This is a pic after I cleaned the engine like I have seen in a few posts on here. After though I still noticed yellow marks on the intake plenum. I am thinking it must have been factory rust proofing but it didn’t like the look of it.






I removed the rust proofing with STP supper clean degreaser and lots of scrubbing. After removing the rust proofing it looked a lot better but I still noticed some tarnishing marks on the plenum that was bothering me.



So I used a Meguirars metal polish a dermal, lots of scrubbing and 2 hours latter it looked like this.



I have seen some realty nice plenums on here that looked like they were sanded and polished to a mirror finish or chromed but I didn’t want to get into that right now.

 

Good work.

As for the mirror finish plenums, you'll find information here:
https://my350z.com/forum/southern-california/294406-socal-polished-plenum-locals-only.html

 

why did you get me to look at those, i am not as happy with mine now ha ha

they look good, i guess thats after alot of sanding then polishing. I am going to do that if i can get a space plenum

 

spare plenum i mean

 

Get it really polished as mine looks like this.