The Chrysler 3.5L EGH is a 3,518 cc, 60 — degree V6 petrol engine produced between 1998 and 2003. It features an aluminum block and heads, single overhead camshafts (SOHC) per bank, and 24 valves. This iteration delivered 200–253 hp, utilizing sequential multi — port fuel injection for optimal power and smoothness.
Fitted to models such as the Chrysler 300M, Concorde, LHS, and Dodge Intrepid, the EGH was engineered for refined, powerful performance and quiet operation in C…
Production years 1998–2003 meet US Federal Tier 1 emissions standards (EPA Certification #AID-98-01).
The Chrysler 3.5L EGH is a 3,518 cc V6 petrol engine engineered for full-size sedans (1998-2003). It combines SOHC 24-valve architecture with sequential multi-port fuel injection to deliver smooth, linear power. Designed to meet US Federal Tier 1 emissions standards, it prioritizes refinement and adequate power for highway cruising.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,518 cc | |
Fuel type | Petrol | |
Configuration | 60° V6, SOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 96.0 mm × 81.0 mm | |
Power output | 200–253 hp (149–189 kW) @ 6,400 rpm | |
Torque | 221–255 lb-ft (300–346 Nm) @ 3,950 rpm | |
Fuel system | Sequential multi-port fuel injection (SFI) | |
Emissions standard | US Federal Tier 1 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | Unavailable |
The Chrysler 3.5L EGH was used across Chrysler's LH platform with longitudinal mounting. This engine received minor platform-specific adaptations for hood clearance and accessory mounting. All applications are documented in OEM service manuals.
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The EGH's primary reliability risk is internal water pump failure, with elevated incidence as mileage increases. Chrysler TSB 07-15-99 documents this as a known concern, while owner reports frequently cite coolant contamination in oil as a precursor to engine failure. Neglecting the timing belt service interval accelerates pump wear, making proactive replacement critical.
Analysis derived from Chrysler technical bulletins (1998-2003) and owner-reported failure data (1998-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 3.5L EGH can be reliable long-term if critical maintenance, especially the 60,000-mile timing belt and water pump replacement, is performed. Addressing the known water pump issue proactively is key. With proper care using the correct oil, these engines can exceed 200,000 miles.
The most common documented problems are internal water pump failure (TSB 07-15-99), timing belt failure if neglected, oil sludge from infrequent changes, and intake manifold gasket leaks. The water pump is the primary differentiator from other Chrysler V6s.
The 3.5L EGH SOHC V6 engine was used in the Chrysler 300M (1999-2003), Chrysler Concorde (1998-2003), Chrysler LHS (1999-2001), and Dodge Intrepid (1998-2003). It was the standard or optional engine in higher trim levels of these LH-platform sedans.
Minor power gains are possible with a cold air intake and exhaust, but the EGH has limited tuning potential. The ECU is not easily remappable, and the naturally aspirated SOHC design offers little headroom. Significant power increases are not practical without forced induction or internal modifications.
Fuel economy is moderate for a V6 of its era. Expect approximately 17 mpg city and 26 mpg highway in a typical 300M or Intrepid. Real-world combined figures usually range between 20-22 mpg, heavily influenced by driving style and vehicle condition.
Yes. The Chrysler 3.5L EGH is an interference engine. If the timing belt breaks or jumps time, the pistons will collide with the open valves, causing severe and expensive internal engine damage. Timely belt replacement is non-negotiable.
Chrysler specifies API SH (or higher) 5W-30 motor oil for the 3.5L EGH engine. Using the correct viscosity and quality oil is crucial to prevent sludge buildup and ensure proper lubrication, especially given the engine's design and known issues.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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