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Recipe - Ford 6.4L Power Stroke Diesel

Specific Fix build

Reliability tier: aggregated - verify before ordering, see /disclosure/

The K16 high-pressure pump event (mode High-pressure pump (Siemens K16) destruction): the 6.4's signature catastrophic failure. Internal pump wear sheds metal into the entire fuel rail - the pump replacement alone is NOT the repair. The full response is flush the system, replace the pump, and assess/replace injectors downstream, or the new pump eats the same meal.

Parts

• 6.4L Power Stroke High-Pressure Fuel Pump (Siemens K16), Ford reman - reman K16 high-pressure pump (8C3Z-9A543-DRM) - the core replacement (qty 1)
• 6.4L Power Stroke 6.4L Fuel System Flush / Cleaning (post-K16 failure) - flush the rails/lines/tank before the new pump runs - skip this and the pump dies again (qty 1)
• 6.4L Power Stroke Fuel Injector (Siemens piezo), Ford reman - injectors downstream of the event: assess balance rates; replace where metal passed (qty 1)
• 6.4L Power Stroke Fuel Filter Element (OEM) - fresh filters at final fill (qty 1)

Install order

1. confirm the event: metal in the primary filter, rail-pressure faults, chips in the sample
2. drop and flush the tank, replace all filters, flush rails and lines
3. replace the K16 pump
4. assess injectors (balance rates/cut tests); replace the affected set
5. prime, verify rail pressure, short interval oil change to clear any fuel dilution

Expected outcome

Rail pressure stable, no repeat metal generation.

Do not

• do not install a new K16 into an unflushed system - the most expensive way to buy the same failure twice

Parts budget

About $2,100-$2,400 in parts, plus parts we have no price for. It depends on what the diagnosis finds; each option below is what you buy together. Prices marked "at Dave's" are Dave's Auto Center's, the same as in his store; the others are approximate prices from OEM and maker catalogs, rounded (a manufacturer's list price can run higher). Parts only, no labor.

• about $2,100 plus parts we have no price for: 6.4L Power Stroke High-Pressure Fuel Pump (Siemens K16), Ford reman (about $1,950) + 6.4L Power Stroke 6.4L Fuel System Flush / Cleaning (post-K16 failure) (no price yet) + 6.4L Power Stroke Fuel Filter Element (OEM) (about $120)
• about $2,400 plus parts we have no price for: 6.4L Power Stroke High-Pressure Fuel Pump (Siemens K16), Ford reman (about $1,950) + 6.4L Power Stroke 6.4L Fuel System Flush / Cleaning (post-K16 failure) (no price yet) + 6.4L Power Stroke Fuel Injector (Siemens piezo), Ford reman (about $320) + 6.4L Power Stroke Fuel Filter Element (OEM) (about $120)

DIY or shop: Shop: contamination cleanup is a shop-grade job with real consequences for shortcuts.