Genuine 1994 Jeep Wrangler Camshaft

1994 Jeep Wrangler Camshaft Parts Questions & Experts Answers

• Q: How to remove and reinstall the camshaft in 2.4L four cylinder engine on 1994 Jeep Wrangler?

  A: Remove the valve cover and the Camshaft Position Sensor (CMP) along with the camshaft target magnet. Take off the timing belt, camshaft sprockets, and the rear timing belt cover. The camshaft bearing caps are numbered for their specific locations in the cylinder head and must be returned accordingly; remove the front and rear bearing caps at each end of the camshafts, loosening the bolts gradually to avoid distorting the camshafts. Once loosened, if the caps are difficult to remove, use the bearing cap bolts for leverage and gently tap with a soft face mallet if necessary. Carefully lift the camshafts out of the cylinder head, marking them as INTAKE and EXHAUST since they cannot be interchanged, and remove the front seal from each camshaft. Clean the camshaft(s) and gasket surface, inspecting for wear or damage on the lobe surfaces, bearing journals, and seal contact surfaces, as well as the bearing surfaces in the cylinder head and caps. Measure the camshaft bearing journal diameters and the inside diameter of the bearing surfaces in the cylinder head, calculating the oil clearance and comparing it to the specified value; replace any worn components. If the camshaft fails inspection, it should be replaced, and the cylinder head may also need replacement if the bearing surfaces are damaged. Lubricate the camshaft(s) and cylinder head bearing journals with clean engine oil, placing the camshaft back in its original location without installing the rocker arms. Install the rear bearing cap and tighten the bolts to the specified torque. Use a dial indicator to measure the camshaft endplay by prying the camshaft fully to the rear and then to the front, comparing the travel to the tolerance; check for wear if excessive. Install the valve lash adjusters and rocker arms, clean the camshaft and bearing journals, and coat them with assembly lube or engine oil before carefully installing the camshafts in their original locations. Temporarily install the camshaft sprockets and align the timing marks, ensuring the crankshaft sprocket timing mark is positioned correctly. Install the bearing caps, except for the No. 1 and No. 6 end caps, tightening the bolts in the proper sequence. Apply a small bead of anaerobic sealant to the No. 1 and No. 6 bearing caps before installing and tightening them. Finally, install new camshaft oil seals, the timing belt, covers, and related components, and reinstall the valve cover.