![]() LS1 CAM BEARINGS PINNING INSTALLYou must install the rear main cap before the RTV sealant starts to harden. Don’t forget to install the upper rear main seal in the block before dropping in the crank!Ī very thin layer of silicone RTV sealant is applied between the block and the rear main cap to prevent oil seepage. The main caps engage dowels in the block to prevent cap “walk” and are a tight fit, so a hammer is used to seat the caps. The crankshaft is a fully-counterweighted 4340 forged steel ultra-light Crower with a 4.500-inch stroke and 2.100-inch (small-block Chevy) rod journals.Īfter installing the upper main bearing shells in the block, the crank and bearings are coated with engine assembly lube and the crank is carefully laid on the bearings. This exotic all-aluminum Rat motor uses the same two-piece rear main seals as your budget 454. After measuring the main bore diameters in the block, you can quickly determine main-bearing-tocrankshaft clearances with this tool. Jonathon used this special bearing micrometer with a spherical anvil for precise measurement of the bearing insert thicknesses. The block does have bosses for the OEM-style thrust plate, which can be drilled and tapped if you desire. The thrust clearance is adjusted with the Jesel belt drive assembly. Although it looks similar to the design of OEM Gen VI cams, this step is not for thrust containment. The face of the cam is machined to standard big-block specs for compatibility with the cam drive sprocket. Note the step on the front of the camshaft. You can use the social sharing buttons to the left, or copy and paste the website link: Īfter bearing installation, the cam is installed using two long 5/16-18 bolts to make sure everything is straight and properly aligned. LS1 CAM BEARINGS PINNING FREESHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read. For a comprehensive guide on this entire subject you can visit this link: LEARN MORE ABOUT THIS BOOK HERE LS1 CAM BEARINGS PINNING HOW TOThis Tech Tip is From the Full Book “ HOW TO BUILD KILLER BIG-BLOCK CHEVY ENGINES“. And check out the complete specification list. Follow along as I show you how Jonathon and John Reedy, K&N race shop’s expert engine builder and dyno operator, assembled this heavy-hitting, lightweight Rat. ![]() It has run as quick as 6.8 seconds in the quartermile at more than 200 mph with a single 4-barrel carburetor on race gasoline with no power adders. This engine is owned by K&N engineer Jonathon Fiello, who competes in the NHRA’s Top Dragster class. The same tool can be used to drive out old bearings as well.Project: 598-ci All-Aluminum Big-Block Application: Competition only, NHRA Top Dragster/Top Sportsman, fast brackets (Quick 16, etc.) Target Power Level: 1,100 hp The removable bearing die allows you to install the first three bearings, and then reverse the tool in the block to install the last two. Sometimes called a cam bearing driver, cam bearing tool, or knocker, this tool has a bearing die and centering cone sized specifically to fit the cam journals of Gen 3 LS engines. The video provides several tips for cleaning, for how to determine bearing order and orientation, and for test-fitting the camshaft.īrian and Mike also share how to operate the Summit Racing cam bearing installation tool. They’re using a late-Gen 3 LS engine block that they rescued from the returns bin and turned into a project 408, but the same techniques work on all of these blocks. In today’s video from our friends at Summit Racing, Brian and Mike demonstrate the proper way to install cam bearings in LS Gen 3, LS Gen 4, or LT Gen 5 engines. If you’ve done everything right, once the camshaft is in place, it should spin by hand with ease! ![]() ![]() They also must be driven into position perfectly straight, with the oil galley holes lined up. Camshaft bearings are sized to fit into the cam housing bore in a specific order. ![]()
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