Then the cam cover and camplate were removed. Brian needed to pull the stock cams and tensioner off the camplate and check and change out the oil pump O-rings before installing the new cams.Then the cam cover and camplate were removed. Brian needed to pull the stock cams and tens Brian pulled all the Screamin' Eagle Big Bore Stage II Kit parts for EFI models from the box. There were a set of SE-255 cams, two Big Bore cylinders, two Big Bore flat top pistons, clips, a Stage I Air Cleaner Kit with one-piece backing plate, integral breathers, all mounting hardware, gaskets, a high-performance clutch spring, and catalyst mufflers.Brian pulled all the Screamin' Eagle Big Bore Stage II Kit parts for EFI models from the b To get started on the install, Brian removed the stock cams from the camplate. The new cams were lined up by the timing marks from the front, then Brian took a black marker and drew a line across the two on the back of the cams to help ensure that the timing marks were lined up as he installed them back into the plate.The new cams were lined up by the timing marks from the front, then Brian took a black mar Afterwards, he checked that the timing marks were right as he spun the cam by hand to see that they lined up.Afterwards, he checked that the timing marks were right as he spun the cam by hand to see Next, the chain tensioner was reinstalled. Here is a photo of the old style with the pressure spring on the left and the oil-filled hydraulic tensioner on the right. It had an oil cavity to hold the pressure spring that filled with oil as the oil pump was running, keeping the chain tight (you cannot compress a liquid).Next, the chain tensioner was reinstalled. Here is a photo of the old style with the press When the chain tensioner was bolted to the camplate, the oil pressure was fed through a small port on the bottom, shown here.When the chain tensioner was bolted to the camplate, the oil pressure was fed through a sm Before the cam plate was reinstalled, Brian removed the stock oil pump from the motor to change out the pump's O-ring and inspected the oil pump for wear.Before the cam plate was reinstalled, Brian removed the stock oil pump from the motor to c The camplate (with the SE-255 cams) was reinstalled and torqued to factory specs. You can see the new-style tensioner as it holds the chain.The camplate (with the SE-255 cams) was reinstalled and torqued to factory specs. You can Brian moved onto the install of the new 3-7/8 flat top pistons into the new Big Bore cylinders. This increases the displacement of your Twin Cam-equipped model from 96 cubic inches (1584cc) to 103 cubic inches (1690cc).Brian moved onto the install of the new 3-7/8 flat top pistons into the new Big Bore cylin The first thing he did was check the ring gap. They were within spec. Next, he installed the rings, starting with the upper compression ring, then the lower, and lastly the oil ring set.Next, he installed the rings, starting with the upper compression ring, then the lower, an « | 1 | 2 | 3 | » | View Full Article By Ernie Lopez Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!
