GM 6.2L V8 EcoTec3 Water Pump - Cadillac Escalade / Chevrolet / GMC 6.2L

Overview

A water pump offered for Cadillac Escalade and related Chevrolet and GMC 6.2L applications. Supplied as a replacement engine water pump for the GM L87 6.2L EcoTec3 V8 and the closely related Gen V 6.2L applications noted below. This listing covers the component described here only; hardware such as bolts, seals and gaskets is included only where the specification list says so.

Function

The water pump is the only component moving coolant through the engine and radiator under pressure, so its condition sets how well heat leaves the block. A failing pump usually begins with a weep at the seal, then a bearing rumble, then overheating that is worst at idle and improves with engine speed. On a Gen V V8 the pump sits behind the accessory drive, so a coolant residue trail from the weep hole is the earliest reliable warning.

Specifications as documented

• Component: Engine water pump
• OEM part number: 12685... (OEM number truncated in captured title)
• Engine: 6.2L Gen V V8 flagged in listing match
• Model years: Not stated in captured listing data
• Package contents: 1 x water pump (gasket inclusion not confirmed)

Compatibility

Engine: 6.2L Gen V V8 flagged in listing match. Vehicle applications recorded for this part: Cadillac Escalade, Chevrolet and GMC applications as stated by supplier. Model years: Not stated in captured listing data. OEM reference: 12685... (OEM number truncated in captured title). Fitment status recorded at the time of listing: supplier-declared vehicles - oem number truncated, not resolvable.

Installation

Drain the cooling system before removal and check the mating face on the timing cover for pitting or old sealant. Fit a new gasket dry unless the manufacturer specifies otherwise, torque the fasteners evenly in sequence, and refill with the specified coolant at the correct concentration. Bleed the system properly, run a full heat cycle with the heater open, and re-check the level once the engine is cold.

Fitment notice

Compatibility is stated for the GM L87 6.2L EcoTec3 V8 on the strength of the supplier listing and, where an OEM number is published, a parts-catalogue cross-check. GM built the 6.2L V8 in several forms, and L86, LT1, LT2 and LT4 components are not automatically interchangeable with L87 parts. Before ordering, confirm the engine RPO code and the original part number against the vehicle, and treat this listing as a guide rather than a substitute for that check. Specialist engine repairs should be carried out by a qualified technician.