Omix-Ada 17465.93 - 1998 Jeep Grand Cherokee Main Engine Bearing Set

Main Engine Bearing Set, 0.030" Over, Complete Set Per Engine (17465.93) by Omix-Ada®. The only thing between your main bearings and crankshaft is a thin film of pressurized oil. If dirt or metal particles enter this small space, the crankshaft and bearings can become scored. Enough wear and scoring and soon the oil clearance is too great to fill with the oil pressure developed by the oil pump. The result is metal-to-metal contact, which can cause expensive engine damage like a ruined crankshaft, spun bearings or worse. Replace your worn main bearings before expensive damage can occur with these OEM spec quality units from the Jeep experts at Omix-Ada.

Features:

• Includes a complete set of upper and lower main bearing shells
• Restores bearing oil clearance
• Meets or exceeds OEM quality standards
• OEM quality at an affordable price
• Identical to original equipment, for perfect fit and function
• Backed by a 5-year limited warranty

In fact, that thin film of oil (typically just 0.0025"-0.003") mentioned above can disappear for other reasons other than foreign particles. Bearings can wear with use, they can be starved of oil if there is a pump or clogged oil passage problem, and they can also become fatigued due to detonation or engine lugging. The crankshaft thrust bearing can fail due to excessive torque converter pressure or from riding the clutch pedal, resulting in excessive crankshaft end-play.

Most plain bearings are constructed with a steel backing that provides support, with overlays of copper and/or lead alloy, and final surface coating of Babbitt material, to provide a soft surface if shaft contact is made and to collect contaminants that would otherwise damage the crankshaft. Symptoms of main bearing failure include knocking, particularly at engine startup, and low oil pressure. Most oil pressure lights don't illuminate until pressure is very low, so even if you don't see a light but hear a lot of clattering and knocking, chances are you have low oil pressure.

Whatever the reason for failure, when you're ready to replace your main bearings look to Omix-Ada for the quality, OEM spec main bearings that will maintain oil pressure for optimal engine performance and long engine life. Bearing construction is according to OEM design, so you can be assured they'll work perfectly with OEM spec oil clearance. And if your crankshaft requires grinding undersize to restore the finish, Omix-Ada offers bearing sets in all popular oversizes, so you can always set the oil clearance to factory specifications.

Omix-Ada® is based in Suwanee, Georgia. The company was founded in 1992 and today is the largest independent manufacturer and distributor of Jeep parts and accessories, with over 11,000 parts in stock. However, Omix-Ada is more than just a parts manufacturer; the founder and the employees are all Jeep enthusiasts who are dedicated to producing the finest quality Jeep parts. Omix-Ada has everything from licensed parts for concours restorations, to stock replacement parts for repairing Jeeps from the 1940s to the present day, as well as heavy-duty and high-performance parts sold under the Rugged Ridge®, Alloy USA®, Outland®, ORV Suspension, and Precision Gear® brands. Omix-Ada engineers are constantly developing and trail testing new products to make sure they're perfected for you, and the company has won numerous awards at the annual SEMA (Specialty Equipment Market Association) show.