V10 worth it???

[drewkeen]

I bought an 01 model truck with just 160k on it and a v10 engine that is messed up bad. Of course, I bought an 03 model with a 5.4 in it and 302k miles on it. Both had locked up motors...put starters on both and got them to run. The 5.4 ran fine (needed a tune up though) and the v10 smokes like a freight train and has no oil pressure. It is probably hit and miss.

[dockrocker]

Originally Posted by diesel_brad

The V-10 engines made before 2005 had an issue with the spark plugs sometimes blowing out due to the high compression and high rev's. They fixed that issue by making deeper threads for the spark plugs. Also, in 2006, they uped the HP to 365, and along with the Torqueshift tranny, is one heck of a combo.


I thought 05 had the 365hp engine too

I believe the 97-98 V-10 had 275 hp / 420 tqu, the 99(?)-04 V-10 also had 2 valves/cylinder and put out 310 hp / 425 tq. In 2005 Ford went with a 3 valve/cylinder head on the V-10, bumping it to 362 hp and 450 or so tq.

I had a 2005 F-250 with the 3 valve and it was heck of a truck. Pulled a 29' offshore boat with no issues at all. I miss it every day - had some lifestyle changes that left no place for a 10-12 mpg truck.

[akrewat]

For anyone wondering about the spark plug issues on the V10, or the 5.4 and 4.6 for that matter:

December 1996 - 4.6L 4V alignment feature added
February 1997 - 4.6L 2V head alignment feature added
September 2000 - WEP (Windsor Engine Plant) 2V head alignment feature modified (4.6/5.4/6.8)
November 2002 - WEP introduced long thread heads on 2V (all)
May 2003 - REP (Romeo Engine Plant) introduced long-thread heads on 4V 4.6 and 5.4
November 2003 - REP introduced long-thread heads on 2V and modified alignment feature

In 1999, and 2001, an interim fix was done for a cross-threading issue.
Original process:

Step 1 - Zero torque spark plug (air tool)
Step 2 - Torque to 16-20Nm final torque (DC Run down), monitor at 6-12Nm, and final torque must be reached within 0-360 degrees.

New process (addressed the possibility of applying installation torque for more than 25 degrees of rotation)
Step 1 - Zero torque spark plug (air tool)
Step 2 - Torque to 16-20Nm final torque (DC Run down) start monitor at 6-12Nm, and final torque must be reached within 3-25 degrees.

Another action to address cross-threading was the addition of an alignment feature to lead the plug into the hole.