Engine heat sucks

[Daniel Young]

I painted my plastic engine cover last week with 900 degree paint. Heck I thought that 900 degree paint would be plenti enough. Too my surprise it wasn't. I let it dry and sit in my basement for two nights and put it on. In one day and only 25 miles it cracked and peeled. Pisses me off that I'll have to sand it down again and repaint it with a higher temp threshold. I heard that our engines run hot but I figured that 900 would be enough. Am I stupid or was it just a hard lesson learnt?

 

[Black Majik MSP]

I painted my engine cover with like 500 degree paint & it was fine. Not sure what your problem is, but I live in FL, so I doubt it could be hotter there than it is here. Anyway, I have since swapped my engine cover & valve cover for a P5 valve cover that I will be painting soon.

 

[jersey_emt]

Hmmm, I have regular paint on the plastic cover.....for about 8 months now, no cracking or peeling. Did you use any primer? Sand down the cover before painting it? Make lots of extremely light coats instead of one thick coat?

 

[RenzoMSP]

Maybe the paint isnt meant to bond to plastic. What kind of paint are you using.

 

[Black Majik MSP]

I didn't even sand mine down or use primer & it was fine. Duplicolor Metalcast with the metallic silver base coat & the red top coat.

 

[Daniel Young]

I did sand it down with like 400 grit sandpaper and than lightly with a scotch pad. And I mad many light coats, but no I didn't use primer. You maybe right RenzoMSP, but I don't belive the can said anything about it bonding to plastic. It wasn't really bad just around the front ridges. It's just not acceptable for me to look at. I may have put too many coats on it. Who knows. I just thought I read a thread a while back about our engines putting out a lot of heat and figured thats what had done it.

 

[Witchdoktor]

Maybe the paint isnt meant to bond to plastic. What kind of paint are you using.

that would be my guess too, wrong paint