This will reseat the hardened steel plunger valve against the aluminum cam plate. Feuling's performance hydraulic roller lifters are CNC-machined, precision-ground and a drop-in replacement for stock lifters. We believe in "being all-in to go all-out" is reflected in our quality motorcycle parts. Free shipping for many products! By now most of the 99 - 2000 TCs should have all the bugs worked out . Shown is one method for checking pinion shaft runout using a dial gauge. However, several other details should be addressed. Unlike the Evolution and Shovelhead cranks, the TC crank is a press-together unit where the crankpin is a "hard" press fit into the two flywheels halves. Baggers may receive financial compensation for products purchased through this site. The Milwaukee 8 and Newer Twin Cam engines have a know puking issue. A frank discussion of the inherent flaws with the Harley Twin Cam engine, produced since 1999 to the present. The scoring was due to excessive crankshaft runout, which resulted in pinion shaft wobble. The sealing ability of the piston rings can be checked by using a leak-down tester. As a start I intend to change the Fluid which is yellow in colour for the newer spec Hyspin V10. 600 Posts #2 • Jun 22, 2010. but the loose liners are a very common problem. I had one last month , a 99 RK , with 26k miles that I replaced the tensioner shoes on and it had the original bearings in it . The Twin Cam's oiling system requires a fine balancing act to maintain the correct amount of oil pressure, oil volume and scavenging to eliminate wet-sumping while maintaining quiet operation and optimized power production without generating excessive heat. Then reinstall the plunger valve, use a brass punch centered in the back of the valve and give it a good whack with a hammer. Here are our top picks. Compared to the '06 Dynas and all '07-and-later oil pumps, the Feuling pumps show a 20 percent increase on the pressure side and 30 percent on the scavenge side. Now, let’s look at a diagram of the our problematic twin cam crankshaft: Problem number 1: I don’t know how they spline that shaft, but when they do, the alter the shaft’s integrity and its aliment with the left flywheel. The tester includes a pressure gauge, 0-100 psi regulator, mounting plate, gaskets and related hardware. This most affordable example of the Big Twin breed is an inviting canvas for extreme and creative customization. Its been a long time since I've posted on the forum, and its good to be back! Feuling makes a high-quality pressure relief spring for the Twin Cam with the correct spring rate to control and maintain proper oil pressure. Make sure all oil and breather lines are free-flowing and not pinched. Unfortunately, low oil pressure causes a domino effect. Shown is the Feuling plate for '99-'06 engines except '06 Dynas, PN 8000. being spring loaded, there was always constant pressure on that chain, unlike newer models where the tensioners fill with oil. This is a common problem. A dry-sump system only circulates a minimal amount of oil in the engine at any one time, while the majority is stored in a remote oil tank. Jerry from Denver asks… I’m getting ready to buy my first big twin Harley-Davidson motorcycle and don’t understand the difference between the Twin Cam 96 and 96B (Balanced). you have hit most of the common problems of the 110. nice write up. My inattention almost cost me an engine. Keep a eye on the chain tensioners on both the cam and the primary chain but at your miles you got a way to go on either. The Milwaukee 8 and Newer Twin Cam engines have a know puking issue. The Feuling spring provides the proper spring rate for the optimum pop-off pressure and oil flow through the bypass port. I have disassembled the Master Cylinder to check the seals and they do look to be fine. Building a bulletproof Twin Cam oiling system starts with a properly modified crankshaft, quality parts, proper prepping of components and a basic understanding of how the oiling system works. I just received the January issue of American iron magazine. To remain EPA-compliant, you'll have to route the lines to the air cleaner. (10.) The Harley-Davidson Twin-Cam V-twin was introduced in 1998. (7.) Leakage at the relief valve will reduce oil pressure. Harley also knew that a solid-mounted Twin Cam 88 engine would create too much vibration. This video shows how. Twin-Cam Coil by Daytona Twin Tec®. The Twin Cam 88 engine uses a dry-sump system for lubrication. A wobbling pinion shaft will score or even break the oil pump housing and gerotor gears, since the pump is mounted over the shaft. To achieve an efficient oiling system, the entire system must be balanced for oil pressure, oil volume and oil scavenging capability. This photo demonstrates the size differences (diameter and thickness) of the scavenge gears used in three different Twin Cam oil pumps. Also included are additional oil passages for the 2007-and-newer (2006-and-newer Dyna) engines with large camshaft journals. Most new engines throughout Harley-Davidson’s timeline have come about due to the need to … The tool allows the engine builder to know at what psi the relief valve opens. The arrow indicates the cam plate hole that will leak air if the pressure relief valve in the cam plate is leaking (valve not seating). UltraCool says the problem with the Softail Deluxe has to do with some of its perceived cheaper components. Bulk savings: Buy 1. For comparison, a well-built Twin Cam crank will exhibit .001 inch or less of runout, although factory tolerances are often .004 inch and sometimes more. I hear there is a fix for the aforementioned problem from the MOCO that addresses the problem of shutting everything down in a "delayed" fashion. A serious problem with the Twin Cam engine is excessive crankshaft runout, which is a result of the flywheels shifting on the crankpin. With all the talk about the problems with the cam tensioners, specifically, the excessive wear of the shoes, whereas the bits of plastic pass through the oil pump, possibly causing problems with the pump, I wondered if this has yet been addressed by HD. The TC-96 (Twin Cam – 96 cubic inches) engine is used in all H-D Dyna and Touring models. Cam Chain Tensioners. Sell or buy used bikes? Harley sought the help of Paul Troxler, a young engineer from Southwest Research Institute and eventually the problem was traced to a design which drained the cam case into the crankcase, and used a single scavenge pump. For street engines, you need sufficient oil pressure to maintain proper hydraulic lifter operation during low-rpm stop-and-go riding in the hot summer months when the engine oil is thin. Sign up to receive our email newsletter and never miss an update! The newest generation in Harley-Davidson Big Twin performance, the Twin Cam 96 air-cooled V-Twin 45-degree engine debuted along with a 6-speed Cruise Drive transmission in 2007 on all Touring, Softail and Dyna models, setting a standard in the motorcycling industry. I n the May issue of Baggers, we looked at several weak spots in the Twin Cam's bottom end, mainly excessive crankshaft runout and drive issues relating to the chain-driven cams.One area we did not discuss was the Twin Cam's oiling system and associated problems found on stock and high-performance Twin Cam engines. An ideally trued crank should be trued to within .001 inch. The chain tensioning system in these motors uses plastic “shoes” riding on the cam chains that wear out. (11.) Insufficient pressurization not only increases lifter noise but also reduces performance, because valve lift and timing are lost. Additionally, oil pressure and scavenging decrease, allowing excess oil to fill the crankcase and gearcase areas. Under some conditions, even a stock engine can tax the Twin Cam's oiling system. It utilizes plastic shoes “riding” on the cam chains that can and will actually wear out in due time. The M3 Ventilator will offer you engine lower crankerything you need to install.For … Shoei Premium Helmets announces the GT-Air II with integrated sun visor, optimized aerodynamics and ventilation, and consideration for a Sena Bluetooth system. In contrast, if the valve stops working properly and sticks open due to debris from worn chain tensioners or poor machining tolerances, oil pressure can drop below minimum requirements. 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