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Parkerdoug

5.4 triton

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I ask because I've heard so much bad about these engines.then I read there one of the longest lasting SUV's.

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2 valve 5.4 are very reliable. Some basic maintenance is all that’s required. Proper spark plug torque is required plus coolant changes are fundamental. Other than that a good buy if not tagged out. 

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From Wikipedia

 

Quote

2-valve 4.6 L, 5.4 L, and 6.8 L engines found in many 1997-2008 Ford, Lincoln, and Mercury vehicles may have aluminum cylinder heads with threads for spark plugs that are stripped, missing, or otherwise insufficiently bored out. Ford acknowledges this issue in TSB 07-21-2 as well as earlier TSBs. Ford's TSB does not state that this issue is caused by owner neglect. Ford's only authorized repair procedure for out-of-warranty vehicles is to use the LOCK-N-STITCH aluminum insert and tool kit. For vehicles under the New Vehicle Limited Warranty, Ford will only cover the replacement of the entire cylinder head; however, the Ford recommended spark plug service interval extends beyond the duration of the New Vehicle Limited Warranty.

 

3-valve 5.4 L and 6.8 L engines built before 10/9/07 and 3-valve 4.6 Ls built before 11/30/07 found in many 2004–2008 Ford, Lincoln, and Mercury vehicles have an issue with difficult-to-remove spark plugs, which can cause part of the spark plug to become seized in the cylinder head. The source of the problem is a unique plug design that uses a 2-piece shell, which often separates, leaving the lower portion of the spark plug stuck deep in the engine's cylinder head. The 2-piece OE spark plug design is intrinsically flawed, thus making it susceptible to this problem. Ford acknowledges this issue in TSB 08-7-6 as well as earlier TSBs. Ford's TSB does not state that this issue is caused by owner neglect. The TSB provides a special procedure for spark plug removal on these engines. For situations in which the spark plug has partially broken off in the cylinder head, Ford distributes multiple special tools for removing the seized portion of the plug. Their TSB explains the multiple procedures required for handling the different cases/situations that occur when parts of plugs are seized in these engines. This repair is covered for vehicles under warranty; however, the Ford recommended spark plug service interval extends beyond the duration of the New Vehicle Limited Warranty.

 

There are cost effective solutions for the above two conditions.  (For the broken spark plug issue, many technicians found, that the following unapproved procedure worked best for removing the spark plugs.  A pneumatic impact was used on the plugs while the engine was still hot.  Typically, one side was done, the engine restarted and warmed and then the other side or all 8 were removed without installing any of the new plugs.)

 

As variable cam timing was introduced, some engines, some high mileage engines had issues with the cam phasers.  If the phaser went bad, the recommended procedure was to replace the phasers, timing chain, chain guides, chain tensioner and oil pump.  The additional parts were replaced "just in case" because most of the cost was the labor of tearing off the the front engine cover.

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I just know that I wish I had read more about the Triton engine before buying a 06 F150.  We bought a used one with 120K, and had it inspected at a Ford Dealer before purchase. They gave it a clean bill of health, but we didn't drive it 2 months before the Cam Phaser Issue became apparent.  We had to drop over $6K to get the engine replaced. =( Wish I had done more homework.  That said, I am looking at replacing the truck with an Ecoboost.

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