Air pump belt. Porsche 911 3.2L 1978-89  ❭  90019200550

OE Match air pump belt for Porsche 911 applications from 1978–1989. This narrow V-belt has the supplied dimensions of 9.5 x 975 and is intended for the air injection pump drive.

Fits:
Porsche 911 3.2L 1978 - 1989

Diagram ref no 35

Diagram: 108-00, item 34 — 911 SC 1978–83
Diagram: 108-00, item 35 — 911 Carrera 930.26 1987-89
Diagram: 108-00, item 35 — 930.26 (AUS) (CH) (S) 1984–86

What This Product Does

The belt provides the mechanical drive to the air injection pump. It is an auxiliary drive component, rather than a belt used to control valve timing. Correct specification and adjustment are important when renewing it.

Functions

• Transfers drive through the air pump pulley system.
• Provides a replacement for an aged, damaged or slipping air pump belt.

Technical Details

• Belt construction: narrow V-belt.
• Supplied dimensions: 9.5 x 975.

Symptoms of Fault

• Squealing during starting or changes in engine speed.
• Cracks, splitting, frayed edges or a shiny belt surface.
• Belt dust near the pulleys or visible signs of slipping.
• Fluid contamination affecting the belt surface.

Why Replacement Matters

Age, heat and contamination can deteriorate a drive belt even when the car covers few miles. Renewing a worn belt addresses deterioration in the pump drive, but associated pulley condition, alignment and adjustment should also be checked. A replacement belt alone will not correct a damaged pulley or a binding pump.

FAQs

What should be checked before fitting?
Match the vehicle details and belt dimensions, then inspect the pulleys for damage, contamination and alignment.

Why might a replacement belt still squeal?
Incorrect adjustment, pulley misalignment or contamination may remain. Identify the cause rather than simply increasing belt tension.

Can excessive tension cause problems?
Yes. Use the adjustment procedure specified for the vehicle; overtightening can place unnecessary load on the driven components.