Week 7

This week I got to help out rolling in some new main and rod bearings into a cat 3116. The engine was making some noises when reved up. It was also know that it had been ran low on oil a couple of times and it was also gonna get a new oil pump, which is supposed to be an updated pump.

The first bearing we replaced was the thrust bearing. To get it out we used a trick one of the guys had learned where you put a small roofing nail in the oil passage on the crank and turn the engine over by hand and the bearing will spin right out. We were only able to do this on the thrust bearing though because it was the only one with an oil passage but the other bearing were fairly easy to get out.

The thrust bearing ended up showing a lot of wear on it. The thrust bearing didn't want to slide back in very easily so we had to use a pry bar on the counter weights on the crank to slide the crank side to side to get it lined up to slide the thrust bearing back in because of the extra surface area that the thrust bearing has.
The rest of the install went smooth. The other bearings all had some wear on the. One unusual thing that was noticed on the rod bearings was that they all had a wear spot on them in the exact some spot on each bearing.

The torque spec for the main caps was 45 ft/lbs and then you turn the bolt another 90 degrees. The torque spec for the rod caps was 45 ft/lbs and the you turn the bolt another 60 degrees.
After the install the engine noise was gone.

 

This week =46, total =204