Performance Water Pump Timing Chain & Head Gasket Kit for Chevrolet HHR (2009-2011) 2.2L

Complete Timing Chain, Water Pump, and Head Gasket Overhaul Kit for 2009-2011 Chevrolet HHR (GM Delta)

What it Does: The Performance Timing Chain, Water Pump, and Head Gasket Kit completely refreshes the valvetrain synchronization, internal cooling, and cylinder head sealing on 2009-2011 Chevrolet HHR models to prevent catastrophic engine failure and restore factory compression.

The Stock Chevrolet HHR Timing and Cooling Vulnerability

Factory-equipped 2.2L LAP Ecotec engines in the GM Delta platform suffer from premature timing chain stretch, brittle nylon-faced guide failures, and internal water pump bearing wear. Hydraulic chain tensioners routinely bleed down or stick, causing chain slap that shears teeth from the balance shaft and variable valve timing (VVT) sprockets. Once timing slips, severe valve-to-piston contact occurs in this interference motor. Concurrently, factory single-layer or degraded graphite cylinder head gaskets yield under thermal cycling, allowing high-pressure combustion blow-by into the coolant passages.

The Engineering Solution

This master overhaul assembly fixes factory valvetrain flaws by utilizing shot-peened, high-tensile link chains paired with hardened heat-treated steel sprockets and friction-resistant, reinforced guide rails. The included Multi-Layer Steel (MLS) head gasket features high-recovery fluoroelastomer-coated outer layers and an active combustion ring embossment to withstand cylinder pressures under intense heat soak. Paired with a high-flow, corrosion-resistant cast water pump and precision VVT actuators, this complete service kit replaces problematic OEM references 9-4201S, 12680750, and HS26517PT to help ensure reliable valve timing and leak-free engine cooling.

What's Included

• 1 Timing Chain (148 Links)
• 1 Tensioner
• 2 VVT Camshaft Gears (Exhaust)
• 2 Camshaft Position Actuators
• 2 Variable Valve Timing Solenoids
• 1 Crank Sprocket (23 & 42 Teeth)
• 1 Guide Rail (Tensioner Guide, Left and Upper for Cam Chain)
• 1 Timing Chain Balance Shaft (134 Links)
• 1 Balance Shaft Tensioner
• 1 Balance Shaft Sprocket (Intake & Exhaust Side)
• 1 Guide Rail Balance Shaft (Upper, Left & Right)
• 1 Water Pump with Gasket
• 1 Timing Cover Gasket Set
• 1 Multiple Layers Steel (MLS) Head Gasket
• 1 Valve Cover Gasket
• 1 Set of Valve Stem Seals
• 1 Intake Manifold Gasket
• 1 Exhaust Manifold Gasket
• 1 Front Camshaft Seal
• 1 Set of O-rings
• 1 Set of Miscellaneous Small Gaskets

Technical Specifications

Compatibility

• 2009 Chevrolet HHR 2.2L L4 (LAP Ecotec)
• 2010 Chevrolet HHR 2.2L L4 (LAP Ecotec)
• 2011 Chevrolet HHR 2.2L L4 (LAP Ecotec)

Frequently Asked Questions & Fitment Warnings

Does this fit the GM Delta HHR?

Yes, this is a direct fit for the 2009-2011 Chevrolet HHR equipped with the 2.2L LAP Ecotec VVT engine; it is not compatible with pre-2009 non-VVT 2.2L L61 engines or 2.0L turbocharged SS models.

Do I need a special tool to replace the water pump on this Ecotec platform?

Yes, an Ecotec water pump sprocket holding tool is recommended during installation if servicing without completely pulling the balance shaft timing chain assembly.

The Chevrolet Reliability Standard

Engineered to deliver long-term durability and zero-defect synchronization under demanding daily commuting and commercial fleet duty cycles, this kit restores factory compression and optimal valve timing to your GM platform.