Nissan 13061-1W600 Camshaft Assy

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To have the Lash Adjusters out of the way initial steps to maneuver include the removal of the valve cover and also the rocker arm shaft. Safeguard the Lash Adjusters by lifting a few inches off the guides and fasten it to avoid anymore dropping off the guides; In case of any Lash Adjuster drops off the guide, replace it quickly. After that, it is required to make the Lash Adjuster guide assembly removal with the help of the rubber bands and then to extract the Lash Adjusters from the corresponding bores, while pulling them out one by one and putting them into a correspondence with their number for the further putting-in. Some of the points that should not be done includes- Laying the Lash Adjusters on their side or upside down since this will trap air in them, they can only be placed on their sides if they are submerged in clean engine oil. According to Iles, if a Lash Adjuster moves more than 0.040-inch when it is pushed down in the bore, one should check if there is ingress of air. If you think there is trapped air, replace the rocker arm shaft assemblies and the valve cover then relieve the air by starting the engine and bringing the engine to 1,000 rpm under no load for roughly ten minutes. Subsequently, pull out the valve cover and the rocker arm shafts, carry out the push-down test again. If air is present replace the Lash Adjuster. When the Lash Adjusters are removed, check them for wear and then, apply clean engine oil to each of them; to reinstall the Lash Adjusters, it is as simple as how they were removed. During the camshaft removal procedure, one must first take off the cylinder heads, secondly, to loose the cover plate bolts and thirdly, and gently tilt the camshaft cover plate off. While this is being done on the corresponding end, turning is done to loosen the retaining bolt so that the camshaft holding lugs retain the thrust plate while it is being removed. Very gently, turn the camshaft oil seal counterclockwise and also gently twist the camshaft upward using the wrench lest you mar the bearing surfaces. For installation, coat the camshaft bearing journals and lobes with moly-based engine assembly lube and then, slowly 'Thread in' into the cylinder head. Screw in the camshaft thrust plate and its bolt and torque this to the required setting. Bolt another dial indicator in contact with the end play, shift the camshaft backward and set down the dial indicator then shift the camshaft to the front and take another reading. If the endplay is of the order of say 0.020 to 0.030 inches, progressively measure the old plate and if it is beyond this limit, then get a new plate to ensure that the end play does not exceed this range. The rest of the cylinder head assembly is done is reverse of the above procedure. When jumping a camshaft, take out the old seal and using and after placing the camshaft in, use the seal installation tool to force the new seal into place until it engages the cylinder head.

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.

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 for pitting, score marks, galling, and abnormal wear. If any damage is found, the cylinder head must be replaced.

Engage the camshaft sprocket teeth with the timing chain links, align the match marks, and position the sprockets over the dowels on the camshaft hubs.

Lubricate the lifters with clean engine oil, then install the lifters and shims into their original locations.

If lifter pads are found to be worn during inspection, check the corresponding camshaft lobes or adjusting shims, as they may also be worn. Replace any worn lifter pads.

Inspect the camshaft and lifters.

Complete the installation by reversing the removal process.

Calculating the clearance between the lifter's outside diameter and the lifter bore's inside diameter helps determine if the lifter-to-bore clearance is within specified limits. Deviations from these values may require action, such as replacing lifter guide assemblies or cylinder heads.