OE #12581253 Rear Main Crankshaft Seal for Buick, Cadillac, Chevy, GMC, Pontiac & Saturn
Product Overview
As a core product of Growshine International, the OE #12581253 Rear Main Crankshaft Seal delivers OEM-grade sealing performance for gasoline and diesel engines across multiple platforms. Designed to prevent oil leaks and withstand extreme pressures in engineering machinery, heavy trucks, agricultural equipment, and automotive engines.
Key Specifications
Material: High-temperature resistant fluorocarbon rubber with steel casing
Compatibility: Buick 231/350/455, Cadillac 365/500, Chevy 265/283/250, GMC 637, Pontiac 301/350/400/455, Saturn L-Series
Pressure Rating: 45 PSI continuous / 75 PSI peak
Temperature Range: -40°F to 400°F (-40°C to 204°C)
Cross-Reference & Applications
| Engine Model | Growshine Part # | OEM Equivalent | Application |
|---|---|---|---|
| Buick 455 | GS-730-V | Victor JV-730 | Construction Equipment & Heavy-Duty Trucks |
| Chevrolet 250 | GS-728-APR | Victor JV-728 | Agricultural Machinery & Fleet Vehicles |
| GMC 637 | GS-616-XL | ROL RS-29115 | Mining Equipment & Long-Haul Trucks |
Technical Advantages
1. Anti-Dry-Start Protection: Pre-lubricated with 50W synthetic oil to prevent seal lip tearing during initial startup
2. Dual-Lip Design: Secondary dust barrier extends service life in dusty environments common to agricultural machinery
3. Precision Fit: ±0.0005" tolerance ensures perfect alignment with crankshaft journals
Common Failure Scenario & Solution
Case Study: 2012 GMC Sierra 2500HD with 6.6L Duramax Diesel
Symptom: Oil leakage from rear engine compartment after 3-month storage
Diagnosis: Original rear main seal hardened and lost elasticity due to dry startup
Solution:
1. Installed OE #12581253 seal with anaerobic gel at butt joints
2. Pre-lubricated seal lip with Mobil 1 50W oil
3. Tested 48 hours with 30 PSI oil pressure – zero leakage detected
Why Choose Growshine International?
Specializing in engineering machinery parts, heavy truck components, agricultural equipment seals, and automotive OE replacements, we provide:
Global logistics network with 48-hour emergency delivery
ISO 9001-certified manufacturing facilities
Custom solutions for construction, mining, and fleet applications
