Posts Tagged: Excessive Blow-By

Excessive Blow-By: Understanding the Indicators

Measuring Excessive Blow-By In Your Engine Excessive blow-by doesn’t occur without cause. It’s a red flag indicating potential issues such as worn piston rings, cylinder wall glazing, or improper ring installation. When blow-by surpasses acceptable levels, it allows combustion gases and unburned fuel to contaminate the crankcase oil, leading to sludge formation and accelerated engine wear. How Much Blow-By Is Too Much? Engine builders agree that a new engine should have around 1% blow-by or less. Once blow-by exceeds 10%, it’s a clear indication of trouble. While the engine might … Read More