Quote:
Originally Posted by SHEEDI
Hey Bro,
Welcome back on e90post  , few questions......so how often N54 engines need walnut blast? before installing jb4, what parts need to be addressed/replaced? |
It really depends, I did mine at 45k miles and again at 95k miles. I started getting the 1/2 engine light at about 90k miles and tracked down the issue using the process I listed above. My issue was solved when I did the carbon blasting but mine wasn't that bad from what ZNM Auto said when they did my blasting.
Nothing needs to be done before installing the JB4, the only thing that might happen is it will show you your cars weaknesses which would probably have shown up later (a little sooner). But it won't cause any problems. It's usually better to replace things as needed or on a schedule (or in my case, anytime your already digging into a car... change stuff to save on labor).
Also if you want a JB4 G5, my friend just sold his 335 and has one available.
- Faz