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Lab Rat
GenIII
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10/19/2002
19:38:24

Subject: 4.7 Valve Covers
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Anybody tried to get theirs polished? I've heard they're magnesium which is nasty stuff to cut or grind on, but they'd look really sharp all buffed out.

Thanks for any input.

Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!

D
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10/19/2002
20:55:36

RE: 4.7 Valve Covers
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I think Bernd was selling polished a while
ago. you might want to check with
premierautomotive.net I think they sell them
aswell.

2001 4.7 CC auto
shaved door handles & tailgate
welded Sir Michaels roll pan
DJM drop 3/6
airaid intake
180 stat, ported-polished TB
Dynomax 3" dumped carsound cat
HO cams/manifold, Sure Grip & 3.92's collecting dust!

Lab Rat
GenIII
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10/20/2002
16:34:29

RE: 4.7 Valve Covers
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Thanks, D.

Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!

DMSDAK
Dodge Dakota
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10/21/2002
01:11:12

RE: 4.7 Valve Covers
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Isnt Magnessium the stuff that they sell at camping supply stores to help start fires? Why is this such a good application on a hot motor? Dosent it really flame up if burning and water is added? I dunno maybe Im thinking of another element?



Demon-Xanth
Dodge Dakota
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10/21/2002
10:07:39

RE: 4.7 Valve Covers
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My mom used to work at a plant that made chainsaw parts, many out of magnesium. Athough it IS flammable, it doesn't easily ignite. Once ignited you'll need halon or PKP to put it out, CO2 and water won't fly. The reason why it's good is because it's very strong and light. There used to be rims available in magnesium (hence the term "mags")



Dominic
Dodge Dakota
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10/21/2002
10:47:16

RE: 4.7 Valve Covers
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I would suspect that the valve covers are made from a magnesium alloy much like the mag rims. Pure magnesium is way too soft to be used in these applications. That's why they mix it with other metals to form a light-weight and strong metal alloy. Same goes with aluminum alloy rims.

-Dominic



Demon Dakota
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10/21/2002
10:58:20

RE: 4.7 Valve Covers
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Demon-Xanth,

As a former Naval Aviation guy, I can absolutely tell you that magnesium can not be put out with halon or purple k powder (pkp). It has to be deep sixed. Remember that it creates it's own oxygen as it burns. Navy aircraft wheels are made of magnesium, and if you lock the brakes on landing they can and sometimes do go off like roman candles.

K&N Drop in AF
True Dual exhaust and removed third cat
HO Cams & HO Intake
Modified TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod

Lab Rat
GenIII
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10/21/2002
11:14:18

RE: 4.7 Valve Covers
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Mag has been known to flash during heavy machining operations with no coolant.

One good example is when the CART guys go into a wall wheel or gearbox first. You can see the flash fire real good during slow-mo playback.

Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!

Demon-Xanth
Dodge Dakota
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10/21/2002
11:41:56

Magnesium fires
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For some reason I thought those two could, I know water does not. I'm pretty sure sand can contain it though. On a navel vessel I'd just use a hose to push the item over and let the fish deal with it :)

My grandpa has scars on his back from when a mold had a drop of water in it when they poured in the molten metal, the water basically caused an explosion since it boiled instantly. Working in a factory making metal assemblies isn't a fun job.

(thank god I make medical equipment for a living)



Lab Rat
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10/21/2002
11:51:03

RE: 4.7 Valve Covers
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Metal foundries and mills are nasty places. We have our own aluminum die casting plant onsite-I've never set foot in it for reasons like what happened to Demon's grandfather. One cup of water in the wrong place and BOOM.

Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!

GstRdr1
Dodge Dakota
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10/21/2002
13:52:12

RE: 4.7 Valve Covers
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You may want to check with Jonas @ Premier Automotive. If I remember correctly he was doing a polised valve cover eschange for the 4.7.



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