hey guys i got a question i have a 85 ford f250 that ihave been having problems with. the problem is its got a rattle in the motor it only does it when you hold the truck at the same speed the oil pressure runs at 40psi but when i let off the foot feed the oil pressure goes up to 60psi it does not rattle when you start it up or when you gas on it . it is a 460 engine any help would be app.
josh

 

I'm not too familiar with the 460 but my 370 had a similar symptom. I found that the air pump was the cause. Do you have one?

 

skyline drive
no my 460 does not have a air pump any my sug?

josh
85 f250 4x4 c6 460
81 f250 4x4 c6 351m