Most rear main seal leaks are caused by the drying, hardening and shrinking of the main seal, plus normal wear in the crankshaft and seal. Help your customers easily and cost-effectively protect their vehicles from further damage with Bar’s Leaks Concentrated Rear Main Seal Repair.” “Many people won’t notice a rear main seal leak for a while because it is usually so gradual. “What starts as a small drop of oil on the driveway here, and there can escalate into a damaged starter and other expensive problems,” says Clay Parks, vice president of development for Bar’s Leaks. It’s a high-tech blend with reinforced synthetic polymers specifically designed to expand and restore elasticity to renew main seals, as well as cam seals, O-rings, timing cover seals and other gaskets. Quickly and inexpensively solve any oil leaks with Bar’s Leaks Concentrated Rear Main Seal Repair (No. While it is best to replace an oil-saturated and damaged starter, you also want to offer customers a solution to fix the leak that caused the problem. Unfortunately, this is a common cumulative effect of heat, age and mileage in older cars and trucks. Typically when a vehicle has an oil-soaked starter, the problem is a slow oil leak in the engine’s rear main seal.

Some of the information may no longer be relevant, so please use it at your discretion. Editor's note: This article was originally published Dec.

Oil leak 5.9 cummins rear main seal