Spent a few hours checking the offside front brake calliper and noticed the steering knuckle was quite rusty,the disc shield was rotted and fell off, there was about 1.5 mm thickness  of scale rust on the casting so it was removed with wire brush and scraper, hammer and old wood chisel.

My question is this acceptable for safety as obviously it has lost some strength although it looks ok , but how do i tell?,or do I replace both sides along with associated bearings.

Any advice would be great. 

Martin

 

It'll be just fine.

Rust is much bigger than the metal it started out as.    

A quick google suggests that the volume of rust is about 6 times as large as the parent metal it grew from.  

 

So, as above, no concern.

 

 

Hi Sepulchrave and Wino, I did think that rust was expanded so to speak and am now confident it's OK to keep them, I want to give them a proper more thorough cleaning up and paint them, would hammerite be OK or should it be heat resistant paint.

Thanks both.

Martin.

Anything would do, I think.

Couldn't bring myself to bother, personally. Horrible thing to try to clean up well, and virtually nothing to gain from having done it.