Belt condition
Visible cracks, glazing, contamination, missing ribs, frayed edges and incorrect tracking are checked against the vehicle’s belt layout.
Belt-drive diagnosis
Auxiliary Drive Belt Diagnosis & Replacement in South London
Squealing, cracking, frayed edges or a belt that has come off needs more than a quick parts guess. SP88 checks the belt, tensioner, idlers and accessible driven pulleys before recommending suitable replacement.
South London & nearby SurreyWeekdays: 10:00, 12:00 or 14:00Weekends closed
What SP88 checks before fitting a belt
An auxiliary or serpentine belt may drive the alternator, air-conditioning compressor, power-steering pump or water pump depending on the vehicle. The failed part may be the belt, but it may also be something the belt runs around.
Tensioner and idlers
A weak or seized tensioner, rough idler bearing or misalignment can destroy a new belt. Accessible components are checked before parts are ordered.
Driven components
Where accessible, pulleys are checked for roughness, play or seizure. Charging and steering symptoms are considered alongside the belt condition.
Correct routing and specification
Belt length, rib count and routing vary by engine. Parts are matched to the registration and engine details rather than assumed.
How the visit works
Describe the symptom
Tell us when the noise began, whether a warning light appeared and whether the belt is still fitted.
Inspect and confirm
SP88 checks the belt path and accessible pulleys, then explains whether a belt-only repair is reasonable.
Fit and recheck
Where suitable, the correct belt or related accessible component is fitted and tracking is checked before handover.
Stop if the belt is damaged or has come off
A broken or displaced belt can stop charging and, on some engines, coolant circulation or power steering. Switch off safely if the temperature rises, steering becomes heavy or the battery warning light stays on. Do not run the engine with loose belt material near the timing-belt area.
Mobile where suitable, workshop when necessary
Straightforward belt and accessible tensioner work may be possible at the vehicle. Restricted access, seized fasteners, damaged crank pulleys or a need for major strip-down may require workshop work. Air-conditioning system work is outside this page.
Questions customers ask
Is a squeal always the belt?
No. A tensioner, idler, pulley, contamination or misalignment can create a similar noise. The source should be checked before fitting parts.
Can you fit a belt at my home or workplace?
Often, when access and conditions are safe. Some vehicles need lifting, specialist locking procedures or workshop access.
Do you replace timing belts on this page?
No. This page covers external auxiliary-drive belts. Timing-belt work is a separate engine-timing service and must not be confused with it.
Can I keep driving with a cracked belt?
It is not sensible to rely on a visibly damaged belt. Failure can remove charging and other driven functions without warning.
Send the vehicle details before booking
Include the registration, make and model, postcode and the symptoms. That helps SP88 check likely access, parts options and whether the first visit should be mobile diagnosis or workshop work.