99 4.6L Head Gasket Leak
#1
99 4.6L Head Gasket Leak
My '99 F150 has 120K miles on it and is great overall shape for a 20 year old truck. However, I've found that the passenger side cylinder head is leaking oil towards the rear of the head. Thankfully no signs of coolant loss or contamination in the oil.
So, my plan of attack is:
So, my plan of attack is:
- Coolant flush (since it will have to be drained anyway)
- Replace Waterpump (since I will have the engine apart anyway)
- Degrease (i.e. clean up) the heads, valve covers, and intake
- Replace gaskets and seals
#2
According to this
https://fordcobraengines.com/ford-mo...r-differences/
some 99 4.6 engines got the PI heads.
A superchips tune did wonders for the power and throttle response on my 2002 5.4. I would recommend it especially since you can buy a used 1715 cheap. Just make sure it's not vin locked because Superchips does not support these any more. If you want power, a lower rear gear will make the most difference in getting power to the ground.
https://fordcobraengines.com/ford-mo...r-differences/
some 99 4.6 engines got the PI heads.
A superchips tune did wonders for the power and throttle response on my 2002 5.4. I would recommend it especially since you can buy a used 1715 cheap. Just make sure it's not vin locked because Superchips does not support these any more. If you want power, a lower rear gear will make the most difference in getting power to the ground.
#3
#4
I have always been under the impression that the F150 didn't receive the PI package at all until 2001.
Other than doing a PI or 5.4 swap, a programmer and some good custom tunes would be the best improvement for the money. Regearing can get costly but would make a big difference, you would also need to reprogram for the gears.
#5
My '99 F150 has 120K miles on it and is great overall shape for a 20 year old truck. However, I've found that the passenger side cylinder head is leaking oil towards the rear of the head. Thankfully no signs of coolant loss or contamination in the oil.
So, my plan of attack is:
So, my plan of attack is:
- Coolant flush (since it will have to be drained anyway)
- Replace Waterpump (since I will have the engine apart anyway)
- Degrease (i.e. clean up) the heads, valve covers, and intake
- Replace gaskets and seals
now at 355k it seems silly to repair it.