1942 - 1947 Chevrolet Shop Manual



	6-10

		tion and endwise movement. They are accurately line reamed at the time of assembly, assuring proper alignment of the camshaft. These bearings are lubricated through holes which line up with the oil passages leading from the main bearings. To remove, replace, and line ream the camshaft bearings in service; a set of special tools is necessary. This set consists of a removing and replacing bar, four removing and replacing sleeves, a bracket which is attached to the rear of the cylinder block and a special camshaft bearing reamer shown in Fig. 16. These are the same tools that have been used since the 1937 model for replacing camshaft bearings.

		Fig. 16—Camshaft Bearing Removing and Replacing Toots 1 Reamer 4 Extension Handle 2 Removing and Replacing 5 Bracket Bar 6 Handle and Thrust 3 Removing and Replacing Bearing Sleeves 7 Staking Tool Camshaft Bearing Removal 1. After removal of the camshaft, drive out the expansion plug from the cylinder block at the rear of the rear camshaft bearing, by driving it out from the inside. 2. Assemble the camshaft bearing remover bracket loosely to the rear of the cylinder block. 3. Start the bearing puller bar through the front bearing and install the puller sleeve for each bearing over the bar before it passes through that particular bearing. Then pass the bar through the hole in the bracket. Tighten the bolts that hold the bracket to the Crankcase. Then install the thrust bearing and puller handle on the end of the bar. 4. Turning the puller handle clockwise will now remove all four bearings at one time. An extension handle is provided to aid in starting bearings that may have corroded in the case. Camshaft Bearing Replacement 1. To make sure that the oil holes in the camshaft bearing bores will line up with the oil holes in the camshaft bearings after the bearings have ■ been installed, mark the position of the oil hole in the bore on the front face of the bearing bore.
	Fig. 15-Checking Crankshaft End-Ploy (turning it by hand) with the bolts pulled down tight. Then replace one .002" shim on one side for clearance, again tighten the bolts and check for drag. The crankshaft should now roll freely without any indication of a drag. Loosen the bolts on the bearing that has just been adjusted and proceed to adjust the next one in the same manner and so on until all bearings have been adjusted. When adjusting the bearings, shims should be removed evenly. If an uneven number of shims have to be used, it is good practice to have the greater number of shims on the same side of all bearings. By following the procedure of removing shims to check and then replacing one .002" shim, there will be no possibility that the bearing will be too loose. Then if the crankshaft may be turned freely by hand, it is certain that the bearing is not too tight. If the shaft turns freely by hand, after all bolts have been tightened, you know the bearings are properly adjusted. CAMSHAFT BEARINGS All four of the camshaft bearings are steel backed, babbitt lined. They are pressed into the crankshaft and staked into place to prevent rota-