I wouldn't bother with replacing the case. I would probably clean the cracked area really well, the smear some RTV or some similar product on the inside of the case over the crack...then maybe some JB weld, or two part epoxy on the outside?
#15
Registered User
I agree. I've heard stories of the KDP going the other way and wiping out the entire gear train, bending push rods and valve, and other such nonsense.
After seeing this mess, every other 5.9BT I own or work on will get the KDP tabbed or at least the hole in the gear cover staked so the pin can't exit.
After seeing this mess, every other 5.9BT I own or work on will get the KDP tabbed or at least the hole in the gear cover staked so the pin can't exit.