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| Joined: | 12-17-2009 |
| Location: | Hailey, Idaho USA |
| Posts: | 83 |
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Was this for the earlier (MK I, I think) engines?
The bulletin is JH 74-17
Subject: Oil Pressure Delay
To decrease the oil pressure build up time, an air bleed hole has been incorporated in production at serial number 14875 on the pressure side of the oil pump body in the auxiliary housing. This bleed hole will allow air trapped in the oil galleries to be pumped out, therefore assist in oil pump priming.
The bulletin gives details on how and where to drill the hole.