ACDelco Turbocharger Oil Line O-Ring

ACDelco Turbocharger Oil Line O-Rings

A turbocharger spins at extremely high speeds and depends on a steady supply of pressurized oil to lubricate and cool its bearings. The small rubber seals at the oil feed connections keep that oil where it belongs. When one hardens, flattens or cracks, the result can be seepage around the turbo, smoke from hot oil, falling oil pressure, or in the worst case a starved turbo bearing. ACDelco turbocharger oil line O-rings are designed to restore that seal on the oil lines that feed the turbo.

Why ACDelco Is a Logical Choice for Turbo Seals

ACDelco is General Motors' own parts brand. It is owned by General Motors and also offers aftermarket parts for non-GM vehicles. That GM connection matters for a part like this, because turbo oil line seals are highly application-specific. Diameter, cross-section and groove fit differ from one engine to the next, and a seal that is only close can leak under heat and pressure. Parts from a brand tied directly to GM's engineering are a sensible starting point for turbocharged GM applications.

ACDelco sorts its range into tiers. The portfolio is divided into GM Genuine Parts or ACDelco Original Equipment, ACDelco Gold, and ACDelco Silver. Some seals in this category have also been sold under the GM Genuine Parts name, and some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment. If you are cross-referencing part numbers, keep that overlap in mind.

Sizes and Construction

ACDelco's turbocharger oil line O-rings are not a single universal part. The range covers a spread of dimensions to suit different turbo plumbing. Listed examples include:

• Part 12575552, a black rubber ring with an 18mm inside diameter and 27mm outside diameter.
• Part 12612816, a rubber ring with a 13mm inside diameter and 19mm outside diameter.
• Part 25200945, a compact black rubber ring with a 4.89 mm inside diameter and 10.59 mm outside diameter.

This range of sizes is why it pays to match by vehicle fitment or original part number rather than by eye. Even a fraction of a millimeter in cross-section can change how well an O-ring compresses in its groove.

Warranty and Shopping Considerations

Listings for these O-rings show a 1 Year Limited Warranty. When replacing a turbo oil line seal, a few habits help the repair last:

• Replace the O-ring any time an oil feed line or fitting is disconnected, since old rubber takes a compression set and rarely reseals well.
• Confirm the part number against your engine and turbo configuration before ordering.
• Inspect the mating surfaces and fittings for scoring or residue, and lightly lubricate the new seal with clean engine oil during installation.
• Check related items at the same time, such as the oil feed line itself or the turbo oil line gaskets, which ACDelco also supplies for some applications.

Explore More

To see everything the manufacturer offers, visit the ACDelco brand page. For a broader look at how these seals fit into turbo maintenance, including other makes and sizes, browse the full Turbocharger Oil Line O-Ring category.