Fitting Piston Rings

Piston rings are of two types - compression (plain face) and oil control ring. The two compression rings

Figure 3C-6. Measuring Ring Side Clearance are positioned in the two upper piston ring grooves with the stamped word "TOP" or a dot (.) upward. Rings are regularly supplied in the following over-sizes to fit standard oversize pistons: .010, .020, .030, .040, .050, .060 arc! .070 in.

Compression rings must have proper side clearance in ring grooves. Check with thickness gauge as shown in Fig. 3C-6. Ring gap (space between ends) must also be as specified, see "Specifications", Section 3A.

Figure 3C-5. Measuring Piston Revised* 5-68

Figure 3C-5. Measuring Piston Revised* 5-68

Figure 3C-7. Checking Ring Gap

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