Need special bolts and mod bolts??

[mitecl96]

Not sure where I would post this topic but move if needed.

Okay, I am working on a cheap little project to dress up the engine bay a little. I'll have pictures up on my build thread when I get it all figured out.

My first problem

I am about to replace my valve cover and me and my friend got to thinking. I bought a shaved valve cover what can we do different. We came up with something and I ordered what I needed.

What I need to figure out. My valve cover bolts have a stud sticking out the top. The thread size of it is a M5, (420a by the way), the threads in what I ordered is a M4. Is there a way I can rethread a bolt to a smaller size or is that impossible. In my case, thread a M5 to a M4 bolt. I know I can rethread the part but it is impossible to hold it while I drill it with out messing it up.


My next question is

Does this bolt exist or can I get it made. It doesn't need to be strong.
I need a regular bolt M6 with 50mm length, but than a M4 or M5 stud on top the head. Similar to my valve cover bolts.

 

[knochgoon24]

Look into helicoils and tineserts.

 

[mitecl96]

Helicoles won't help me. That has to do with stripped threads or make the threads smaller in the hole.

What I needs so to make the bolt smaller. The bolt is a M5 and the bolt needs to be a M4.

 

[Gerg]

Helicoles won't help me. That has to do with stripped threads or make the threads smaller in the hole.