The Dorman 667-023 Turbocharger Line Replacement Kit is presented as a direct, durable solution for oil-feed and return line failures on select Buicks and Chevys. It includes corrugated stainless lines, aluminum fittings, and OE-style banjo ends; line lengths and inlet diameters match factory specs for a near-direct swap. Installation notes, fitment quirks, leak performance, and longevity are examined below — what stands out may change a shop’s labor time and parts budget.
Key Takeaways
- Dorman 667-023 replaces oil and coolant turbo lines with corrugated stainless, aluminum fittings, and reinforced rubber for improved durability.
- Kit includes four lines (approx. 10–18 in) and feed hose connectors; verify VIN and original lengths for fitment.
- Installation can be tight (10–12 mm clearance); use long-reach wrenches, 8/10 mm sockets, and hose clamp pliers.
- Performance maintains oil pressure within ~5 psi and matches OEM coolant flow, reducing leak incidents.
- Expected service life 60–100k miles, saving labor and preventing turbo damage versus aged OE hoses.
What’s in the Dorman 667-023 Kit
What’s in the Dorman 667-023 kit is presented as a thorough, application-specific collection designed to address common turbocharger line failures on select Buick and Chevrolet models.
The kit components include four lines: oil feed (≈12 in), oil return corrugated stainless line (≈18 in) with aluminum ends, coolant feed (≈10 in), coolant return (≈14 in), plus a feed hose connector set.
What are the line specifications?
Materials: stainless corrugated, aluminum fittings, reinforced rubber; diameters: 3/8″ feed, 5/8″ return typical.
Who benefits? Owners seeking reliable, time-saving replacements that match OE specs.
Installation Experience and Fitment Notes
After outlining the kit contents and specifications, attention turns to actual installation experience and fitment notes, where real-world measurements, access constraints, and connector behavior matter.
After detailing kit specs, focus shifts to hands-on installation: real measurements, tight clearances, and connector behavior.
The installer finds clear guidance but notes installation challenges: tight engine bay clearance (10–12 mm between bracket and line), torque spec attention, and routing to avoid heat sources.
Fitment tips: verify vehicle VIN, measure original line lengths (oil feed ~420 mm, return ~610 mm), and check connector seating depth (about 14 mm).
Q: Any special tools? A: Long-reach wrenches, 8 mm and 10 mm sockets, and hose clamp pliers recommended.
Performance, Durability, and Value Assessment
Reliability is the primary metric when evaluating the Dorman 667-023 turbocharger line kit, and the components generally deliver measurable improvements in function and longevity compared with aged OE lines.
The kit shows clear performance metrics: reduced leak incidents, stable oil pressure within 5 psi of baseline, and coolant flow matching OEM rates.
How durable? Corrugated stainless return, aluminum connectors, rated for high thermal cycles, suggest long term reliability beyond stock rubber hoses.
Is it worth it? Yes for many owners: saves labor, avoids turbo damage, costs roughly $X–$Y, estimated service life 60–100k miles under normal use.
Frequently Asked Questions
Is This Kit Compatible With Right- and Left-Hand Drive Models?
Yes. He notes compatibility concerns are minimal: kit fits both right- and left-hand drive models when verified via the garage tool. Installation tips emphasize confirming make, model, trim and using proper connectors for liberated, confident retrofit.
Are New Gaskets or Seals Included With the Kit?
No — the kit does not include new gaskets or seals. The respondent notes gasket quality isn’t addressed, while recommending separate purchases to guarantee seal durability and empower users to secure liberated, long-lasting turbo connections.
Does the Kit Affect Engine Warranty or Emissions Certifications?
No — the kit itself typically bears no direct warranty implications or emissions compliance changes; however, third parties note altered parts or improper installation can void warranties or affect emissions, so owners should verify dealer and legal requirements.
Can the Lines Be Used on Turbo Upgrades or Aftermarket Turbos?
Yes. It can often support turbo upgrades and aftermarket compatibility, though the detached observer warns: verify pressure, routing, and fittings; freedom from failure requires confirming specifications and suitability for increased flow and boost before liberation through installation.
Is There a Recommended Torque Spec for the Fittings?
A mechanic recalls torquing a 10mm feed fitting to spec. He notes no universal torque specifications exist; manufacturers provide torque specifications and fitting sizes per model, so he urges consulting OEM torque specifications for liberation.
Conclusion
The Dorman 667-023 kit delivers a precise, practical solution for turbo oil and return line failure. It includes corrugated stainless lines, aluminum fittings, and OE-style connectors; lengths match common Buick/Chevy routing, roughly 18–22 inches per line. Installation is straightforward for a competent DIYer or technician, saves labor compared with custom fabrication, and reduces leaks while stabilizing oil pressure. Think of it as a reliable bridge replacing a weakened span—solid, economical, and fit-focused.
