J 7872 Magnetic Base Dial Indicator
For equivalent regional tools, refer to Special Tools.
Warning: Refer to Safety Glasses Warning in the Preface section.
If the camshaft retainer plate is damaged, replace as necessary.
The camshaft bearings have an interference fit to the engine block camshaft bearing bores and must not be loose in the engine block camshaft bearing bores.
Note: If any camshaft bearing is excessively worn or scored, replace all the camshaft bearings.
• | Worn, scored, or damaged bearing journals (1) |
• | Worn engine camshaft lobes (2) |
• | Damaged bolt hole threads (3) |
• | Damaged camshaft sprocket locator pin (4) |
If the camshaft journals are more than 0.025 mm (0.0010 in) out-of-round, then replace the engine camshaft.
8.1. | Mount the engine camshaft in a suitable stand between centers. |
8.2. | Use the J 7872 indicator in order to check the intermediate engine camshaft journals. |
If the runout exceeds 0.065 mm (0.0026 in), the engine camshaft is bent and must be replaced.
9.1. | Place the engine camshaft on the V-blocks. |
9.2. | Use the J 7872 indicator in order to measure the engine camshaft lobe lift. |