← Oil leak / consumption on all engines
Symptoms · 6.4 Power Stroke (2008-2010)
6.4 Power Stroke (2008-2010): oil leak, oil consumption or rising oil level
4 documented failures on this engine list this among their signs. They are ordered from the most widespread down. Each one shows the signs in its record's own words, how to tell it from the others, the usual fix and any recall or bulletin.
Not sure which engine you have, or want the recalls for your exact truck? Check your VIN: it names the engine and lists the campaigns for that model year. Whether a recall is still open on your VIN: nhtsa.gov/recalls.
verified
How widespread: Common
9 NHTSA owner complaints match it, out of 133 checked
How it shows up
- oil traces in the exhaust/downpipe; oil wetting the DPF inlet
- oil consumption without external leaks; boost whine change
Its other signs
- secondary: DPF ash-loading accelerates from the oil
How to tell it apart
- inspect the downpipe/DPF inlet for oil wetting
- end-play check on both turbo stages; check charge side for oil too (seal direction tells the stage)
- rule out pedestal-level leaks (6.0/7.3 pattern) - the 6.4's leak points differ
Usual fix
reman/replace the turbo set (both stages as one decision on a compound system)
Recalls and bulletins
TSB 20228
Root cause, parts and sources →
verified
How widespread: Common
8 NHTSA owner complaints match it, out of 133 checked
How it shows up
- oil consumption rising; blue smoke
Its other signs
- rough running / power loss on #7 or #8; engine replacement conversations
- fuel-diluted oil history (failed regens) precedes it
How to tell it apart
- track oil level/consumption trends; lab oil analysis for fuel %
- cylinder-balance test + compression/leak-down when a hole drops out
- inspect for failed-regen patterns (aborted regens, city duty) before blaming hardware
Usual fix
engine-level decision: reman/used long block vs rebuild with upgraded rings/pistons (state cost tier explicitly in recipes)
Root cause, parts and sources →
verified
How widespread: Occasional
1 NHTSA owner complaints match it, out of 133 checked
How it shows up
- milky oil / rising oil level (coolant entering the crankcase via the eroded cover)
Its other signs
- external coolant seep at the front cover in earlier stages
- overheating history; low-coolant top-ups precede it
How to tell it apart
- milky oil / oil-analysis for coolant metals = advanced; check the front cover externally first
- pressurise the cooling system and inspect the crankcase/oil for entry
- ultrasound the cover thickness at rebuild time
Usual fix
engine-level: replace/rebuild with a repaired cover (specialist service exists); at rebuild, treat SCA/coolant discipline as mandatory
Root cause, parts and sources →
aggregated
How widespread: Occasional
How it shows up
- oil consumption via guides; blue smoke at startup in advanced cases
Its other signs
- valve seat/guide wear found at top-end service
- long-run risk: dropped valve damage
How to tell it apart
- top-end inspection at rebuild; guide-to-stem clearance measurement
- watch oil consumption/vapor traces as leading indicators
Usual fix
at head service: bronze-guide lining/replace guides (specialist), or reman head
Root cause, parts and sources →
Other symptoms on the 6.4 Power Stroke (2008-2010)
Hard start, long crank or no-startLoss of power, limp mode or derateBlue or gray smoke (burning oil)Losing coolantOverheating or temperature creeping upTicking, knocking, rattle or whineMisfire, rough idle, hesitation or surging
Everything on the 6.4 Power Stroke (2008-2010)Its recalls and bulletins