18-07-2018, 09:35 AM
(This post was last modified: 18-07-2018, 09:46 AM by Ruairidh Dunford.)
Last year a friend phoned from Austria reporting high oil pressure following a stop and some furtive intervention to the jets by others on the trip - never let anyone touch your engine unless you know they are capable!!
I advised my friend to lance the jets which they eventually succeeded in doing with very thin fuse wire. They continued on their journey back to the U.K. but the oil pressure failed to drop and we were left scratching our heads.
Once home, with the help of some surgical pliers and a dentist’s mirror, I removed the end of a paper clip
That had snapped off inside the front jet. Oil pressure returned to normal immediately but they had travelled around 600 miles like this without ill effect. I shared the story with a forum member who said that he had always thought the mist in the crankcase played a significant role in lubricating the big ends over the jet aim.
We spend a long time setting up jet alignment in calm conditions, I have often wondered how much of that alignment remains at 3000rpm (and beyond) with just 3-5psi.
And then there are the number of people who simply exchanged their broken crank for a Pheonix without a thought for jet alignment, Austin crank troughs and holes are quite different in placement...
I advised my friend to lance the jets which they eventually succeeded in doing with very thin fuse wire. They continued on their journey back to the U.K. but the oil pressure failed to drop and we were left scratching our heads.
Once home, with the help of some surgical pliers and a dentist’s mirror, I removed the end of a paper clip
That had snapped off inside the front jet. Oil pressure returned to normal immediately but they had travelled around 600 miles like this without ill effect. I shared the story with a forum member who said that he had always thought the mist in the crankcase played a significant role in lubricating the big ends over the jet aim.
We spend a long time setting up jet alignment in calm conditions, I have often wondered how much of that alignment remains at 3000rpm (and beyond) with just 3-5psi.
And then there are the number of people who simply exchanged their broken crank for a Pheonix without a thought for jet alignment, Austin crank troughs and holes are quite different in placement...