- Joined
- Jul 16, 2016
- Messages
- 150
- Reaction score
- 11
- Points
- 18
- Location
- TX
- Vehicle Year
- 1988
- Make / Model
- Ford
- Engine Type
- V8
- Engine Size
- 5.3l
- Transmission
- Manual
- 2WD / 4WD
- 2WD
Ok so its common i get it. Heres what im having, the motor is super quiet under 2300 rpm and runs like a champ. after about a minute over 2300 rpm the motor gets the highway tick of the lifters and then about a minute under it goes right back to nice and quiet. I have checked the oil pressure at idle warm, 2krpm and 5k rpm and by the FAQ it is low but not insane.
I hooked up at the pressure switch with a $20 setup i made from lowes.
Now heres the deal i just changed the oil as i had no idea how old this stuff was probably 6-7 years im sure the truck was sitting. well i added 1 qt rotella 15w40 and the rest 10w30. still knocking and reproduced in those conditions. Now iv read of the different oil and its leaking from the cam bearings but I have verified when I removed the driver rocker cover i get good oil flow at idle out of the rockers. so i assume its good there and assume my issue is low oil pressure however why only above 23-2500rpm for over a minute and then clears up again when under.
Now iv read of people shimming the pressure relief valve in the pump or changeing the pump but i get good flow i just need more pressure Im tempted to shim the relief but if its not hitting the max press is that going to increase my 2500+RPM oil pressure? seems that where the issue is as low rpm its perfectly fine. Since im going to be changing this motor out end of 2017 i dont really want to spend a few hundred on pumps and cam bearings. I have no problem with a few gaskets and some time to experiment though right now.
any thoughts? iv also read about the lucas oil treatment.... right now since the truck was sitting i added all fresh fluids, MMoil to the gas and a 1/4qt of ATF to the oil to try and break up and possible clogged lifters or passages which so far seems i dont have any.
Z
I hooked up at the pressure switch with a $20 setup i made from lowes.
Now heres the deal i just changed the oil as i had no idea how old this stuff was probably 6-7 years im sure the truck was sitting. well i added 1 qt rotella 15w40 and the rest 10w30. still knocking and reproduced in those conditions. Now iv read of the different oil and its leaking from the cam bearings but I have verified when I removed the driver rocker cover i get good oil flow at idle out of the rockers. so i assume its good there and assume my issue is low oil pressure however why only above 23-2500rpm for over a minute and then clears up again when under.
Now iv read of people shimming the pressure relief valve in the pump or changeing the pump but i get good flow i just need more pressure Im tempted to shim the relief but if its not hitting the max press is that going to increase my 2500+RPM oil pressure? seems that where the issue is as low rpm its perfectly fine. Since im going to be changing this motor out end of 2017 i dont really want to spend a few hundred on pumps and cam bearings. I have no problem with a few gaskets and some time to experiment though right now.
any thoughts? iv also read about the lucas oil treatment.... right now since the truck was sitting i added all fresh fluids, MMoil to the gas and a 1/4qt of ATF to the oil to try and break up and possible clogged lifters or passages which so far seems i dont have any.
Z