WebApr 5, 2024 · With a typical 350 small-block Chevy, for example, the main journal diameter is 2.448-inches. This jives nicely with that 0.0025-inch clearance. That engine’s rod … WebDec 25, 2024 · 1971 Heavy Chevy - original owner 1984 Riviera - original owner - Wife's car . Reactions: sleeper and Wolfplace. Save Share. ... The recommendation for our 2.000” shaft would be .0025” of clearance." Big block main bearing size is 2.750 so .0025" clearance is a good safe number. The other thing to keep in mind is the measuring method.
Main Bearing clearance and connecting rod bearing...
WebNov 29, 2002 · If the main bores are too big, you chance spinning a bearing due to insufficient crush. If the crank is the problem, then the .001 undersize bearings should solve the problem. I personally like things on the tight side. .002 is fine with me.-----Bill Koustenis Advanced Automotive Machine Waldorf Md 1971 Heavy Chevy - original owner Team ... WebMar 14, 2024 · The typical rule of thumb for an OE or mild-performance application is .001-inch bearing clearance for every 1-inch of crankshaft or rod journal diameter. With a big … meaning of rickettsiae
Bearing clearance on a Chevy small block. #4 - YouTube
WebJul 13, 2024 · As an example with a small-block Chevy main journal of 2.200-inch – then an oil clearance of 0.0022-inch would be a great … WebJun 5, 2013 · Plastigauge says the clearances are .002-.003 but the rear bearing has some kind of shallow pitting on it. The crank is nice and smooth, and the oil holes are clean. Since main bearings cost a fortune now (along with everything else) I … WebMar 10, 2008 · 1,960 Posts. #3 · Mar 9, 2008. Generally, bearing clearances are specified as .001" of oil clearance per inch of journal diameter, as a starting place. Therefore a BBC would need about .002" on the rods and just under .003" for the mains In the "old days" engine builders would generally open the clearances further, then use higher viscocity oil. meaning of ricola