Mack trucks has received reports from the aftermarket regarding oil leaks at the ccv housing inlet tube...
Mack technical service bulletin FSB 257-004A for 2015-2017 Mack Gu, 2015-2017 Mack Cxu and 2015-2017 Mack LR and others.
- Bulletin number
- FSB 257-004A
- Component
- Engine and engine cooling
- Summary
- Mack trucks has received reports from the aftermarket regarding oil leaks at the ccv housing inlet tube and at the split line between the upper and lower housings on chassis builds between january 1, 2014 and january 26, 2016 with mp7 engines. It has been determined that the o-ring installed on the inlet tube is the source of the leak and oil may leak down the back of the housing giving the impression that the housing split line is also leaking.
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