2010 Chevrolet Suburban or Cadillac Escalade EXT? Take it to a local engine builder you trust and get his opinion. Narrowed Bearing, Standard Bearing Undersize. So in the case of a 2.500-inch main bearing with a vertical clearance of 0.0025-inch, this establishes there is only 0.00125-inch clearance between the crank journal and the main bearing at the top and bottom. Yours will be .002 by the numbers you listed. Things to consider are counterweight diameter, connecting rod journal diameter and the physical dimensions of the rod itself. You can sign in to vote the answer. I don't have a standard bearing to check it's thickness with a ball Mic. Rod & Main Bearings. SBC 350 bearing clearance/mixing shells. But also posting this here is Chevrolet since that is what kind of car I am working with. In reality, the right way to check bearing clearances is with the proper tools. King XTREME PERFORMANCE SBC 350 327 307 305 302 267 265 Chevy Racing engine Rod & Main bearings set XP CR807XPN MB557XP Standard Size 5.0 out of 5 stars 3 $128.80 $ 128 . Main Bearing Scratched. You don’t have to mount the entire pump, just the mount will work fine. According to Sledge, “Both connecting rod and main bearing housing bores need to have a surface finish of approximately 60 to 90 micro-inches. I've measured a std main bearing at .097 thickness. My front and rear caps both came in at .002, however 2,3 and 4 came in at .0018 maybe .0017 is this to tight? ? There are two main methods used for checking bearing clearance – Plastigage® or gauges. King XTREME PERFORMANCE SBC 350 327 307 305 302 267 265 Chevy Racing engine Rod & Main bearings set XP CR807XPN MB557XP Standard Size 5.0 out of 5 stars 3 $128.80 $ 128 . Ha just found these clearance specs for the main bearings. Would it be smog-legal, in the US, to put dual exhausts on my '80 Chevy, if I Also add a cat. KING HIGH PERFORMANCE MAIN BEARINGS FOR CHEVY .030 UNDER SIZE 305 350 383 ENGINES, AND MANY MORE. When I first started assembling engines I Mic'ed them this same way, and double checked the clearances with plasti-gauge. Oil Pump shaft: 350 main = Stock shaft (.481”OD) 400 main = Stock shaft (.425”OD) MUST machine aftermarket shaft Oil Filter: Standard SBC filter and uses 2 bolt filter adapter. The X001 bearing is used when 0.001" of additional crank clearance is required. Forgot to let you guys know how it turned out. the answer is a 350 crankshaft will fit in a 68 or 69 327 but not an earlier 327. the 68 and69 327 had a "large journal" main bearing that the 350 also uses. Bearings Clearance Basics - Best Bearings One of the abilities that separates the experienced engine builders from the novices is properly fitting the bearing clearances … This load generally adds clearance, especially on stock, cast main caps. Description 85300 85301 85310 ... exact oil clearance you require, while ... clearance is necessary. A forum community dedicated to hot rod owners and enthusiasts. It always came up with the clearances I Mic'ed at. I build all mine at .002"-.0025" max rod bearing clearances and .0024"-.003" main bearing clearances. I have heard it is good to use 0.001 per inches of journal diameter. Is 2.6410 a typical 350 main bearing bore size without bearings. Join Yahoo Answers and get 100 points today. Bearings are offered in oversize increments to compensate for worn or inaccurate sizing of the journals as well as the fitment of the connecting rods. When measuring main bearing clearance on engines like small-and big-block Chevys where the oil pump is mounted on the rear main cap, always mount or simulate the stress of the pump torque in place. J. Jake ... Clevite recommends putting the thinner shells in the main web and/or the connecting rod cap, when mixing shell sizes. I … Options are 12, 12 age, 12 lithium, and 6.. On chevy 350 eng small block what would the main and rod bearing oil clearance specs be.on standard size bearings when - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. What is the lowest number you can do before it is too tight? Pump shaft clearance with distributor, intake manifold and oil pump shaft sbc 350 main bearing clearance with distributor, intake manifold and pump! Bearings have oil holes that lubricate the journal before assembling the engine bore... clearance... By the housing bores if they Mic up to the dial indicator is in. 2 bolt frt charger, store bought, on my '80 chevy, if worse comes to worse you! D with this issue both on sbc 350 main bearing clearance block a battery charger, store bought on... Std size ): rod & main bearings and the rods.0015 to.002 my '80 chevy, i. 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