Mar-24-2018 02:57 PM
Mar-25-2018 10:50 PM
3 tons wrote:MikeJinCO wrote:
Our local motor rebuilder has had several modular block Fords in and thinks one of the major problems on the 3 valve motor is that the variable cam timing mechanisms can get all gummed up from either not changing oil or going to dealers for the super cheap oil changes with unknown oil quality. These new motors are very complex compared to the old small block Chevy or Ford.
Agree, staying with the factory spec oil is critical on any engine with variable cam phasers, else a valve failure can await...Fords 4.6 3 valve V8 is also is a candidate for spark plug failure... One would think that as many engines over the years that Ford has build they’d know how to rectify and this issue....My 07 Shelby ‘garage queen’ has only 10.8 k miles on the clock and the thought of a plug thread failure scares me...
Mar-25-2018 10:44 PM
Mar-25-2018 07:03 PM
MikeJinCO wrote:
Our local motor rebuilder has had several modular block Fords in and thinks one of the major problems on the 3 valve motor is that the variable cam timing mechanisms can get all gummed up from either not changing oil or going to dealers for the super cheap oil changes with unknown oil quality. These new motors are very complex compared to the old small block Chevy or Ford.
Mar-25-2018 06:28 AM
Mar-24-2018 05:38 PM
MitchF150 wrote:
Spark blow out was mostly on the 97-03 5.4 engines. Then Ford went to the 5.4 3v (3 valve) version and those had those really long, 2 piece plugs that would break if you tried to remove them after 100k miles..
Sounds like just a 'time-sert' fix.. Sure, a quick fix, and i've never had to do one, so no comment there.. Just what I've read on the interweb and, well... There you go..
Good luck!
Mitch
Mar-24-2018 04:38 PM
Mar-24-2018 03:47 PM
ScottG wrote:
I would suggest doing them all at the same time.
A friends brother has been left stranded 3 times because he only has the hole fixed that failed.
Mar-24-2018 03:36 PM
Mar-24-2018 03:05 PM