Broken cam

12valve

12valve

Diesel Boy
Joined
Aug 4, 2006
Messages
576
95 Truck quit running while passing another vehicle on the highway,
took of the valve covers and found that the rockers arent rocking while cranking, i suppose its a broken cam..

Anyone ever broke one?
 
^^^what he said, depending on where it broke (if it did) u should see some push rods moving. id pull the front cover off.
 
A guy I know had his truck do the same thing. Just quit sitting at a stop light. A friend of mine bought that truck, and yanked the cam out of it. It was broken right behind the first journal. Also found a chewed up case bolt. Consensus says that the bolt went between the gears and the cam was the weakest link.
 
^^^^^^^ seen 2 "KDP" victims so far in my short cummin career....

both of them were housing bolts that got chewed... not the KDP

hell my kdp is hanging out a bit... tried smackin it with a hammer, will not budge... red loc tited all the bolts and called it a day.
 
i had one a while back that had a timing case bolt back out and break the oil pump.
 
They would have bent when it happened. Cant hurt them any worse
 
I bought an 12 valves engine for parts last year and the cam broke right off behind the cam gear... bent push rods and broken lifter, the rest looked fine.

I hope you will be lucky like that !
 
blacksmoke83 said:
I bought an 12 valves engine for parts last year and the cam broke right off behind the cam gear... bent push rods and broken lifter, the rest looked fine.

I hope you will be lucky like that !
Click to expand...

Kinda! the came broke just behind the gear.
Trucks back up and running! didnt even pull the head!
it had a couple bent push rods and all the gears where messed up and needed replacing.
the cause was a stuck vacum / powersteeering pump
 
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