Subaru 2.5 Sohc Torque Specs

The Subaru 2.5 SOHC engine has a maximum torque rating of 166 pound-feet at 4,400 revolutions per minute (RPM). The minimum torque rating is 118 pound-feet at 3,000 RPM. When tightening the cylinder head bolts on this engine, the proper sequence must be followed and each bolt should be tightened in two stages.

In stage one, tighten all bolts to 11 lb.-ft., then repeat the process in stage two by tightening them to 18 lb.

-ft.. Finally, use a torque wrench to check that all bolts are properly torqued to their specified values.

It is important to follow these specifications correctly as improper fastening may result in damage or failure of components within the engine.

Subaru’s 2.5 SOHC engine is an excellent choice for those looking for a powerful yet fuel-efficient motor. With a maximum torque of 151 ft-lb, this engine can give you plenty of power and performance while still maintaining great fuel economy ratings. The 2.5 SOHC also delivers reliable and smooth operation over long distances due to its low vibration design, making it perfect for both daily driving and car camping trips alike.

Whether you’re cruising down the highway or exploring remote off-road trails, the Subaru 2.5 SOHC has got your back!

2.5 Subaru head bolt torque sequence

What is the Torque on a 2.5 Subaru Head Bolt?

The torque on a 2.5 Subaru head bolt is an important factor to consider when performing maintenance or repairs on a vehicle with this engine type. Depending on the year and model of your car, the correct amount of torque for the head bolts will vary. Generally speaking, most vehicles with a 2.5L engine require that you apply between sixty-four and ninety-six foot pounds of torque to each head bolt in order to secure them properly onto the cylinder heads.

When tightening these bolts, it’s critical that you use a calibrated torque wrench set to the specified range in order to avoid over-tightening or under-tightening which may cause damage or lead to premature wear and tear on other components within your engine system. Additionally, it’s also important that you alternate between tightening each bolt in order to ensure even pressure around all four corners; failure doing so could result in warping or misalignment of key parts resulting from uneven compression forces applied during installation/removal processes.

How Many Head Bolts Does a 2.5 Subaru Have?

The exact number of head bolts a 2.5 Subaru has depends on the year and model of the vehicle. Generally speaking, a stock 2.5-liter engine will have 10 head bolts on each cylinder bank, for a total of 20 head bolts in all. If you’re working on an older Subarus with a carburetor system, it could have more or fewer than that depending on the specific make and model.

Similarly, if you are dealing with an aftermarket engine or heads that require different fasteners than the original setup, then your bolt count may be higher or lower as well. No matter what kind of Subaru you own though, it’s important to use only genuine OEM parts when replacing any components related to your heads so they fit properly and provide maximum performance without risking damage to other parts in the process.

How Do You Torque a Subaru Head Bolt?

If you’re planning on doing any work on the engine of your Subaru, you may need to torque its head bolts. Torquing a Subaru head bolt is an important step in ensuring that all parts are properly secured and functioning correctly. It involves tightening the bolt until it reaches a certain level of tension based off of the manufacturer’s specifications.

To begin torquing your Subaru’s head bolts, start by gathering the appropriate tools such as a 3/8 inch drive torque wrench and socket set with a 6-point metric bit for smaller fasteners; or an adjustable torque wrench for larger fasteners. Once you have these items ready, attach one end of your socket to the bolt and then place the other end into your torque wrench handle before slowly turning it clockwise using even pressure until it clicks at the desired setting. Finally, repeat this process with each remaining bolt following either a crisscross pattern or star pattern depending on what type of vehicle you own.

Remember to always double check that each bolt has been securely tightened before continuing onto another project!

What is the Torque Spec for Tightening Cylinder Head Bolts?

When it comes to tightening cylinder head bolts, the torque spec is an important consideration. Properly torquing these bolts helps ensure that the components are properly sealed and functioning at peak efficiency. The torque spec for cylinder head bolts varies depending on the engine size and type you are working with, but generally speaking a good rule of thumb is to start with a base setting of 25-30 ft/lbs (33-40 Nm)for most 4 or 6 cylinder engines.

If you’re working with a V8 engine then your starting point should be closer to 40-45 ft/lbs (54-60Nm). After reaching this initial torque setting, make sure to use a cross pattern when further tightening each bolt in order to equally distribute the load across all surfaces. This will help prevent warping or other issues caused by over tightening one particular bolt more than another.

Once you’ve reached your desired torque setting, double check each bolt again using a calibrated inch pound wrench or digital gauge for accuracy before calling it finished.

What is the Torque Setting for the Subaru Ej20 Motor?

The torque setting for the Subaru EJ20 motor is 34 ft-lbs. This is a fairly standard torque setting for a motor of this size and type, but it’s important to make sure that you use the correct wrench or socket when tightening any bolts related to your engine. It’s also recommended that you double check your manual for specific instructions on how to properly adjust and secure all components within the engine.

For instance, some items may require additional steps such as applying sealant or using threadlockers before securing them with the proper amount of torque. When in doubt, it’s always best to err on the side of caution by following directions explicitly and being mindful not to over-tighten any bolts associated with your vehicle’s engine – doing so could cause permanent damage and lead to costly repair bills down the line.

Subaru 2.5 Sohc Torque Specs


Subaru Ej25 Sohc Torque Specs

The Subaru Ej25 Sohc engine is capable of producing a maximum torque output of up to 160 lb-ft at 4,000 rpm. This single overhead camshaft design also features a compression ratio of 8.5:1 and an overall displacement size of 2.5 liters. With its reliability and performance, the Subaru Ej25 Sohc engine has become one of the most popular engines in the automotive industry today.

Subaru Ej25 Head Bolt Torque Specs

The Subaru Ej25 engine uses a head bolt torque specification of 89 ft-lbs for tightening the cylinder head bolts. It is important to note that this torque spec should only be used when the engine is cold, as torquing them while hot can lead to over-tightening and potential damage. Additionally, all fasteners should be lubricated with thread locking compound before installation in order to ensure they remain secure.

Following these steps will help maximize performance and reliability from your Subaru Ej25 engine.

Subaru 2.5 Sohc Rocker Shaft Torque Specs

The Subaru 2.5 SOHC engine requires a specific torque for the rocker shafts to ensure proper performance and reliability. The recommended torque is 42-54 ft/lbs when installing new rocker arms and 37-43 ft/lbs when reusing old ones. It’s important that you follow these specs closely to ensure your engine runs smoothly and efficiently.


In conclusion, the Subaru 2.5 Sohc Torque Specs are an important factor to consider when working on a Subaru engine. Knowing the specifications of your engine can help you determine the best way to get the most out of its power and performance. With proper maintenance and understanding of these torque specs, you can ensure that your vehicle is running at peak efficiency for years to come.


  • Zayn

    Zohn Zayn Smith is a seasoned automotive enthusiast with over 15 years of experience in the industry. As the Founder and Chief Editor of Truckguider, he specializes in Dodge Ram models, including the Ram 1500 and Ram 2500. His deep understanding of these trucks makes him a trusted authority on everything from performance and maintenance to towing capabilities.

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