Hino J08E 7.7L Turbo Actuator 2010-2019: OEM 790598-0012
HINO J08E 7.7L TURBO ACTUATOR 2010-2019: OEM 790598-0012
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New, Tamerx Turbo Actuator, Tamerx part number 830725-5001TX ( OEM Part Number 790598-0012 ).This part is primarily made for a Hino J08E 7.7L, production years 2010-2019, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: 12 Volt
OEM NUMBERS
| Primary OEM | 790598-0012 |
| Additional OEM | 17201-E0734, 790598-0012 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | 00840490535565 |
| WEIGHT | 1.00 LBS |
SHIPPING OPTIONS
Ship Weight : 1.00 LBS
UPS Ground, 2nd Day Air, Next Day Air
SHIPPING POLICY
Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.
The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.
Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.
Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".
If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.
As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.
What is a Core Charge?
A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.
30 Day Core Charge Hold
You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.
"This Product Doesn't Have a Core"
Installed on Hino J08E 7.7L engines from model years 2010–2019, OEM 790598-0012 is a turbo actuator engineered to regulate the turbocharger’s variable mechanism for precise airflow control. This component is manufactured to OEM specifications to ensure accurate fitment and compatibility with factory turbo system assemblies. Constructed from durable materials, it is built to withstand the operating conditions common in medium- and heavy-duty diesel applications. The actuator supports consistent turbo response by adjusting airflow dynamics during normal engine operation. It is a dependable choice for fleet maintenance and targeted repair needs requiring reliable turbo system functionality.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2010 | Hino | J08E 7.7L | ||||
| 2011 | Hino | J08E 7.7L | ||||
| 2012 | Hino | J08E 7.7L | ||||
| 2013 | Hino | J08E 7.7L | ||||
| 2014 | Hino | J08E 7.7L | ||||
| 2015 | Hino | J08E 7.7L | ||||
| 2016 | Hino | J08E 7.7L | ||||
| 2017 | Hino | J08E 7.7L | ||||
| 2018 | Hino | J08E 7.7L | ||||
| 2019 | Hino | J08E 7.7L | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Hino J08E 7.7L Turbo Actuator 2010–2019: OEM 790598-0012 is important because it directly controls how the turbocharger responds to engine demand. Without a properly functioning actuator, the turbo system cannot regulate airflow accurately, which can affect engine efficiency, drivability, and emissions compliance.
This actuator manages the position of the turbocharger’s variable vanes. By adjusting vane angles, it controls exhaust flow across the turbine and determines how much compressed air enters the engine. Precise airflow management is essential for maintaining balanced combustion under varying loads and speeds.
When the turbo actuator operates correctly, it helps ensure:
- Consistent engine response during acceleration
- Stable airflow under heavy load conditions
- Proper coordination with the engine control module
- Reduced risk of turbo-related fault codes or derates
Because the turbo system plays a major role in engine operation, any malfunction in the actuator can lead to reduced efficiency, warning lights, or limited engine output. OEM 790598-0012 is engineered specifically for 2010–2019 Hino J08E 7.7L engines, ensuring accurate fitment and reliable communication with the engine’s electronic controls.
For fleets and operators, maintaining a reliable turbo actuator helps protect engine reliability, minimize downtime, and ensure the turbocharger performs as intended throughout the vehicle’s service life.
A bad turbo actuator can cause noticeable boost control issues, reduced engine performance, and emissions-related fault codes. The actuator controls the position of the turbo’s variable geometry vanes (VGT) or wastegate, and when it fails, the engine cannot properly regulate boost pressure.
One of the earliest signs is an illuminated check engine light with boost-related diagnostic trouble codes. Drivers often experience sluggish acceleration, lack of power under load, or inconsistent throttle response. In some cases, the engine may enter limp mode to protect against overboost or underboost conditions.
Midway through diagnosis, the most common signs of a failing turbo actuator include:
- Underboost or overboost fault codes
- Engine derate or limp mode activation
- Poor acceleration or reduced power
- Erratic or unstable boost pressure readings
- Failed actuator calibration or sweep test
- Clicking noises or no movement during key-on actuator test
In more advanced cases, the actuator may stick in one position, causing excessive exhaust backpressure or uncontrolled boost levels. Electrical issues, internal motor failure, wiring corrosion, or soot buildup in the VGT mechanism are common causes.
Before replacing the actuator, verify wiring integrity, perform calibration procedures, and inspect the turbo for mechanical vane sticking. Early diagnosis helps prevent turbo damage and costly repairs.
Yes, it communicates with the engine’s sensor network and control system for precise turbo positioning feedback.
Medium- and heavy-duty trucks equipped with Hino J08E 7.7L engines from 2010–2019 use this actuator.
Yes, a diagnostic scan or calibration is typically recommended after installation to verify proper communication with engine controls.
Yes, professional installation is advised to ensure correct connection to the turbo and engine control systems.
Hino Turbo Actuators
