All about Ford Mondeo

Crankshaft - inspection
Engine removal and general engine overhaul procedures / Crankshaft - inspection


Note: Always check first what replacement parts are available before planning any overhaul operation; refer to Section 1 of this Part. A Ford dealer, or a good engine reconditioning specialist/automotive parts supplier, may be able to suggest alternatives which will enable you to overcome the lack of replacement parts.

1 Clean the crankshaft, and dry it with compressed air if available.

Warning: Wear eye protection when using compressed air! Be sure to clean the oil holes with a pipe cleaner or similar probe.

2 Check the main and crankpin (big-end) bearing journals for uneven wear, scoring, pitting and cracking.

3 Rub a penny across each journal several times (see illustration). If a journal picks up copper from the penny, it is too rough.

13.3 Rubbing a penny lengthwise along each journal will reveal its condition
13.3 Rubbing a penny lengthwise along each journal will reveal its condition - if copper rubs off and is embedded in the crankshaft, the journals should be reground

4 Remove all burrs from the crankshaft oil holes with a stone, file or scraper.

5 Using a micrometer, measure the diameter of the main bearing and crankpin (big-end) journals, and compare the results with the Specifications at the beginning of this Chapter (see illustration).

13.5 Measure the diameter of each crankshaft journal at several points, to
13.5 Measure the diameter of each crankshaft journal at several points, to detect taper and out-of-round conditions

6 By measuring the diameter at a number of points around each journal’s circumference, you will be able to determine whether or not the journal is out-of-round. Take the measurement at each end of the journal, near the webs, to determine if the journal is tapered.

7 If the crankshaft journals are damaged, tapered, out-of-round, or worn beyond the limits specified in this Chapter, the crankshaft must be taken to an engine overhaul specialist, who will regrind it, and who can supply the necessary undersize bearing shells.

8 Check the oil seal journals at each end of the crankshaft for wear and damage. If either seal has worn an excessive groove in its journal, consult an engine overhaul specialist, who will be able to advise whether a repair is possible, or whether a new crankshaft is necessary.


© 2018 www.fordmon.ru. All Rights Reserved.