Parts for your 1987 Suzuki Swift-Drive belt tensioner

1987 Suzuki Swift drive-belt-tensioner — is it used?

For the 1987 Suzuki Swift (SA310/Cultus), a modern spring‑loaded drive-belt tensioner isn’t used. Technical references including the Suzuki Swift/SA310 Factory Service Manual (1986–1988, Engine section—Drive Belts), the Suzuki Electronic Parts Catalogue for G10 (1.0L) and G13 (1.3L) engines, and common workshop guides (Haynes/Chilton covering mid‑80s Cultus/Swift/Metro) show conventional V‑belts with manual adjustment. Belt tension is set by moving the alternator (and power steering pump where fitted) on slotted brackets. Air-conditioning systems of the era use an adjustable idler pulley with a lock and adjuster screw—again, not a spring‑loaded automatic tensioner.

Why it’s not used comes down to the belt layout. Early Swifts run individual V‑belts for the alternator and optional accessories, not a single serpentine belt. Automatic tensioners became common later with serpentine setups, in ’87 Suzuki simply relied on adjustable brackets and a manual process to set belt tension. It’s simple, cheap, and works well when adjusted correctly.

What owners need to do instead is keep an eye and ear on the belts. If there’s squeal on cold start, dimming lights at idle, or cracking and glazing on the belt, it’s time for an adjustment or a fresh belt. Tension is set by loosening the alternator pivot and slider bolts, levering the alternator out to achieve proper belt deflection, then tightening the bolts. For A/C, the idler pulley adjuster is turned to set tension, then the locknut is secured. After fitting a new belt, recheck tension after a few short trips as it can bed in and slacken slightly.

• No separate spring‑loaded drive-belt tensioner unit is fitted on 1987 Swift G10/G13 engines.
• Tension is adjusted via the alternator (and power steering pump if fitted) slotted brackets, A/C uses an adjustable idler pulley.
• Inspect belts and pulleys for wear, noise, fraying, or wobble, replace belts that show cracks or glazing.
• Avoid over‑tightening, excessive tension can wear alternator and water pump bearings.

Technical references: Suzuki Factory Service Manual (1986–1988 Swift/SA310, Drive Belt section), Suzuki EPC diagrams for G10/G13 accessory drives, and period Haynes/Chilton manuals confirm manual belt adjustment with no automatic tensioner on this model year.

Does a 1987 Suzuki Swift have a drive-belt tensioner?

No. The ’87 Swift uses manually adjusted V‑belts. Tension is set by moving the alternator (and the power steering pump if fitted) on slotted brackets, and any A/C belt is tensioned by an adjustable idler—not a spring‑loaded tensioner.

How do you correctly tension the belts on a 1987 Swift?

Loosen the alternator pivot and adjustment bolts, lever the alternator outward to achieve proper belt deflection, then tighten the bolts. For A/C, turn the idler adjuster until tension feels right, then lock it. After a short drive, recheck tension as new belts can settle. If unsure of the spec, follow the deflection guidance in the factory manual.

Can an automatic tensioner be retrofitted?

There isn’t a factory retrofit. Aftermarket conversions are uncommon and usually not worth the hassle. The stock setup works well if the belts, pulleys, and brackets are in good nick and adjusted with care.