The can says that the maximum temperature is 200F. Has anyone used this product under the hood [i.e. valve cover or air cleaner]?

Thanks!

 

Good question. I was looking at that hammartone paint this weekend as well, and noted the 200 degree restriction as well. Does someone have one of those fancy infrared thermometer and can check the valvecover temps on a running engine? It would be interesting to see how warm different parts get.

Ron

 

Probably fine on the air cleaner, but not so much the engine.

 

I borrowed a high-quality laser-gun thermometer and took some temperature readings on my engine. Here they are.

After driving for 6 miles (home from work), outside temperature ~80 deg F, with engine running at idle in driveway. Pointer of stock temperature gauge pointing at the "O" in "NORMAL" (where it always points when my truck is warmed up). 1986 300 I6.

Valve Cover: 133 deg F
Upper radiator hose: 152 deg F
Lower radiator hose: 114 deg F
Engine block between 2 central spark plugs: 195 deg F
Oil filter: 184 deg F
Intake manifold: 192 deg F
Exhaust manifold: 505 deg F
Catalytic converter: 505 deg F

Then I turned engine off, let it "heat soak" for 5 minutes, and measured again:

Valve cover: 164 deg F
Upper radiator hose: 183 deg F
Engine block between 2 central spark plugs: 199 deg F
Exhaust manifold: 251 deg F

Hope this helps. I certainly found it interesting and fun to take these measurements. Someone please let me know if they see a problem with any temperature.

 

Awesome info, Galendor. Reps to ya' for taking the time to do it, and then share it.

 

Great info!
Thanks for sharing.

Sorry the Rep god's have denied you.

 

Galendor,

I agree with 86fordtruck and left a "rep" for you.

Thanks for the well documented work... now I feel that I can safely paint the valve cover and air filter housing using the 200F paint.

Interesting temp. regarding the catalytic converter. I would have thought it would have been higher. How close is it to the exhaust manifold/header?

 

That temperature was at my 2nd cat - I have 2 of them inline! Maybe the first one is even hotter?