Cloyes s-431
Timing crankshaft sprocket with 21 teeth for a single-row chain in selected Ford V8 engines.
Cloyes S-431 is a timing crankshaft sprocket for a stock-style single-row timing drive in selected Ford V8 engines. It has 21 teeth, a precision-machined keyway and one timing index mark.
Application / fitment
S431 is catalogued for selected Ford Windsor 289, 302 and 351W engines as well as some 255 V8 applications. It is used in the Cloyes C-3014K set together with the S406T camshaft sprocket and C358 chain. Fitment must be confirmed by chain width, sprocket offset, fuel-pump eccentric design and engine version.
- part type: timing crankshaft sprocket
- selected engines: compatible Ford 255, 289, 302 and 351W V8 versions
- drive: stock-style single-row chain, approximately 0.61" wide
- example vehicle makes: Ford, Lincoln and Mercury
- cross references: D5OZ-6306-A, Melling S431, MAHLE S-431, INA ZS-S431
Before installation, compare tooth count, width, timing-mark position and offset with the removed sprocket. Inspect the complete timing drive and replace the mating chain and sprockets when wear is present.
Technical information
- tooth count: 21
- chain rows: 1
- bore diameter: approximately 1.38" / 35.1 mm
- outside diameter: approximately 2.51" / 63.8 mm
- overall width: approximately 0.84" / 21.3 mm
- tooth width: approximately 0.40" / 10.2 mm
- material: metal with heat-treated teeth
- timing adjustment: no; one keyway
- sale unit: 1 sprocket