estoma
.060 Over
- Joined
- Dec 11, 2020
- Messages
- 185
- Location
- Johannesburg, South Africa
- Ride
- Rocket 3R, VMX17, RC8-R, GL1800, H-D Breakout, R18
I noticed a hairline crack on the middle (#2) header almost two weeks ago.
The crack is approximately parallel to the engine face along the exhaust ports. Its jagged appearance indicates that it might well have started as a shorter (hydroforming-related) stress fracture from where it then propagated to its current length. It is about 18 mm (0.75") long now, and there is no local discolouration - indicating that probably only the outer exhaust layer has been affected. I measured it again earlier today, and it has not extended in the meantime. I have nevertheless notified Triumph SA that I might be knocking on their door for a replacement manifold should the situation worsen.
The crack is approximately parallel to the engine face along the exhaust ports. Its jagged appearance indicates that it might well have started as a shorter (hydroforming-related) stress fracture from where it then propagated to its current length. It is about 18 mm (0.75") long now, and there is no local discolouration - indicating that probably only the outer exhaust layer has been affected. I measured it again earlier today, and it has not extended in the meantime. I have nevertheless notified Triumph SA that I might be knocking on their door for a replacement manifold should the situation worsen.
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