Surface rust

[Cheekster96]

Hey all...first oil change on Big Red today (1100 miles) and wanted to snap a couple of photos of the underneath. Just two photos of the front axle. You can also see how the frame-coated wax was dripping off of the frame.

8.5 quarts Mobil 1 5W-30 and an AC Delco PF63 oil filter for the oil change.

Happy Father's Day weekend to all the dads out there.

Lee

 

Well I guess photos too big...so only one here.

[Another JR]

The frame coating condition and the surface rust on those drive train components is normal. In my experience 8.5 quarts in the L8T engine could be a slight overfill. Mine takes exactly 8 quarts to be at the full mark with oil and filter change after letting it drain to very slow drips. 

[Cheekster96]

Eight quarts was a bit low on the dipstick after running for several minutes. I install the oil filter empty so their is my .5 quart.

My truck was built mid November and sat at the Flint parking field since mid May.

Not very concerned with the rust.

Still LOVING this truck. 

[newdude]

Normal.  I can't get the picture to post, but they have a picture in this of a front axle that looks exactly like yours.  

#PI0281I: Underbody Component Corrosion - (Apr 7, 2022)

The following information may be helpful when addressing underbody component corrosion with customers.

Some customers may comment that one or more of their vehicle's underbody components are showing some form of corrosion.

This corrosion may be red in appearance (rust) if the component is steel, forged iron or cast iron.

This corrosion may also be grey or white in color if the component is constructed of an aluminum alloy.

General Motors uses a large variety of materials in the manufacture of vehicles. Many of these components undergo an extensive corrosion protection process. These components include major body structures, powertrain, wiring and electrical components and various other areas of the vehicle. General Motors engineering determines the effects of corrosion on every vehicle component.

Acceptable Corrosion

General Motors has determined that the performance of some components is not affected by surface corrosion and no longer takes preventative steps on these parts.

 

Rust

This corrosion may be red or brown in appearance if the component is made of steel, forged iron or cast iron.

These are typical underbody or mechanical components such as but not limited to propshafts, propshaft yokes, U-joint, steering knuckles, brake rotors and calipers, axle housings, springs, shock absorbers, suspension control arms, tie rod ends and exhaust system components. As the rust ages, it turns from an orange-red like appearance to a darker brown like appearance.

 

Aluminum Oxidation

Cast aluminum alloy components may appear to have a grey or white coating on the surface commonly known as “surface oxidation.” Uncoated aluminum alloys begin to oxidize as soon as it is exposed to the atmosphere. This coating does not affect the serviceability or performance of the component.

 

Many mechanical components are cast in aluminum alloys, these components may include, but are not limited to oil pans, valve covers, transmission and transfer case housings, steering gears and axle housings.

Edited June 20, 2022 by newdude