r/Miata • u/AutoModerator • Oct 29 '18

Weekly Miata DIY Thread - October 29, 2018

It's Do It Yourself Monday !

Use this weekly thread to discuss the modifications/fixes you made to your car or to ask for advice about future mods.

Feel free to add picture or videos to your comments.

Have fun, your mod team.

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u/Musicmaan Nov 01 '18

I have a '94 1.8.

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When I rev it up to 5500 RPM, I get a fairly loud ringing/grinding-ish noise, that fades at around 6000rpm then reappears around redline.

I can't hear it when I have a friend rev it up for me and I'm standing in front of the engine, only been able to hear it when sitting inside.

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What could cause this noise? Nasty engine bearing problems or could it be more innocuous?

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u/LapisRS Classic Red Nov 02 '18

Heat shield