Nissan 13061-1W600 Camshaft Assembly

To take out the Lash Adjusters, begin by removing the valve cover and rocker arm shaft assemblies. Use rubber bands to keep them in place so that they don't come off from their guides. The Lash Adjuster guide assembly is then removed and Lash Adjusters are taken out of the bores one at a time, keeping them in order. They should not be laid on their side or upside down to avoid trapping air inside. If you feel like there is trapped air, put back the rocker arms, shafts as well as, valve covers and run the engine for 10 minutes at 1000 rpm to bleed the air out of the Lash Adjusters. While they are outside of the engine, check for wear by examining them again so that you can replace if needed. To get rid of camshafts remove heads and pry camshaft cover plate gently from there (Gillespie 7). When unscrewing retaining bolt hold it with holding lugs tightening it accordingly till you remove thrust plate and bolt. The camshaft oil seal should be removed with caution to prevent scuffing or scratching it as it is being pulled out. By rotating in twist squeeze motion pull oronsealpacificcamshaft out of cylinder head (Olay/Weisman Architects). Camshafts are lubricated on bearing journals and lobes using moly-based engine assembly lube before they are cautiously placed into position in the cylinder head (Olay/Weisman Architects). Install camshaft thrust plates with their retaining bolts and ensure that I have checked if my camshafts have any end play (Olay/Weisman Architects). In case endplay does not fall within certain range then thrust plate has to be replaced (Olay/Weisman Architects). Set up camshaft oil seal thus finishing assembling cylinder head.

Visually check the camshaft bearing surfaces for pitting, score marks, galling, and abnormal wear; if damaged, the cylinder head must be replaced. Measure the outside diameter of each camshaft bearing journal and record the measurements, then compare them to the specified journal outside diameter and measure the inside diameter of each corresponding camshaft bearing. Subtract each cam journal outside diameter from its respective cam bearing bore inside diameter to determine the oil clearance and compare the results to the specified journal-to-bearing clearance; if any measurements fall outside standard wear limits, replace the camshaft or the cylinder head, or both. Check camshaft runout by placing the camshaft between two V-blocks and setting up a dial indicator on the center journal, zeroing it, and turning the camshaft slowly to note the readings; if the measured runout exceeds the specified limit, replace the camshaft. Measure each cam lobe height with a micrometer, ensuring to get the highest reading, and compare it to the specified height, subtracting the measured height from the specified height to compute wear; if it exceeds the specified limit, replace the camshaft. Inspect the contact and sliding surfaces of each Lash Adjuster for wear and scratches, noting that if the Lash Adjuster pad is worn, the corresponding camshaft lobe should also be checked. Measure the outside diameter of each Lash Adjuster with a micrometer and compare it to the specifications; if any Lash Adjuster is worn beyond the limit, replace it. Check each Lash Adjuster bore diameter in the Lash Adjuster guide assembly and subtract the Lash Adjuster diameter to find the Lash Adjuster-to-guide clearance, comparing the results to the specifications; if any Lash Adjuster bore is worn beyond the limit, replace the Lash Adjuster guide assembly. Subtract the outside diameter of each Lash Adjuster from the inside diameter of the Lash Adjuster bore and compare the difference to the specified clearance; if both are within acceptable limits, this measurement should also fall within tolerance. Check the rocker arms and shafts for abnormal wear, pits, galling, score marks, and rough spots, avoiding attempts to restore rocker arms by grinding the pad surfaces. Measure the outside diameter of the rocker arm shaft at each journal and the inside diameter of each rocker arm with either an inside micrometer or a dial caliper, subtracting the corresponding rocker arm shaft diameter to obtain the clearance and comparing the results to specifications. Finally, subtract the outside diameter of each rocker arm shaft journal from the corresponding rocker arm bore diameter to compute the clearance; if any measurements fall outside the specified limits, replace either the rocker arms or the shaft, or both.

To take out the Lash Adjusters, begin by removing the valve cover and rocker arm shaft assemblies. Use rubber bands to keep them in place so that they don't come off from their guides. The Lash Adjuster guide assembly is then removed and Lash Adjusters are taken out of the bores one at a time, keeping them in order. They should not be laid on their side or upside down to avoid trapping air inside. If you feel like there is trapped air, put back the rocker arms, shafts as well as, valve covers and run the engine for 10 minutes at 1000 rpm to bleed the air out of the Lash Adjusters. While they are outside of the engine, check for wear by examining them again so that you can replace if needed. To get rid of camshafts remove heads and pry camshaft cover plate gently from there (Gillespie 7). When unscrewing retaining bolt hold it with holding lugs tightening it accordingly till you remove thrust plate and bolt. The camshaft oil seal should be removed with caution to prevent scuffing or scratching it as it is being pulled out. By rotating in twist squeeze motion pull oronsealpacificcamshaft out of cylinder head (Olay/Weisman Architects). Camshafts are lubricated on bearing journals and lobes using moly-based engine assembly lube before they are cautiously placed into position in the cylinder head (Olay/Weisman Architects). Install camshaft thrust plates with their retaining bolts and ensure that I have checked if my camshafts have any end play (Olay/Weisman Architects). In case endplay does not fall within certain range then thrust plate has to be replaced (Olay/Weisman Architects). Set up camshaft oil seal thus finishing assembling cylinder head.