Cam Bearings?

[jackn440]

Anyone here ever spun a cam bearing? If so, what are the symptoms. Just rebuilt the engine a couple months ago, they were the only bearings I didn't replace. Couple days ago it started losing oil pressure and eventually started making a loud squeaking sound that increased/decreased with idle speed. Kept driving for another mile or so and it developed a bit of a knock along with the squeak. At which point I immediately shut the engine off. Gonna tear down the motor if I get a chance tomorrow (Thurs), so I guess I'll know then.

 

[djwhog]

Depends which one, but you can loose oil to the top end for the rockers etc, not good, sorry!

 

[jackn440]

Just pulled the intake and rocker arms. 7 of the lifters were completely caved in on the cam mating surfaces, and #2 exhaust lifter's plunger came out and was sitting in the valley. No bueno.

 

[6packcuda]

Wow! No bueno is right. Lubrication problem maybe? Maybe the oil pump went. Will be interesting to see what the bearings look like now.