How do you relieve serpentine belt tension on the Ford 5.0L/5.8L?

Per the decal, lift counterclockwise using the idler pulley bolt to relieve tension (using a wrench/ratchet on the bolt as shown in the illustration).

What pulleys does the drive belt route around on the 5.0L and 5.8L?

The diagram shows the belt routing around the alternator, idler pulley, tensioner, air pump, fan, crankshaft, A/C compressor (or idler on non-A/C trucks), and power steering pump.

Which engines does this belt routing diagram apply to?

The label states it covers 5.0L & 5.8L drive belt installation (Moteur 5,0 L ou 5,8 L).

What is the Ford part number on this belt routing decal?

F3TA-8B656-BA is printed along the right edge of the label.

What if my truck doesn't have air conditioning?

The diagram labels one pulley as 'A/C OR IDLER,' indicating an idler pulley takes the place of the A/C compressor on non-A/C vehicles.

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Ford 5.0L & 5.8L Serpentine Belt Routing Diagram - Bronco Drive Belt Decal

Ford drive belt routing diagram label for 5.0L and 5.8L engines showing pulley layout

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Serpentine drive belt routing diagram for Ford 5.0L and 5.8L engines with idler-tensioner instructions.

AI caption November 2011 · Photo 393 of 3001

This is a bilingual (English/French) factory underhood decal showing the serpentine drive belt routing for Ford 5.0L and 5.8L V8 engines, photographed on a vehicle identified by the uploader as a 1994 Ford Bronco. The label diagrams the belt path around eight pulleys: alternator (ALT.), idler pulley, belt tensioner, air pump (Thermactor/smog pump), engine fan, crankshaft, A/C compressor (or idler pulley on non-A/C vehicles), and power steering pump. An illustration shows a hand using a ratchet/wrench on the idler pulley bolt, with the instruction to lift counterclockwise using the idler pulley bolt to relieve belt tension when installing or removing the belt. All labels and instructions are repeated in French (e.g., POULIE FOLLE, TENDEUR, POMPE À AIR, VENTILATEUR, VILEBREQUIN, CLIM., DIR.). The decal carries Ford part number F3TA-8B656-BA. A reader can learn the correct serpentine belt routing sequence for these engines and the proper method for releasing tensioner pressure during belt replacement. The label is weathered with some paint/rust damage obscuring small portions of the belt path near the top right, but all text remains readable.

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Frequently asked questions

How do you relieve serpentine belt tension on the Ford 5.0L/5.8L?: Per the decal, lift counterclockwise using the idler pulley bolt to relieve tension (using a wrench/ratchet on the bolt as shown in the illustration).
What pulleys does the drive belt route around on the 5.0L and 5.8L?: The diagram shows the belt routing around the alternator, idler pulley, tensioner, air pump, fan, crankshaft, A/C compressor (or idler on non-A/C trucks), and power steering pump.
Which engines does this belt routing diagram apply to?: The label states it covers 5.0L & 5.8L drive belt installation (Moteur 5,0 L ou 5,8 L).
What is the Ford part number on this belt routing decal?: F3TA-8B656-BA is printed along the right edge of the label.
What if my truck doesn't have air conditioning?: The diagram labels one pulley as 'A/C OR IDLER,' indicating an idler pulley takes the place of the A/C compressor on non-A/C vehicles.