Recipe - Ford 6.7L Power Stroke Diesel (Scorpion)

Reliability build

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

Preventive measures against the CP4.2 contamination cascade (CP4.2 high-pressure fuel pump contamination cascade) and the separately-documented plastic fuel-filter-housing cracking issue (Low-pressure fuel supply weakness (lift pump, filters, water-in-fuel)) - cheap insurance against the platform's single costliest failure mode, applicable across all three generations since the CP4.2 pump has been used throughout (an aftermarket parts maker's 6.7L Power Stroke guide, a parts retailer's 6.7L Power Stroke guide).

Parts

6.7L Power Stroke Billet Fuel Filter Housing / Leak Prevention Kit (S&S Diesel Motorsport) - replaces the factory PLASTIC fuel filter housing (known to crack with age) with a billet-aluminum housing at roughly double the OEM dirt-holding capacity (23g vs 12g) at the same 4-micron/99% filtration spec - addresses a documented failure point before it starts leaking, not just a performance upgrade (qty 1)

Install order

replace the OEM plastic fuel filter housing with a billet unit at a routine filter-change interval, before any cracking is visible
adopt a fuel-quality discipline going forward: run a lubricity additive with every tank, buy from high-turnover stations, drain the water separator promptly on any warning (per both cited vendor guides)

Expected outcome

Reduced exposure to the two documented low-pressure-side weak points (housing cracking, contamination reaching the CP4) without changing anything about the high-pressure pump itself - this is risk reduction, not a fix for an already-failed pump.

Do not

do not treat a preventive kit as a substitute for fuel-quality discipline - the kit addresses housing durability and, per some vendor products, pump-failure debris routing; it does not make the pump immune to fuel-quality-driven wear
do not skip the water separator warning light repeatedly - water is the CP4's most direct enemy per every cited source

Parts budget

$300.00 in parts at Dave's Auto Center. 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.

$300.00: 6.7L Power Stroke Billet Fuel Filter Housing / Leak Prevention Kit (S&S Diesel Motorsport) ($300.00 at Dave's)

DIY or shop: Either: a fuel filter housing swap is within reach of a confident DIYer with basic diesel fuel-system safety practice; a shop job is equally reasonable for owners who prefer it.