pi5tolpete

While the engine will be off with the guru for a few months over winter, I decided to keep a few bits here to work on. I have glass beaded the engine tin and painted with high heat paint. Now I plan to paint the valve covers and this is what I'm looking at:
Scuff the paint surface with bristle pad or other to give the stripper some bite
Chemical stripping to loosen the paint to reduce the blasting erosion
Wash thoroughly several times
Bake at 200c to flash any moisture in the metal
Light coats of self etching primer while still warm
High temp enamel paint followed by recommended oven cycles
Possible clear coating if I don't go with wrinkle finish

Any suggestion on any of the steps?

HiWind

Why not just stripper ... Bead blast ... Powder coat?

pi5tolpete

Would 993 valve covers fit the 964. I'm looking at a set of CNc machined ones

HiWind

Check yours are true ie flat - use a marble or glass surface ... If not warped, they shd be fine
Else rennline make billet Cnc 964 ones ... See my development journal thread's last update

Goughary

Mine (hargett billet) were shot w high temp black satin enamel. They are pealing a little. Powder coat would last longer. But don't powder coat the insides of billet covers. Can't speak for the mag covers since they seem to fall apart. Mine were horrible.

cobalt

If you have the magnesium covers you will need to clean them thoroughly a Dow 7 treatment would be best but costly to send out and have done.

If you glass bead them you will want to wash them first and they dry in a warm oven around 100 degrees with circulation to dry. Coat them with primer (preferably high temp)at least 1 hour after blasting and then apply a nice high temp paint. The more time exposed to the atmosphere the quicker the corrosion will start to occur.

toma8344

I am having my 1991 C2 cap with trip engine overhauled and using a sating high heat paint on as many surfaces that need attention. I reason being it helps to dissipate heat which these engines need help with.
Satin black high temp paint will work best add to what you have without going too crazy. Chrome and thick clears will keep heat in. I am just keeping it simple. Good Luck

pi5tolpete

Never mind. They are way different. Fyi, a nice set of cnc lower covers for a 993 on eBay for $200

pi5tolpete

So I have the uppers glass bead blasted and cleaned nicely. I dusted the insides to remove only loose paint. I stuck blue tack in the gasket grooves to protect them during the blasting. I then heated the covers in the oven at 200F for 20 minutes to dry and gas off the metal. I then hit them with duplicolor self etching primer to bite into the metal and seal them so I can take time to determine the high heat paint I'll use. I have been thinking of rankle paint but may just stick with a grey silver look. Then it's baking time!

pi5tolpete

Before


Out if the oven

HiWind

nice Pete .... do you have pics of the flaky ones too?
and in the pic above is that what's below the paint?

pi5tolpete

Thanksgiving barbecue. On the menu is engine tin today.

pi5tolpete

Boy did that ever not work out like I was hoping...

greg1990964

Was the primer high heat paint?

pi5tolpete

The primer was self etching but doesn't read high heat anywhere. That could be my issue. I'll look for a high heat metal primer. Hard to hind one for Al or Mg though.