Mikesta
07-12-2025, 07:47 PM
The Toyota 4Y, 4YE, and 4YEC engines are all part of Toyota’s Y engine family, which is a series of inline-four, OHV (overhead valve), 8-valve engines typically used in commercial vehicles, vans, and industrial equipment (like forklifts). Here’s a breakdown of the key differences:
🔧 1. 4Y Engine
Type: Carbureted gasoline engine
Displacement: 2.2L (2237cc)
Fuel System: Carburetor
Use Case: Found in vehicles like the Toyota LiteAce, HiAce, TownAce, and forklifts
Compression Ratio: ~8.8:1 (varies slightly by market)
Power Output: ~70-90 hp depending on emissions tuning and carburetor type
⚡ 2. 4YE Engine
Type: Fuel-injected version of 4Y
Displacement: Same 2.2L (2237cc)
Fuel System: Electronic Fuel Injection (EFI)
Use Case: Vehicles with stricter emissions regulations or higher performance demands
Compression Ratio: Usually similar to 4Y, but tuned for EFI
Power Output: Slightly higher than the carbureted 4Y, better throttle response and fuel efficiency
Notable difference: The addition of EFI (Electronic Fuel Injection) makes it more reliable in varying conditions and slightly more fuel-efficient than the carbureted 4Y.
🌿 3. 4YEC Engine
Type: Fuel-injected, emissions-compliant version of the 4Y
Displacement: 2.2L (2237cc)
Fuel System: EFI with added emissions controls
“EC” Meaning: “Electronic Control” + “Catalytic” (or “Emissions Control”)
Use Case: Typically in U.S. domestic or California-emissions-compliant vehicles and industrial applications
Key Additions: Catalytic converters, EGR (exhaust gas recirculation), O2 sensors, ECU with emissions mapping
Power Output: Similar to 4YE, but may vary slightly based on emissions tuning
🔍 Summary Table
Engine
Fuel System
Emissions
Notes
4Y
Carbureted
Basic
Simple and rugged; older tech
4YE
EFI
Moderate
Better performance, EFI adds reliability
4YEC
EFI + Emissions
Strict
Emissions-compliant with ECU, O2 sensor, cat converter
🔧 Typical Applications
4Y: Older HiAce, TownAce vans, forklifts (Toyota 5-series, 6-series)
4YE: Later HiAce/TownAce vans, sometimes imported to North America
4YEC: Forklifts in the U.S., emissions-regulated industrial vehicles
Looks like they are using the same main block which can still be ordered from toyota. Can we just use the long block and add our components? Sure beats rebuilding and gets my van driving quicker.
https://www.ebay.com/itm/121530911672?_skw=4y+engine&itmmeta=01K00G847R8Y03P064FHDPAV3J&hash=item1c4bce8bb8:g:vsYAAOSwc3ZUoW~7&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1eP3r10C eeFNjmIpcwiVXMzwDgsmzc%2FInm4WMdTq0UeklgYhj08afeEP Nls90hd41lvmV2wom55P2DFWyIP1gc7qyAcQhvu5Jw0FygmRPt itFJq0U2YUkjZ0x9HjcqTdu1Ya%2FoZL5rps6J0DUddoQ6NSqU DlJXrF2m%2BYySk0O%2Fy67rYWFUYTQjKfycjuwkDq3AKszZCC 7Yyp0dw9BesZXCjF2Hes5DgtChE0VqAbdyUD0I6z8KV3CIhkih Ggizn6%2B2BdnH4nilEQ5O59phy%2BqtIg5kP8Jaw8e%2FnMY2 Qs0Xi2Q%3D%3D%7Ctkp%3ABk9SR4rEoJCAZg
🔧 1. 4Y Engine
Type: Carbureted gasoline engine
Displacement: 2.2L (2237cc)
Fuel System: Carburetor
Use Case: Found in vehicles like the Toyota LiteAce, HiAce, TownAce, and forklifts
Compression Ratio: ~8.8:1 (varies slightly by market)
Power Output: ~70-90 hp depending on emissions tuning and carburetor type
⚡ 2. 4YE Engine
Type: Fuel-injected version of 4Y
Displacement: Same 2.2L (2237cc)
Fuel System: Electronic Fuel Injection (EFI)
Use Case: Vehicles with stricter emissions regulations or higher performance demands
Compression Ratio: Usually similar to 4Y, but tuned for EFI
Power Output: Slightly higher than the carbureted 4Y, better throttle response and fuel efficiency
Notable difference: The addition of EFI (Electronic Fuel Injection) makes it more reliable in varying conditions and slightly more fuel-efficient than the carbureted 4Y.
🌿 3. 4YEC Engine
Type: Fuel-injected, emissions-compliant version of the 4Y
Displacement: 2.2L (2237cc)
Fuel System: EFI with added emissions controls
“EC” Meaning: “Electronic Control” + “Catalytic” (or “Emissions Control”)
Use Case: Typically in U.S. domestic or California-emissions-compliant vehicles and industrial applications
Key Additions: Catalytic converters, EGR (exhaust gas recirculation), O2 sensors, ECU with emissions mapping
Power Output: Similar to 4YE, but may vary slightly based on emissions tuning
🔍 Summary Table
Engine
Fuel System
Emissions
Notes
4Y
Carbureted
Basic
Simple and rugged; older tech
4YE
EFI
Moderate
Better performance, EFI adds reliability
4YEC
EFI + Emissions
Strict
Emissions-compliant with ECU, O2 sensor, cat converter
🔧 Typical Applications
4Y: Older HiAce, TownAce vans, forklifts (Toyota 5-series, 6-series)
4YE: Later HiAce/TownAce vans, sometimes imported to North America
4YEC: Forklifts in the U.S., emissions-regulated industrial vehicles
Looks like they are using the same main block which can still be ordered from toyota. Can we just use the long block and add our components? Sure beats rebuilding and gets my van driving quicker.
https://www.ebay.com/itm/121530911672?_skw=4y+engine&itmmeta=01K00G847R8Y03P064FHDPAV3J&hash=item1c4bce8bb8:g:vsYAAOSwc3ZUoW~7&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1eP3r10C eeFNjmIpcwiVXMzwDgsmzc%2FInm4WMdTq0UeklgYhj08afeEP Nls90hd41lvmV2wom55P2DFWyIP1gc7qyAcQhvu5Jw0FygmRPt itFJq0U2YUkjZ0x9HjcqTdu1Ya%2FoZL5rps6J0DUddoQ6NSqU DlJXrF2m%2BYySk0O%2Fy67rYWFUYTQjKfycjuwkDq3AKszZCC 7Yyp0dw9BesZXCjF2Hes5DgtChE0VqAbdyUD0I6z8KV3CIhkih Ggizn6%2B2BdnH4nilEQ5O59phy%2BqtIg5kP8Jaw8e%2FnMY2 Qs0Xi2Q%3D%3D%7Ctkp%3ABk9SR4rEoJCAZg