2004 f150 5.4 runs great for about 10 min.

5

Asked by Feb 03, 2015 at 07:30 PM about the 2004 Ford F-150 FX4 4WD

Question type: Maintenance & Repair

After about 10 min. Oil pressure will drop to zero then come right back up. It will do this a
few times then sound like a deisel. Oil pressure will stay down after a while until I
accelerate

7 Answers

20,860

If it is clattering like a diesel then you have an oil distribution problem. Check the pump.

2 of 2 people found this helpful.
5

Thanks for your answer Mark. I was kinda thinking along those lines, just found it odd that oil pressure would be good until it runs about 10 min. These motors are notorious for issues of this type and not sure if it's a cam phaser deal or what

54,585

The cam phaser operation operates on oil pressure. When these engines get many miles on them the oil pressure at idle is lower than designed and this causes issues. I have read that using a 15w40 oil will help, but I do not recommend using oil other than what the manufacturer specifies. Also it is possible that you have a partially clogged oil pickup screen. This could be clogged by sludge, insides of a defective oil filter or debris from the cam tensioner rubbing blocks. In any event this needs to be addressed as you are risking damage to the top end of the engine where the camshafts and valve train reside.

2 of 2 people found this helpful.
5

It's just hard to wrap my brain around the fact that it starts and runs like a champ for 10 min. Oil pressure is,great unt it does that sudden drop, picks back up almost instantly. Even when it flatlines it still picks up when acceleration. So I think between first checking the pickup screen and flush, oil pump is next. I guess changing the oil pump would be a good time to change cam phasers and chain. Any insight on cam bearings at this point?

54,585

No cam bearings, they are a machined surface that is part of the cylinder head and cam retaining caps.

5

How is this issue repaired if can't change bearings?

54,585

Possibly a new oil pump if it is worn or an engine overhaul to put clearances back to factory specs. If the oil pressure is the problem a high output oil pump may solve it. I have a friend that has the same exact problem. He has thrown some parts at it, but been unable to fix it and he just drives it. When he brings up the rpm it is fine.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 239,472 nationwide F-150 listings starting at $1,300.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,280
  • #2
    dandyoun
    Reputation
    4,630
  • #3
    tennisshoes
    Reputation
    3,250
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,714 Great Deals out of 196,520 listings starting at $699
Used GMC Sierra 1500
1,250 Great Deals out of 71,158 listings starting at $1,750
Used Ford F-250 Super Duty
390 Great Deals out of 53,765 listings starting at $1,899
Used Toyota Tundra
686 Great Deals out of 38,171 listings starting at $2,900
Used Dodge Ram 1500
415 Great Deals out of 11,100 listings starting at $1,499
Used Toyota Tacoma
731 Great Deals out of 50,716 listings starting at $1
Used Ford F-350 Super Duty
370 Great Deals out of 28,562 listings starting at $3,300
Used Ford Mustang
605 Great Deals out of 39,041 listings starting at $1,500
Used Chevrolet Colorado
346 Great Deals out of 41,191 listings starting at $1,995
Used Nissan Titan
262 Great Deals out of 20,790 listings starting at $3,800
Used Chevrolet Silverado 2500HD
349 Great Deals out of 33,043 listings starting at $2,499
Used Chevrolet Tahoe
855 Great Deals out of 44,867 listings starting at $1,980
Used Ford Explorer
1,184 Great Deals out of 76,962 listings starting at $2,100

Used Cars For Sale

2018 Ford F-150 For Sale
117,560 listings starting at $17,079
2017 Ford F-150 For Sale
214 Great Deals out of 42,597 listings starting at $17,990
2016 Ford F-150 For Sale
228 Great Deals out of 8,559 listings starting at $16,594
2015 Ford F-150 For Sale
498 Great Deals out of 12,964 listings starting at $11,990
2014 Ford F-150 For Sale
705 Great Deals out of 16,605 listings starting at $9,990

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.