will paint affect cooling???

[DEVINF450R]

My brother and I are wanting to paint thehead on his 400ex. will the paint affect the air cooling enuff to hurt?

[theTman]

i painted my whole 400ex motor when i had it, worked fine

[bradley300]

paint will insulate, holding heat in. i doubt the effects are too bad. blasters for instance are painted plack from the factory

[Quad Dude]

paint will insulate, holding heat in. i doubt the effects are too bad. blasters for instance are painted plack from the factory

thats not really all that reasuring because blaster are junk and blow up alot. at least all the ones i have seen

[Iliketogofast]

Powdercoating is much more trick.

And if the blasters blew up because of overheating cause the head was insulated by the heat, they would have changed it.

Your motor isn't going to get any hotter than if it had a thin coat of mud over it.

[Sjorge450R]

Originally posted by Iliketogofast
Powdercoating is much more trick.

And if the blasters blew up because of overheating cause the head was insulated by the heat, they would have changed it.

Your motor isn't going to get any hotter than if it had a thin coat of mud over it.

I wonder how much hotter my engine got from running like this?

[ww228king]

DID YOU TRY TO GIVE YOU MOTOR A COOL MUD BATH OR A HOT MUD BATH....LOL

[250R-Dee]

If you are worried about cooling problems get paint that is made for aluminum parts or radiators.

i want to paint mine or something it looks like CRAP any spary paint i can use?

grill paint

http://img82.imageshack.us/img82/9964/dscf00030ic.jpg (http://imageshack.us)

[Sjorge450R]

Originally posted by ww228king
DID YOU TRY TO GIVE YOU MOTOR A COOL MUD BATH OR A HOT MUD BATH....LOL

nah, thats just how muddy my races get.

[aviator4]

I would have to say DON'T USE SPRAY PAINT... thats been my experience.

I painted my engine with the silver "heat paint" - let it dry, then fired the engine up to "cure" the paint. First time I went to change my jetting and dripped fuel on the paint, off it came.

The cylinder was great until it got muddy again. I have to deal with Oklahoma Red Clay and it sucks. The red clay tinted the paint and it looked horrible.

During my rebuild, I opted NOT to paint it again... it looked like HDS after about 6 months of ridng.

If you really want to do it right, powdercoat is the way to do. The heat build up is nomial. (10 degree difference between a non-painted engine and a powdercoated RED engine - thats what we measured)

[250R-Dee]

If you want the paint to stay on the motor you will need to properly PREP the pieces to be painted. I serious doubt if you will be able to prep the peices the correct way of the parts are still on the motor.

clean the parts - pressure wash and was with a soap water
or media blast the items
Use paint that does not require primer and apply with thin coats
bake the part in an oven 30~45 minutes at 400*

This what I did for some of my 3 wheeler parts. On non-engine parts I used a clear coat for ATV's. :)

[1fst400]

fresh media blasting makes it look nice.

[Iliketogofast]

Sand and/or glass blasting might be an easier alternative to sanding, but keep in mind the blaster leaves a residue that you will have to sand off anyway.

So either way, you're going to have to sand.