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Chrysler 300 Engine Oil Cooler Coolant Pipes

Chrysler 300 Engine oil cooler coolant pipes

Starting at low prices, AutoBuffy stocks multiple engine oil cooler coolant pipes from top OE-quality brands. This pipe carries engine coolant through the oil cooler to regulate oil temperature. When it cracks or corrodes, coolant leaks internally or externally, risking oil contamination, overheating, and accelerated engine wear on your Chrysler 300.

Signs your Chrysler 300 needs a new engine oil cooler coolant pipe

  • Milky or frothy oil on the dipstick or under the oil cap, indicating coolant has mixed with engine oil
  • Unexplained coolant loss with no visible external puddle under the vehicle
  • Oily residue or sheen visible in the coolant reservoir or radiator overflow tank
  • Engine temperature gauge climbing higher than normal, especially at idle or in slow traffic
  • White or sweet-smelling exhaust that is not related to a head gasket or intake manifold
  • Low oil pressure warning light triggered by oil thinned and diluted by coolant intrusion

Which engine oil cooler coolant pipe should you buy for your Chrysler 300?

The main decision is whether to match the OE material and routing exactly or upgrade to a more corrosion-resistant option. Fit is critical on this pipe because slight dimensional differences can prevent proper seating at the cooler and block connections. Always confirm the pipe position — feed or return — before ordering, as many vehicles use two separate pipes.

OE-replacement steel pipe
Best for
Restoring exact factory fit and routing
What you get
Direct-fit stamped or formed steel pipe matching original dimensions, gaskets, and O-ring seats
OE-replacement aluminum pipe
Best for
Vehicles originally equipped with aluminum lines
What you get
Lightweight, corrosion-resistant aluminum construction with factory-spec fittings and end connections
Upgraded stainless steel pipe
Best for
High-mileage engines or vehicles in rust-prone climates
What you get
Enhanced corrosion resistance over factory steel, same routing, longer service life in harsh conditions
Complete pipe and O-ring kit
Best for
Anyone doing a full repair rather than just the pipe
What you get
Pipe plus all associated O-rings, seals, and sometimes clamps so no separate hardware sourcing is needed

Replacing the engine oil cooler coolant pipe on a Chrysler 300

Moderate⏱ 1–2 hoursSocket and ratchet setLine wrench or flare-nut wrench setDrain pan and coolant catch containerPick tool for O-ring removalTorque wrench

Begin by draining the cooling system to a level below the oil cooler connections, then disconnect the pipe at both the cooler fitting and the engine block or coolant passage, noting the O-ring or gasket locations at each end. Install the new pipe with fresh O-rings lightly lubricated with clean coolant, and snug all fittings to spec — over-tightening aluminum fittings in particular can crack the cooler housing. Refill and bleed the cooling system, perform an oil and filter change, then run the engine to operating temperature and check all connections for leaks before returning the Chrysler 300 to normal use.

Frequently asked questions

How much does it cost to replace engine oil cooler coolant pipes on a Chrysler 300?
Parts start at low prices at AutoBuffy. Total cost depends on whether one or both pipes need replacement and local labor rates. Because coolant-oil contamination requires an oil flush and coolant flush as well, factor those service costs in when budgeting the full repair on your Chrysler 300.
Can I drive my Chrysler 300 with a leaking engine oil cooler coolant pipe?
No. Even a slow leak allows coolant to enter the oil, stripping its lubricating properties. Within a short period this causes accelerated bearing wear and can lead to catastrophic engine damage. Stop driving the Chrysler 300 as soon as coolant-oil mixing is suspected and repair the pipe before restarting the engine.
How do I know if the feed pipe or the return pipe is leaking on my Chrysler 300?
The feed pipe carries pressurized coolant into the oil cooler, so it tends to show more obvious external weeping or dripping at its fittings. The return pipe operates at lower pressure and leaks are often internal rather than external. Pressure-testing the cooling system while inspecting both pipes is the most reliable diagnostic method.
Do I need to flush the oil and coolant after replacing the engine oil cooler coolant pipe on my Chrysler 300?
Yes, always. If the pipe failed long enough to allow any fluid cross-contamination, both the engine oil and the coolant are compromised. Running contaminated oil causes bearing and journal damage. Drain and refill the oil with a fresh filter, and flush and refill the cooling system completely before returning the Chrysler 300 to service.
What causes engine oil cooler coolant pipes to fail?
The most common causes are corrosion from aging coolant that has lost its inhibitor package, physical cracking from repeated heat cycling over many years, and O-ring or seal degradation at the connection points. On the Chrysler 300, road salt accelerates external corrosion on steel pipes. Maintaining fresh coolant on schedule significantly extends pipe life.
Are engine oil cooler coolant pipes vehicle-specific, or will any pipe fit my Chrysler 300?
They are highly vehicle-specific. Pipe diameter, length, bend routing, end-fitting type, and O-ring groove dimensions vary by engine and model year. An improperly fitting pipe will not seal correctly at the cooler or block connections. Always use your Chrysler 300's exact year and engine code to select a verified-fit pipe from AutoBuffy's multiple options.

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Engine oil cooler coolant pipes for other Chrysler models

Chrysler Town CountryChrysler 200