Hydraulic Roller Cams & Lifters For Non-Factory Roller Lifter Equipped Engines PDF Installation Manual


Clean the camshaft with mineral spirits or equivalent solvent and coat lightly with engine oil. As with all roller camshafts, do not apply moly assembly lube to the cam lobes or roller tappets. We recommend a thin film of our Pt. No. 99008-1 Engine Assembly Lube be applied to the lobes of the cam and bearing journals. A small amount of Pt. No. 99002-1 Moly Assembly Lube should be applied to the distributor gear, cam gear, and ends of the fuel pump pushrod.

Roller cams in Chevy engines require the use of a cam button spacer to control camshaft end-play. The large end of the spacer fits in the large hole in the center of the camshaft sprocket and against the front of the cam. It is held in place by the cam bolt locking plate. The other end contacts the inside of the timing cover. In most cases, no machining is required. However, if you are using a late-model stock type aluminum cam sprocket, you may need to machine the gear to fit the large end of the spacer. Check camshaft end-play and maintain between .005” and .008”. This must be checked with the timing cover and gasket in place, just as it would be after final assembly, without the roller lifters installed. Engines that were originally equipped with thrust plates, (such as most Ford and Dodge-Plymouth models) should use the factory recommended end-
play specifications. Camshaft end-play is best checked with the engine out of the vehicle and mounted on an engine stand. The welch plug that seals the back end of the cam bore must be removed to access the rear of the cam.

Mount a dial indicator at this location to measure camshaft end-play. Carefully pry the cam forward and backward by using a large screwdriver inserted into a lifter bore where a lobe on the cam would be at full lift. Do not chip or scratch the cam lobe or lifter bore. If the engine is in the vehicle, there is no suitable mount for a dial indicator to detect cam end-play. It will then be necessary to make an educated guess as to the amount of end-play. A slight forward-backward movement, by feel, is all that is necessary. It may be necessary to dent out the center of the timing cover slightly in the area that would contact the spacer, to gain correct end-play. This can be done using a socket or equivalent diameter punch that is the same outside diameter as the small end of the spacer. Some aftermarket covers have been flattened in the spacer contact area and are not suitable for use. If excessive clearance is indicated, you may use a thinner timing cover gasket or a spacer behind the cam button spacer, to reduce the clearance.

Install the Crane hydraulic roller lifters using a high quality engine oil. For best results, briefly submerge each pair of lifters in a container of fresh, clean oil just prior to installing them in the lifter bores. Make sure that the locking bars (high side of the lifters) face the center of the engine block valley. NOTE: For all Chrysler-Dodge-Plymouth “LA” 273- 318-340-360 engines (using stock 59° lifter bore angles), install the Crane hydraulic roller lifters with the locking bars facing the adjacent cylinder, away from the center of the engine block valley.

It is advisable to check cam timing according to your cam specification card, especially the opening and closing specifications at .050” cam lift. This is accomplished by using a dial indicator and a degree wheel. Complete detailed instructions for this procedure can be obtained by contacting Crane Cams direct at: 386/258-6174, FAX: 386/258-6167. Crane offers timing sets with multi-index keyways and offset bushing kits to make any necessary cam timing changes. Always remember to re-torque cam bolts. On Chevy applications, bend the appropriate tabs on the Cam Bolt Locking Plate, one per tab, per bolt, to prevent cam bolts from loosening.

For the best reliability and performance, we highly recommend the use of our High Intensity or Gold Race aluminum rocker arms. If you use stock type, stamped steel rockers we highly recommend you use our extra-long slot rockers, where applicable. Install the pushrods and rockers one cylinder at a time. Fill the pushrods with oil using a squirt can as you go. Do not install the rocker arm adjusting nuts until you begin the adjustment procedure as outlined below. We recommend that you perform this work with the intake manifold off, to make sure that the pushrod is properly seated. Adjust the rocker arms as you go.

Download Hydraulic Roller Cams & Lifters For Non-Factory Roller Lifter Equipped Engines PDF Installation Manual

 


Filed Under (Chevrolet, Engine Manual) by m4d35 on 22-01-2010
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Comments:

  1. Cherry Picker Rental said...

    Thanks for a terrific thought.

    Posted on 20 Jul 2011 at 10:55 am

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