How To Check Bearing Clearances With A Feeler Gauge Proper bearing clearance is essential when building an engine. that holds true for both your main bearings and rod bearings. we partnered with the summit racing team to cover the ins and outs of main bearing clearance earlier. now we’ll look at the steps involved with measuring and checking rod bearing clearance. After measuring all eight rod bearing clearances and using shell halves to set the clearances, it’s very common to have a clearance spread between the rods of perhaps 0.0004 to 0.0005 inch.
Know How Notes How To Measure Engine Bearing Clearance в Napa Blog Setting bearing clearance for a performance engine is a fundamental step in the building process. there are no quick and easy ways to establish this critical. Insist on a micrometer that will measure to 0.0001 inch accurately. this is an absolute necessity. measuring the inside diameter of a main or rod bearing will require a dial bore gauge. the best ones to use are accurate down to 0.0001 inch. with these two tools you can quickly determine the clearances in any engine. Creating the desired bearing clearance starts with accurately measuring the journal diameter. in this case, we’re measuring a big block crank main journal. the only accurate way is to use a micrometer that measures down to 0.0001 inch. the first order of business is to measure the crankshaft. Here you can see my bearing clearance is approximately 0.025mm, or 0.001”. proper bearing clearing for the lt1 for a service engine (engine that is not brand new) is between 0.02mm 0.065mm or 0.0008” 0.0025”.
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