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Ford Duratec ST
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Ford Duratec ST
Verdict
RISKY · 40/100
Est. cost /3yr
€2,000-4,500 over 3 years depending on turbo and timing belt service history at purchase
Oil interval
8,000 km
Recalls
0
Worst issue
Timing Belt Failure (Interference Engine)
CRITICAL
Ford Duratec ST
Mk2 · Mk2 ST
Timing Belt Failure (Interference Engine)
€400-900 for proactive belt and water pump replacement; €2,500-4,500+ for a rebuild or replacement engine if the belt snaps or jumps
CRITICAL
Turbo Failure Due to Oil Feed Blockage
€800-2,500
CRITICAL
Blue Smoke on Deceleration, Valve Stem Seals or Piston Rings
€300-1,200
HIGH
Boost Issues After Tuning or Filter Changes
€100-600
MODERATE
Downpipe Cracking
€100-400
LOW
Ford Duratec ST
Mk2 · Mk2 ST
•Confirm documented timing belt and water pump replacement with date, mileage and invoice, do not accept verbal assurance, this is the single most important check on this engine
•Check for blue smoke on cold start and during a hard deceleration run, indicates valve seal or ring wear
•Scan OBD for boost and turbo related fault codes; confirm no limp mode history
•Inspect the turbo oil feed pipe and surrounding area for sludge, carbon deposits, or evidence of prior turbo replacement
•Ask for full service history with evidence of oil changes at or below 8,000 km intervals using correct 5W-30 fully synthetic oil
•Inspect the downpipe for cracks, weld failures, or soot staining, especially on any modified or tuned examples
Ford Duratec ST
Mk2 · Mk2 ST
Timing belt and water pump
Replace proactively if no documented service within the last 100,000-150,000 km or 10 years, regardless of indicated condition, given interference engine design
100,000-150,000 km
Turbocharger oil feed pipe
Inspect and flush or replace; check for carbon or sludge blockage before any turbo replacement
50,000 km
Injector seals (particularly no.3 cylinder)
Inspect for carbon leakage into engine oil; replace worn seals to prevent oil contamination and turbo starvation
60,000 km
Valve stem oil seals
Replace if blue smoke is observed on deceleration or cold startup
100,000 km
Downpipe
Inspect welds and joints for cracking; replace with an uprated item if cracked
80,000 km
Ford Duratec ST
Mk2 · Mk2 ST
No recalls on record
Ford Duratec ST
Mk2 · Mk2 ST
✓Strong torque delivery and a distinctive inline-5 exhaust note that owners rate highly
✓Good parts availability and a large, active tuning and support community
✓Bottom end is fundamentally robust and copes well with moderate tuning if oil feed and belt maintenance are kept up
✓Consumer reliability data supports solid overall Focus Mk2 mechanical reliability outside of the known turbo and belt weak points
✓Responds well to tuning when supporting modifications and maintenance are done correctly
Ford Duratec ST
Mk2 · Mk2 ST
Real consumption
9.6 L/100km
Official consumption
Not available
Oil interval
8,000 km
Oil spec
5W-30 fully synthetic meeting Ford WSS-M2C913 specification
Est. cost /3yr
€2,000-4,500 over 3 years depending on turbo and timing belt service history at purchase