JFCIII

I saw the Trucks show on spike yesterday also the product they used was zoop and was suppose to keep the shine for 2 years. I would check with the company and see what they say.

JET951

all manifolds and cam covers on 928 quad cams are magnesium. so are the ones that come on the 944 s and s2. the spider manifold from the early 928 are alumunium. i use a product called autosol. it polishes the aluminium and leaves a finish on there. i drive my car everyday and polishe the manifold every four months or so. this is my engine bay...

heinrich

DUDE that is SMOKING!!!!!!!

JET951

thanks heinrich. did all the work myself. then again i have an unfair advantage. i work as a porsche specialist in sydney, with my dad. i even made the strut brace.

Nicole

These engine letters are also available in a nice combination of red/black, or a cool chrome look - the latter is ideal for engine parts that have been powdercoated black or red.

JET951: Your engine looks awesome. But when I first saw the pictures, I was wondering where you are hiding the other half of it. Then I realized it wasn't a 928...

JET951

the other half went missing somewhere . im sure it was there when i took the engine out, it just wasnt there when we put it back in.

cobalt

Aluminum will keep the polished look for quite some time, so long as it has been properly cleaned after polishing or until it gets attacked by the elements. Wheels will oxidize quickly if not clear coated. Any wheel cleaner will dull polished aluminum. Blue Majic, Flitz and several other metal polishes will bring back the original luster with a little elbow grease.

Be careful when clear-coating aluminum. Make sure the clear-coat can handle the heat and environment. Most clear coats will either crack or yellow over time.

Magnesium will corrode very quickly. Although it will polish to a high luster, if not protected by either a chemical conversion (Sodium Dichromate) or clear-coated it will begin to turn a black color quickly, this is accelerated by oils from your hands. Water and magnesium do not mix well and prolonged storage in moist environments will eventually lead to the salts leaching out of the magnesium. This is usually characteristic of a white powdery substance. If it gets to this point the surface metal will be permanently damaged. Improper treatment of magnesium can lead to a condition, which can become explosive.

BTW looks great.

Koenig928

Wow, those turned out incredible looking! That's alot of work to get into all those angles, but this place has the right equipment for that.

These guys polished the Koenig rims in less than a day...

Beautiful job!

worf928

Or IOW, once the factory's coating flakes off your intake and/or cam covers you have a limited time window in which to deal with the bare mag alloy.

cobalt

For the most part true. Alloy composition plays a big roll. The three components in magnesium alloys that cause corrosion to escalate are Manganese, Copper & Iron. Keep these down to a minimum and the Mag alloy will handle corrosion better. I do not know what alloys the factory uses. I would recommend touching up any exposed surfaces quickly especially if the car is not garaged or driven daily in inclement weather.

I will see if i can post some pictures of magnesium that has been exposed to high humidity without protection tomorrow.