Engine_2014 : Motor Plants and Auxiliary Boilers - 2429/2614
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| When checking the underside of the valve cover shown in the illustration, you find localized black patches. You should suspect __________ . |
| A) worn valve locks |
| B) loose tapered collars |
| C) a damaged inner valve spring |
| D) worn exhaust valve guides and seals |
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Illustration MO-0043
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