Camshaft install tips and tricks
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(→Installation and Pre-lube) |
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Molybdenum disulphide will actually bond with the metal and give maximum protection to the lifter crown/lobe. Use the 'moly' lube on the distributor gear, cam lobes and the lifter foot that contacts the lobe only- '''not''' the bearing journals, and '''not''' the sides of the lifters. Engine oil or ATF can be used on the lifter bores or lifter sides, and the pushrod cups. | Molybdenum disulphide will actually bond with the metal and give maximum protection to the lifter crown/lobe. Use the 'moly' lube on the distributor gear, cam lobes and the lifter foot that contacts the lobe only- '''not''' the bearing journals, and '''not''' the sides of the lifters. Engine oil or ATF can be used on the lifter bores or lifter sides, and the pushrod cups. | ||
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'''5. Failure to verify "lifter spin" on flat-tappet lifters.''' | '''5. Failure to verify "lifter spin" on flat-tappet lifters.''' | ||
With the camshaft and lifters installed, but before the timing chain is attached or the pushrods are installed, mark each lifter and lifter bore with a "Sharpie" or other marker. A simple stripe on the lifter bore aligned with a dot on the visible part of the top of the lifter is fine. Rotate the camshaft several revolutions, and assure that the lifters spin in the bores, as noted by the increasing mis-alignment of the dot on the lifter relative to the stripe on the lifter bore. The lifters may not all spin the same amount--some will spin more than others--but they must all show some rotational movement as the cam spins. The only exception to this that I'm aware of is Buick "Nailhead" V-8s, which (at least in OEM form) have no crown on the lifter foot, no taper on the cam lobe, and no offset between lifter bore and cam lobe. The Nailhead lifters are NOT intended to spin. | With the camshaft and lifters installed, but before the timing chain is attached or the pushrods are installed, mark each lifter and lifter bore with a "Sharpie" or other marker. A simple stripe on the lifter bore aligned with a dot on the visible part of the top of the lifter is fine. Rotate the camshaft several revolutions, and assure that the lifters spin in the bores, as noted by the increasing mis-alignment of the dot on the lifter relative to the stripe on the lifter bore. The lifters may not all spin the same amount--some will spin more than others--but they must all show some rotational movement as the cam spins. The only exception to this that I'm aware of is Buick "Nailhead" V-8s, which (at least in OEM form) have no crown on the lifter foot, no taper on the cam lobe, and no offset between lifter bore and cam lobe. The Nailhead lifters are NOT intended to spin. | ||
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'''6. Failure to use an extreme pressure lubricant additive in the engine oil for camshaft break-in.''' | '''6. Failure to use an extreme pressure lubricant additive in the engine oil for camshaft break-in.''' | ||
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