Flywheel Locking Tool for Ford EcoBoost / EcoBlue / Duratec – as 303-1643

This flywheel locking tool is designed to securely lock and hold the flywheel during engine service operations. It is essential for safely loosening and tightening high-torque crankshaft bolts, especially on modern Ford engines.

Design & Operation

The tool is installed in place of the starter motor and acts as a mechanical lock against the flywheel ring gear.

• Mounted using the original starter mounting points
• Locking tooth engages directly with the ring gear
• Adjustable locking block allows precise positioning
• Can be disengaged quickly for engine rotation or timing checks

Application

Used during:

• Crankshaft pulley bolt loosening and tightening
• Timing chain and timing belt service
• Engine repair and maintenance
• Engine rotation and timing verification

Important Notes

• Required for engines with extremely high torque specifications
• Designed according to OEM geometry—no need for spacers or washers
• Prevents risk of components falling into the transmission housing
• For engine rotation, simply disengage the locking block from the ring gear

Compatibility – Engine Codes

Ford Duratec 1.2L:
B1KE, C12FDOS, ENAP, ENBI

Ford Duratec 1.5L:
XZJF, Y2DA

Ford EcoBoost 1.0L:
B3DA, B3GA, B3GB, B7DA, B7DC, B7JA, B7JB, BZJA, M0DC, M0JA, M0JB

Ford EcoBoost 1.5L:
C15FDOS, XZJF, Y1DA, Y2DA, YZDA, YZDB, YZJA

Ford EcoBlue 2.0L:
BCCA, BCCB, BCCC, BCCD, BCDA, BCFA, BCFB, BCFC, BCFD, BCRA, BJFA, BJFB, BJFC, BJFD, BJRA, BJRB, BKFA, BKFB, BKFC, BKFD, BKRA, BKRB, BLFA, BLFB, BLFC, BLFD, BLHA, BLRA, BLRB, YLCA, YLCB, YLCC, YLDA, YLF6, YLFA, YLFB, YLFS, YLR6, YLRA, YMCA, YMCB, YMCC, YMF6, YMFA, YMFB, YMFS, YMHA, YMR6, YMRA, YNCA, YNF6, YNFA, YNFB, YNFS, YNHA, YNR6, YNRA

Additional Engine Codes:
M1DA, M1DD, M2DA, M2DC, M2GA, M2GB, SFCB, SFDA, B7JC, B2KA

Reference Numbers

Used as:

• Ford: 303-1643
• Ford: 3031643

The OEM reference numbers are for identification purposes only. This tool is not an original OEM product.

FORD C-MAX II (DXA/CB7, DXA/CEU) (04.2010 - 12.2014) 1.0 EcoBoost (100 HP, 74 kW)

FORD C-MAX II (DXA/CB7, DXA/CEU) (04.2010 - 12.2014) 1.0 EcoBoost (125 HP, 92 kW)

FORD FIESTA VII (HJ, HF) (05.2017 - ) 1.0 EcoBoost mHEV (125 HP, 92 kW)

FORD FOCUS IV (HN) (01.2018 - ) 1.0 EcoBoost (101 HP, 74 kW)

FORD FOCUS IV (HN) (01.2018 - ) 1.0 EcoBoost (125 HP, 92 kW)

FORD FOCUS IV (HN) (01.2018 - ) 1.0 EcoBoost mHEV (125 hp, 92 kW)

FORD FOCUS IV Saloon (HM) (11.2018 - ) 1.0 EcoBoost (101 hp, 74 kW)

FORD FOCUS IV Saloon (HM) (11.2018 - ) 1.0 EcoBoost (125 hp, 92 kW)

FORD FOCUS IV Estate (HP) (09.2018 - ) 1.0 EcoBoost (100 hp, 74 kW)

FORD FOCUS IV Estate (HP) (09.2018 - ) 1.0 EcoBoost (125 hp, 92 kW)

FORD KA+ (UK, FK) (08.2014 - 12.2018) 1.2 (70 hp, 51 kW)

FORD PUMA (09.2019 - ) 1.0 EcoBoost (95 hp, 70 kW)

FORD PUMA (09.2019 - ) 1.0 EcoBoost mHEV (125 hp, 92 kW)

FORD PUMA (09.2019 - ) 1.0 EcoBoost mHEV (155 hp, 114 kW)

FORD TOURNEO CONNECT / GRAND TOURNEO CONNECT V408 MPV (09.2013 - ) 1.0 EcoBoost (100 hp, 74 kW)

FORD TRANSIT CONNECT V408 Panel Van/MPV (02.2013 - ) 1.0 EcoBoost (100 hp, 74 kW)