Drastic drops/returns of oil pressure (5.4L 3v 2009)

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

proftomda

Well-Known Member
Joined
Dec 1, 2014
Posts
53
Reaction score
26
Location
georgia
First off the oil pressure gauge indicates normal mid range at 7 psi so it’s pretty much useless as a indicator of good oil pressure. May want to look into mechanical gauge hook up to verify your concern.

My guess is at 190,000 miles, your timing chain guides have started to break apart and fall into your oil pan and partially clogging oil pickup tube.

I personally would replace the oil pressure sending unit because so cheap. If problem persists with new sensor, I would then look into a complete Timing job or engine replacement.
 

mbtech2003

Full Access Members
Joined
Oct 26, 2017
Posts
118
Reaction score
53
Location
capecod
Full Timing job and pull the oil pan and clean it out. But before you do that. Pull one of the cam bearings off and make sure it’s good. Also what oil filter do you use. I’ve had more ecoguard filters clog up in 2-3 k miles. They are junk. Stick with OEM, Mann or Hengst. My 05 I run with 5-w30. It has 195k miles or so. My wife’s 2010 I use 5-20. But it only has 145k.
 

Latest posts

Staff online

Forum statistics

Threads
54,136
Posts
506,229
Members
48,078
Latest member
Wayneo
Top