This is one of the frequent reasons for oil seal failure, and this is majorly because of the volatility of any of the elastomer’s constituents. These causative constituents may be part of the elastomer formulation, or gases that got entrapped in the elastomer during the molding process. The deceiving fact about this failure is that sometimes the oil seal won’t show any visual sign of out-gassing, however, sometimes when the out-gassing is extreme, they shrink.
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2025-08-16 05:58
486
...
2025-08-16 05:50
1405
...
2025-08-16 05:42
2914
...
2025-08-16 05:39
165
...
2025-08-16 05:31
2757
...
2025-08-16 05:15
2263
...
2025-08-16 04:45
2677
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2025-08-16 04:11
187
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2025-08-16 03:45
1576
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2025-08-16 03:18
2229
Standard Sealing Lip Designs
- 3. Compression set Compression set is the permanent deformation that occurs when a material is subjected to constant pressure over a period of time. High temperature rubber gaskets have low compression set, which ensures that they maintain their shape and seal effectively over time.
Refit the sump, taking great care not to disturb the gasket. Hold it up by hand and fit two front bolts and two rear ones to keep it in place while you refit the rest.


4. Fluroelastomer also popularly known as Viton. – The high temperature resistant material used in places where temperature is more than 120 Degree Celcius.
<Seal selection example>
Based on the above flowcharts, the oil seal type that meets the requirements shown in Table 3 would be the type code MHSA or HMSA shown in Table 4.