I have a bit of a strange one on my hands. I recently acquired a 2003 F150 with a 4.6l in it at an auto auction. It wasn’t running when it purchased it. A new fuel pump solved the problem.
The kicker is that it’s a single owner truck and only has 30k mi on it.
By the condition of the truck and how little if any marks on the hood or original glass, i really, really, REALLY doubt the truck spent any meaningful time at anything over 45 mph.
Based on my bore scope, it has a lot more sludge than I would expect for an engine with this few miles.
When I got it running, it had startup clatter, but it also had a cheapo filter on it, without out a adv I could find. I changed the oil with some 5w30 warren store name oil 1 qt of MMO and a new MC 820s oil filter…all of which I had on hand already. That has solved the startup clatter overall. It has a strong 25 psi of oil pressure at hot idle. I’m sure the proper filter solved the cold start rattle and not the mmo obviously.
Periodically I’m still getting some clatter at cold start from the drivers side top front from what sounds like a sticky lash adjuster. It’s about 30 seconds and goes away. I won’t hear it again until the engine is cold and it’s not always doing it..maybe like 1 outta 5 tries. I’m only 150 miles into this little MMO experiment. I was thinking of dumping it at 300 miles and go with a high mileage oil or?
I’m getting closer to pulling the valve cover and replacing the roller follower and lash adjuster (like 60/40).but I will still have an engine with a ton of sludge it it.
I used to use Auto Rx but I know that’s not a good idea anymore.
Thoughts?
Do I just roll with some high mileage oil and change it every 3 k?
The kicker is that it’s a single owner truck and only has 30k mi on it.
By the condition of the truck and how little if any marks on the hood or original glass, i really, really, REALLY doubt the truck spent any meaningful time at anything over 45 mph.
Based on my bore scope, it has a lot more sludge than I would expect for an engine with this few miles.
When I got it running, it had startup clatter, but it also had a cheapo filter on it, without out a adv I could find. I changed the oil with some 5w30 warren store name oil 1 qt of MMO and a new MC 820s oil filter…all of which I had on hand already. That has solved the startup clatter overall. It has a strong 25 psi of oil pressure at hot idle. I’m sure the proper filter solved the cold start rattle and not the mmo obviously.
Periodically I’m still getting some clatter at cold start from the drivers side top front from what sounds like a sticky lash adjuster. It’s about 30 seconds and goes away. I won’t hear it again until the engine is cold and it’s not always doing it..maybe like 1 outta 5 tries. I’m only 150 miles into this little MMO experiment. I was thinking of dumping it at 300 miles and go with a high mileage oil or?
I’m getting closer to pulling the valve cover and replacing the roller follower and lash adjuster (like 60/40).but I will still have an engine with a ton of sludge it it.
I used to use Auto Rx but I know that’s not a good idea anymore.
Thoughts?
Do I just roll with some high mileage oil and change it every 3 k?
before I did a seafoam job on it.
