Cadillac 17122490 Lifter,Valve

Keep lifters and pushrods in order! This is absolutely necessary for installation, since these parts have differences which could result in engine damage if not installed in their original positions! Remove intake manifold, valve covers, rocker arm assemblies and pushrods. Remove the valve lifter guide retainer bolts, the retainer guides and valve lifters. Disassemble by removing the retainer ring with a small screwdriver, pushrod seat and oil metering valve, plunger and plunger spring, and check valve retainer from plunger, then remove valve and spring. After lifters are disassembled, all parts should be cleaned in clean solvent. A small particle of foreign material under the check valve will cause malfunctioning of the lifter. Close inspection should be made for nicks, burrs or scoring of parts. If either the roller body or plunger is defective, replace with a new lifter assembly. Whenever lifters are removed, check as follows: Roller should rotate freely, but without excessive play. Check for missing or broken needle bearings. Roller should be free of pits or roughness. If present, check camshaft for similar condition. If pits or roughness are evident replace lifter and camshaft. Assemble by coating all lifter parts with a coating of clean kerosene or diesel fuel. Assemble the ball check, spring and retainer into the plunger. Install plunger spring over check retainer. Hold plunger with spring up and insert into lifter body. Hold plunger vertically to prevent cocking spring. Submerge the lifter in clean kerosene or diesel fuel. Install oil metering valve and pushrod seat into lifter and install retaining ring. Prime new lifters by working lifter plunger while submerged in clean kerosene or diesel fuel. Lifter could be damaged when starting engine if dry. When a rocker arm is loosened or removed, valve lifter bleed down is required. Lifters must be bled down as possible valve to piston interference due to the close tolerances could exist. Before installing a new or used lifter in the engine, lubricate the roller and bearings of the lifter with No. 1052365 lubricant or equivalent. Install lifters and pushrods into original position in cylinder block. Install manifold gaskets and manifold. Position rocker arms, pivots and bolts on cylinder head. Install valve covers. Install intake manifold assembly.

In general, hydraulic lash adjusters are rather durable and do not require much attention to be paid to them. A noisy adjuster can be checked while the engine is running by putting a section of hose or tubing in contact with each intake or exhaust adjuster and listening to what is at the other end. As for the other ideas, touching each of the valve spring retainers with the finger, after the rocker cover has been unbolted, would lead to the feel of a bad adjuster through the shock as the valve seats down. If so, noise may be due with dirt got between the plunger and adjuster body when adjustments are correct. To get rid of the adjusters you have to eliminate the intake manifold with the valve cover and then, with the help of a lift rod pusher, you can pull each push rod out of the cylinder block. Where possible a special tool can be used to pull out the adjusters or a sharp scribe can be used to force up the adjusters instead using pliers on the adjuster body. Often, stuck adjusters can be released through the use of carb cleaner around the body of the adjuster and gently pumping the adjuster. It is also essential to store and label all the adjusters such that reinstallation of each adjuster is not mixed up with another. Once each of the adjusters is cleaned, one should look for either nicks or gauges, and if either of the two is present then replacement is required. The bottom contacting camshaft should be inspected for scratches as well as nicks and adjusters which should be replaced in case they show convexity due to wear. On the installation of the adjusters proper care must be taken in that they must be well covered with 'Molykote' or any equivalent product if the original adjusters are to be used again, they must be fitted to proper bore. Finally, replace all the valve parts and the covers, the valve cover, and the intake manifold.

Complete the installation by reversing the removal steps, and before starting the engine, change the oil and install a new oil filter.

Lifter extraction can be done with a special tool, a small magnet, or fingers on newer engines without varnish buildup. Avoid using pliers unless replacing the lifter.

The steps to remove the camshaft are as follows: 1. Remove the intake manifold. 2. Remove the rocker arms. 3. Remove the pushrods. 4. Remove the timing chain. 5. Remove the camshaft sprocket. 6. Remove the balance shaft drive gear. 7. Remove the fan, radiator, and condenser. 8. Store the lifters in a labeled box. 9. Remove the lifter retainer. 10. Extract the lifters from the bores using a special tool, magnet, or your fingers. 11. Remove the camshaft retainer plate. 12. Use three 6-inch long, 5/16-18 bolts as a handle to remove the camshaft from the block.

To determine the extent of cam lobe wear, position the number one piston at TDC on the compression stroke, remove the valve cover, and loosen the rocker arm nuts to access the pushrods. Then, mount a dial indicator on the engine, position the plunger against the top of the first pushrod, and zero the dial indicator. Slowly turn the crankshaft in the normal direction of rotation until the indicator needle stops and moves in the opposite direction, indicating maximum cam lobe lift. Record this figure and repeat the check for each valve.

To determine cam lobe wear, you should first position the number one piston at TDC on the compression stroke. Then, loosen the rocker arm nuts and pivot the rocker arms sideways. Afterward, mount a dial indicator on the engine and position the plunger against the top of the first pushrod. Zero the dial indicator and slowly turn the crankshaft in the normal direction of rotation until the indicator needle stops and begins to move in the opposite direction. Record this figure and repeat the check for each valve.

Long bolts or a single bolt can be threaded into the camshaft sprocket bolt hole(s) to assist in removing the camshaft.

Alternatively, measure the camshaft lobe height and base circle with a micrometer after removal to determine lobe lift.

Extracting the lifters can be done using a special tool, a small magnet, or even fingers on newer engines. Caution is advised against using pliers unless replacing the lifters, as they may cause damage.

After installing the camshaft, install the timing chain and sprockets. Lubricate the lifters with clean engine oil and install them in the block. Finally, change the oil and install a new oil filter before starting and running the engine.

Begin by removing the engine from the vehicle, followed by the valve covers and the intake manifold. Next, take out the rocker arms and pushrods, then remove the timing chain and sprockets, and subsequently the cylinder heads.

The initial steps to remove the camshaft are disconnecting the cable from the negative battery terminal and relieving the fuel system pressure.

To install the camshaft into the engine, slide the camshaft carefully into place.

To determine the extent of cam lobe wear, position the number one piston at TDC on the compression stroke, remove the valve cover, and loosen the rocker arm nuts to access the pushrods. Then, mount a dial indicator on the engine, position the plunger against the top of the first pushrod, and zero the dial indicator. Slowly turn the crankshaft in the normal direction of rotation until the indicator needle stops and moves in the opposite direction, indicating maximum cam lobe lift. Record this figure and repeat the check for each valve.

If reusing lifters, install them in their original bores, coating them with moly-base grease or engine assembly lube, and lubricate the bearing surfaces of the lifter bores with engine oil.

Various methods can be used to extract the lifters from the bores, depending on the specific situation and available tools.

During inspection of the camshaft, you should: 1. Clean the lifter and camshaft with solvent. 2. Check for wear and damage on the lifter and camshaft. 3. Measure the journals and cam lobes for wear. 4. Replace the camshaft and bearings if they are damaged.

The steps to remove the camshaft are as follows:1. Remove the intake manifold.2. Remove the rocker arms.3. Remove the pushrods.4. Remove the timing chain.5. Remove the camshaft sprocket.6. Remove the balance shaft drive gear.7. Remove the fan, radiator, and condenser.8. Store the lifters in a labeled box.9. Remove the lifter retainer.10. Extract the lifters from the bores using a special tool, magnet, or your fingers.11. Remove the camshaft retainer plate.12. Use three 6-inch long, 5/16-18 bolts as a handle to remove the camshaft from the block.

Lubricate the lifters with clean engine oil and install them in the lifter retainers, aligning the flats properly. For 2005-on 5.3L models, ensure the raised surface aligns with the notched area of the retainer.

The steps to remove the camshaft are as follows: 1. Remove the intake manifold. 2. Remove the rocker arms. 3. Remove the pushrods. 4. Remove the timing chain. 5. Remove the camshaft sprocket. 6. Remove the balance shaft drive gear. 7. Remove the fan, radiator, and condenser. 8. Store the lifters in a labeled box. 9. Remove the lifter retainer. 10. Extract the lifters from the bores using a special tool, magnet, or your fingers. 11. Remove the camshaft retainer plate. 12. Use three 6-inch long, 5/16-18 bolts as a handle to remove the camshaft from the block.

The steps for installing the camshaft are as follows:1. Lubricate the camshaft bearing journals and cam lobes with assembly lube.2. Slide the camshaft into the engine.3. Install the camshaft thrust plate.4. Install the balance shaft drive gear.5. Install the timing chain and sprockets.6. Lubricate the lifters with clean engine oil.7. Install the lifters in the block.8. Complete the installation in reverse order of removal.

When reinstalling used lifters, ensure they are placed back in their original bores, soak new lifters in oil to remove trapped air, and coat all lifters with moly-base grease or engine assembly lube before installation.

Lifters can be extracted using a special tool, a small magnet, or a machinist's scribe. Caution is advised against using pliers unless replacing the lifters, as they may damage them.

It is necessary to reach down into the cylinder block to remove the lifters.

Yes, these are AC Delco

These are sold individually, so only 1 lifter per order