How to Install 4 7HO Camshafts u0026 Solid Lifters in a Jeep Dodge Chrysler u0026 MitsubishiNo need to remove your fuel rail. Just loosen and move the brake booster out of the way as you normally would have, to access the rear right cylinder. If you’ve ever tried to replace the valve seals or keepers on a 3.7L V6 or 4.7L V8 engine, you must’ve realized it’s nearly impossible using other cheaper special tools.