Alero L4-144 2.4L DOHC VIN T SFI (2000)
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The sprocket
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The keyway and the threads
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The camshaft position sensor reluctor
26. Inspect the camshaft bearing surfaces and the camshaft lobes for the following damage:
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Wear
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Galling
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Gouges
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Overheating or discoloration
27. Measure the bearing journals diameter with a micrometer. If out of specification, replace the camshaft.
Installation Procedure
1. Install the camshaft housing to the cylinder head with a new gasket.
Sealer is unnecessary.
2. Loosely install the cylinder head bolt on camshaft housing in order to hold the housing in place.
Notice: The camshaft lobes and the journals must be adequately lubricated or serious engine damage will occur upon start up.
Important: Return all used lifters to the original position in the camshaft housing. If you replace the camshaft, replace the lifters which are
actuated by the camshaft.
3. Install the lifters into the lifter bores.
4. Install the camshaft in the same position as removed.
Set the timing chain sprocket dowel pin straight up. Align the pin with the centerline of the lifter bores.
Important:
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If you installed a new camshaft, add Engine Oil Supplement GM P/N 1052367 or the equivalent to the engine oil.
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Coat the entire camshaft with Camshaft and Lifter Prelube GM P/N 12345501 or the equivalent.
5. Install the new camshaft housing to the green-colored cover seals and into the cover.
Sealant is unnecessary.
6. Remove the bolt holding the housing in place.
7. Apply the pipe sealant GM P/N 1052080 or the equivalent to the camshaft housing and to the threads of the cover retaining bolt.
