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General Category >> Rubber Side Down! >> Painting engine, to primer or not
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Message started by TheProduct2007 on 10/01/13 at 13:11:10

Title: Painting engine, to primer or not
Post by TheProduct2007 on 10/01/13 at 13:11:10

Since I have the engine apart I figured I'd paint the cooling fins and casings, what prep do you take besides cleaning? Do I need heat resistant primer? What temperature proof? There is a heat resistant primer that goes up to 500 I believe

Title: Re: Painting engine, to primer or not
Post by Dave on 10/01/13 at 13:44:08

I would go with the recommendations of whatever product you choose to use...if they recommend primer then use one. A lot of the heat paints don't require one....some do. It also depends what surface you are working with.....bead blasted to clean metal or scuffed up original paint.

The temperature gauge on my cylinder stud has only been over 300 degrees on one 95 degree slow dirt road climb in the mountains.....most of the time the gauge reads in the 280 degree range.

Title: Re: Painting engine, to primer or not
Post by WD on 10/01/13 at 15:11:19

500 degree is fine. Primer if you want a smooth surface, paint only if you want it to be more as cast looking.

Be ready to deal with a LOT of casting flaws, fin edge height misalignments, fin thicknesses, etc. Stuff you never notice in the raw will drive you bug house once painted.

Especially if you plan to sand the fin edges clean, craptastic...

Title: Re: Painting engine, to primer or not
Post by TheProduct2007 on 10/01/13 at 16:15:53

For the muffler tip would I use 500 or 2000 degree paint?

Title: Re: Painting engine, to primer or not
Post by TheProduct2007 on 10/01/13 at 16:45:37

Can I use red rtv to make the valve cover gasket or do I need to use black?

Title: Re: Painting engine, to primer or not
Post by WD on 10/01/13 at 18:15:36

GRAY.

Muffler tip? Depends, mine is regular old BBQ paint, which is available now in silver and light bronze in addition to the standard flat black. 2000 degree won't cure properly. 500 will likely toast off. So you need 1200-1500 degree BBQ/woodstove paint. Close as your nearest Wallyworld, Ace Hardware, Home Depot, etc.

Title: Re: Painting engine, to primer or not
Post by justin_o_guy2 on 10/02/13 at 19:09:40

Aluminum requires a special primer,, its green, Regular gray primer like youd put on a car wont hack it,this stuff is an etching primer,check in anautomotive paint store, not a hardware stoire