Performance Engine Rebuild Re-Ring Kit for Chevrolet Avalanche (2002-2013) 5.3L

Precision Engine Rebuild Re-Ring Kit for 2002-2013 Chevrolet Avalanche (GMT800 / GMT900)

What it Does: The Performance Engine Rebuild Re-Ring Kit restores combustion chamber compression, eliminates oil consumption past the ring pack, and renews critical journal clearances on 2002-2013 Chevrolet Avalanche 5.3L V8 engines.

The Stock Chevrolet Avalanche Ring Land and Bearing Degradation

High-mileage Vortec 5300 platforms frequently suffer from severe blow-by, carbon-fouled low-tension oil control rings, and accelerated rod and main bearing scuffing. Thermal cycling compromises factory composite gaskets, leading to external oil seepage at the rear cover and valley plate, while pressurized coolant migration past degraded cylinder head sealing risks catastrophic hydro-lock and crankcase oil contamination.

The Engineering Solution

This master overhaul kit features high-tensile ductile iron compression rings and stainless steel oil rings precision-machined to combat cylinder taper and maintain ring seal under heavy towing loads. High-durability bi-metal or tri-metal rod and main bearing shells restore proper hydrodynamic oil wedge clearances to arrest crankshaft journal galling. Premium Multi-Layer Steel (MLS) head gaskets provide superior bore clamping force and heat dissipation compared to stock graphite composites, preventing combustion gas blowouts under elevated cylinder pressures.

What's Included

• 1 Gen III Valley Cover Gasket (12558178)
• 2 LS1/LS2/LS3 Header Gaskets
• 1 LS Oil Pan Gasket
• 2 LS Water Pump Gaskets
• 1 LS Front Timing Cover Gasket
• 2 LS Valve Cover Gaskets
• 1 LS Harmonic Damper Front Seal
• 1 LS Rear Cover Gasket
• 1 Rear Main Crankshaft Seal
• 4 Water Crossover / Block-Off Gaskets (12551933)
• 1 Oil Filter Adapter Bypass Gasket (12611384)
• 2 Knock Sensor Grommets (12558177)
• 2 Multi-Layer Steel (MLS) Head Gaskets
• 1 Cylinder Head / Fastener Bolt Kit
• 1 Complete Engine Piston Rings Set
• 1 Main Bearings and Connecting Rod Bearings Set

Technical Specifications

Compatibility

• 2002-2006 Chevrolet Avalanche 1500 5.3L V8 (GMT800)
• 2007-2013 Chevrolet Avalanche 5.3L V8 (GMT900)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT800 and GMT900 Avalanche?

Yes, this is a direct fit for the 2002-2013 Chevrolet Avalanche equipped with the Vortec 5.3L engine. Note: This kit does NOT fit 6.0L applications, and intake manifold gaskets are not included.

What bore diameter are the supplied piston rings engineered for?

The piston rings are sized for standard 3.780-inch (96.01 mm) 4.8L and 5.3L cylinder bores and must not be installed on 4.00-inch or larger 6.0L engine blocks.

The Chevrolet Durability Standard

Built to handle rigorous duty cycles, steep grades, and heavy payload demands, this overhaul setup provides commercial-grade sealing and bottom-end integrity necessary to maximize the operational lifespan and towing performance of your Chevrolet truck.