I have a 99 Dodge Ram with a 318. Several months ago the engine developed a strange Noise that I was told was Pre Detonation. The Check Engine light came on and it was discovered the piston in the Number 4 cyclinder had a hole burned in it. The truck only has roughly 55k miles on it so I decided to replace the motor. I bought a reman motor from a reputable company in Nashville Tn. After pulling the old motor the mechanic found oil in the intake and failed intake gasket. the new motor was installed, I also replaced the catalytic convertor. after driving the the truck for roughly 500 miles the same problem came back, Guess what,,,same problem,,,another burned piston. Engine was removed , this time the intake gasket had not failed and there was no oil present. Engine was shipped back to the company and after 2 weeks they said it was caused by Pre detonation,Second engine was shipped and installed. This time we had the intake check by a machine shop to ensure the bottom was not warped, it wasnt. All the injectors were checked before being re installed , after the motor was installed and running check engine light came on saying Faulty o2 sensor. it was changed. We took the truck to a Dodge Delearship and they did several updates to the computer and reset some settings per SB that were for the motor. I just picked up today and am somewhat scared to drive it in fear of ruining another motor. My question is do any of the issues I ahve described sound like a problem that would cause a burned piston?, The Repair shop that has done the work is very reputable and stood behind the motor, so I am not out any money other than the original cost of replacing the motor. Any Input would be Appreciated

 

who is the mod here? this should be moved to 2nd gen

 

weve got moderators here in 1st gen?