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Author Topic: Lead on a box truck maintenance site ?  (Read 912 times)

Adam Kane

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Re: Lead on a box truck maintenance site ?
« Reply #10 on: March 12, 2019, 05:08:03 pm »

My brother had that same engine in his Ford truck.
 Went to have a standard spark plug change done, cost him over $2,000 because the spark plugs had seized in the head.
 The mechanic stated that if Ford would have put anti seize on the threads this would never have happened to so many engines.
 yay Ford👎
                        Go Toyota

He got ripped off if they charged him $2000. They have a fairly inexpensive tool that extracts broken plugs from those exact heads. I did it myself on four stuck plugs. Each one took me about 20-minutes and two of those were the hardest to reach cylinders.

That said, the 5.4 is a solid engine. I've owned many and all had well over 200k miles when I sold them. Lots of torque down low where it counts. My personal vehicle has one with 258 on it. I checked compression when I changed plugs last time at 230k and all cylinders were nearly perfect. Taken care of, they should give you very few problems. A Ford mechanic friend of mine says he's opened them up to rebuild after 300k and the cylinder walls still have near-perfect cross-hatch patterns still visable.

One trick: if you have a 3-valve version (yours should be), use 5-30 full synthetic. The factory spec of 5-20 was to satisfy CAFE/mpg standards, but the cam phasers are much happier/quieter/perform better with 5-30.
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Mal Brown

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Re: Lead on a box truck maintenance site ?
« Reply #11 on: March 12, 2019, 09:58:48 pm »

Will have to ask Andy, my mechanic.  And make that suggestion.
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Bass player, sound guy.
Fb Gorge Sound and Light
WillyandNelson.com

Paul G. OBrien

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Re: Lead on a box truck maintenance site ?
« Reply #12 on: March 13, 2019, 09:28:37 pm »

if you have a 3-valve version
3V motor was never installed in these vans... won't fit.
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Adam Kane

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Re: Lead on a box truck maintenance site ?
« Reply #13 on: March 14, 2019, 10:35:55 am »

3V motor was never installed in these vans... won't fit.

You are correct...forgot about that.

On the 2v 5.4's the plug issue was primarily blow-outs. Most of the time, it was after a plug change and someone over-tightened them which destroyed the very few threads in the head (bad design). 15 lb-ft is plenty...any more than that and you damage the threads. A small dab of anti-sieze prevents thread damage the next time they're removed.
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Chris Hindle

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Re: Lead on a box truck maintenance site ?
« Reply #14 on: March 14, 2019, 12:30:55 pm »

You are correct...forgot about that.

On the 2v 5.4's the plug issue was primarily blow-outs. Most of the time, it was after a plug change and someone over-tightened them which destroyed the very few threads in the head (bad design). 15 lb-ft is plenty...any more than that and you damage the threads. A small dab of anti-sieze prevents thread damage the next time they're removed.
Heli-Coils are your friend... and a LOT of grease on the tool......
Chris
(Never had this one, but GM had plenty of "adventures" with questionable engineering.)
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Ya, Whatever. Just throw a '57 on it, and get off my stage.

Mal Brown

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Re: Lead on a box truck maintenance site ?
« Reply #15 on: March 14, 2019, 05:05:01 pm »

Heli-Coils are your friend... and a LOT of grease on the tool......
Chris
(Never had this one, but GM had plenty of "adventures" with questionable engineering.)

Yes, well for our personal vehicles it is Subaru Outback and Toyota Highlander AWD.  We do live in the middle of the Cascade Mtn range so snow is a thing here...  my last vehicles before the Highlander were all outbacks.
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Bass player, sound guy.
Fb Gorge Sound and Light
WillyandNelson.com
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