The coil seems to be prone to cracks and following faults, or if you are as clever as me and clean the engine with running water and get trouble after
You'll need:
- Sikaflex (or similar)
- WD 40
- Compressed air (or a compressor/airgun)
1. Remove the coil
2. Clean it with some WD
3. Locate the cracks
4. Spray a generous amount of wd in all cracks.
5. Clean by blowing air in the cracks
6. Repeat 4
7. Clean around the cracks so the Sikeflex will stick
8. Apply Sikaflex to close the cracks
9. Remount the coil and test. Might take a drive to be completely fixed.
I've done this on two different coils, one I damaged with water while washing, the other one was bad when I got it and was left unused for 6 months before I did this. Both been working perfectly for months now.