28-12-2020, 10:09 PM
Hello Tom
I went through the same question about the oil feed to the timing gears a short while ago. I decided to leave the feed through the bush standard having decided that the back pressure created would not increase the oil going through the jets to the crank, and in fact could reduce it. My engine is a bog standard splash fed two bearing. If you're pressure fed it's a totally different situation.
While you have it all apart, and if you still have the Austin square headed pin locating your cam shaft front bush, it may well be worth reworking this to take a 5/16 thread into the bush itself. The original pin tends to wear, along with its thread in the crankcase, and allows axial movement of the bush and an oil leak up the pin. The new bolt can be sealed with a dowty seal onto the top face of the crankcase.
Colin
I went through the same question about the oil feed to the timing gears a short while ago. I decided to leave the feed through the bush standard having decided that the back pressure created would not increase the oil going through the jets to the crank, and in fact could reduce it. My engine is a bog standard splash fed two bearing. If you're pressure fed it's a totally different situation.
While you have it all apart, and if you still have the Austin square headed pin locating your cam shaft front bush, it may well be worth reworking this to take a 5/16 thread into the bush itself. The original pin tends to wear, along with its thread in the crankcase, and allows axial movement of the bush and an oil leak up the pin. The new bolt can be sealed with a dowty seal onto the top face of the crankcase.
Colin