N52 Magnesium rocker cover corrosion repair

[Jacko 2157]

Anyone successfully repaired a magnesium rocker cover before? Its seems theyre are the age where 95% of them are corroded. Most of them seem to blow holes down the coil tubes, and a couple blow out the inner mounting bolts. Im thinking grind out the rot, then treat in something, then rebuild with JBweld/Ali plug or something, then respray in something protective... Its not exactly structural but will need to be relatively temperature stable.

[Jacko 2157]

Think this one's terminal, the rot keeps going.. Black dust gone intergranular. Might just have to bite the bullet and spring for a new one 😕

 

 

[Michael. 2313]

4 hours ago, Jacko said:

Think this one's terminal, the rot keeps going.. Black dust gone intergranular. Might just have to bite the bullet and spring for a new one 😕

 

 

 

 

Is that not grounding spark plug damage? Sometimes the boots fail to insulate so the spark jumps to the alloy and damages it. Could be at play? 

 

[Jacko 2157]

4 minutes ago, Michael. said:

Is that not grounding spark plug damage? Sometimes the boots fail to insulate so the spark jumps to the alloy and damages it. Could be at play? 

 

Nah, well maybe in a few spots (or thats what blows the protective ali coating off and starts the corrosion), but others are around bolts etc.