This article will tell you all you need to know about the LS oil pan torque sequence, why it is important, and answer some key questions about it.
If you are an experienced driver, you must know the torque sequence of your vehicle by heart and can turn the bolts in your sleep.
But for those who are new to this, let us help you out. Knowing the torque sequence of your vehicle becomes important when you are dealing with the engine and have to make a few changes by yourself.
In this article, we will talk about the LS Oil Pan Torque Sequence and how you should go about the whole process.
What Is A Torque Sequence?
The oil pan of an engine is a component at the bottom of a vehicle’s engine that is held in place by bolts and works as a reservoir for the engine’s oil before getting pumped. The term LS oil pan is used to define the shape of the oil pan and is a common design in many modern cars.
So a torque sequence is nothing but the order in which the crankcase needs to be torqued for a particular engine type. The bolts of the oil pan are tightened by hand and set in place by a special wrench. The process of torque is used to screw the cylinder head bolts down in their place, often with a specific measurement according to the vehicle.
With a wrench, the torque sequence of the pan is used to tighten the crankcase, making sure that the nuts and bolts are screwed in a specific manner. This is to be done in a sequence to avoid overtightening, which could cause damage to the engine threads when the car is fired up.
Why Is Torque Sequence Important?
When you are turning in the torque sequence, you are actually tightening the screws of the crankcase just below your engine. If it is loose than what it should be, it could result in oil leakage. If it’s too tight, it directly puts pressure on the engine thread, sometimes damaging all the bolt threads.
Car manufacturers and professional mechanics suggest that torque sequences are needed to reduce the pre-load. When you can turn the torque sequence properly in the LS oil pan, it ensures that your bolt is just the right amount tight in the engine, with no loss in the load that is needed to maintain the good condition of the engine.
Now that you have a basic idea about what the torque sequence is let us tell you how to go about the process.
What Do You Do For The LS Oil Pan Torque Sequence?
There are a number of different LS engines, so the torque sequence for oil pans will depend on the model of the vehicle you are using. So before getting started, make sure that you have the torque specs right, which will save you unnecessary costs in the end.
Here, let us walk you through the oil pan torque sequence of a Chevy:
- Tighten the drain plug in the crankcase
- You need to use your hand to guide the bolt and tighten it as required in the specs
- The next step is to reach out and start torquing the adaptor holding the oil filter in place. When you touch the crankcase, torque it to either a three-quarter or a full turn
- Finally, tighten the oil gallery to the crankcase.
Most vehicles work on the same principle as these oil pans. The next thing you need to make sure of is the specs you are going to use on the vehicle. Though the main idea remains the same, choosing the right specs and following the right sequence is extremely important to keep your engine healthy and functioning.
Torque Sequence For LS2
For LS2 models, make sure you are tightening the crankcase after confirming that all the transmission bolts and drain plugs are secured.
Here are the steps you can follow for an LS2 Oil pan:
- Use a 14mm torque wrench to torque down the chamber bolts. Make sure to secure the bolt into the base of the crankcase by hand.
- Tighten the chamber bolt by hand till you can feel that they are in place. Start torquing it by turns with the wrench.
- While torquing, make sure that all the bolts are in a single line adjacent to each other.
Torque Sequence For LS3
For loosening an LS3 Oil Pan crankcase, use the wrench between 14-16 Nm. while tightening, change the wrench to 16-18 Nm. You have to follow a criss-cross pattern when you are working with LS3 bolts.
An LS3 engine uses gaskets, so the torque sequence becomes more crucial if you are trying to avoid oil leaks. You have to make sure that you are not overtightening the threads to avoid any kind of tear in the engine threads.
Torque Sequence for 5.3
The 5.3 Oil Pan Torque Sequence can be done as follows:
- Tighten the bolts by hand once you guide them properly, and start by torquing the opposite center bolts
- Start on one side, torque the bolts that are facing each other and then move to the next side.
- The sequence has to be followed for all the bolts and then retightened in order
The front covers of the engine are 18 ft lbs, and the rear cover bolts are 106 lbs. The other components should be torqued down to 37 ft-lbs. This includes bell housing, a converter, and gearbox covers.
Torque Sequence for 6.0 LS Oil Pan
For this, you need to first confirm that you have a 6.0 LS engine. When you are trying to replace the oil pan crankcase, you will have to follow these steps:
- Park your vehicle on a soil pavement, on level ground
- Open the drain plug and unbolt the crankcase
- Torque the bolts by hand till you feel them tighten
- Torque the 11mm bolts to 13Nm, using a criss-cross pattern
Chevy LS 5.7 Torque Sequence
If you own a Chevy 5.7LS engine, you have to follow the sequence given below:
- Tighten all the bolts by hand
- Tighten the 15mm bolts to 11Nm
- Tighten the 16mm bolts to 15Nm
- In the final step, secure the 18mm bolts to 20Nm
Frequently Asked Questions
What is the torque spec on the oil pan bolts?
There are different torque specs on oil pan bolts that depend on the car manufacturer. The idea is to stick to the manufacturer’s specifications to avoid any kind of damage to the engine.
What is a torque sequence?
Torque is referred to the depth that a bolt can go into. Torque sequence is used to signify the manner and sequence in which the bolts need to be tightened. The torque sequence will include the pattern as well as the depth of the bolts that you will have to tighten.
What is the torque for the oil pan gasket?
Duraplastic oil pan gaskets have torque bolt range from 20-25 Nm. The range of thermoplastic or aluminum gaskets will be between 30-35 Nm.
What are the torque specs on an LS engine?
The torque specs of your LS engine will depend on the model, manufacturer, and the RPO of your vehicle. The common LS engine is ranged at 475 Nm with 345 Hp.
Torquing the bolts of an oil pan should be a hassle-free process if you have the right specs and know the right procedure. All you have to do is make sure you confirm the torque specs from your vehicle model and follow the right sequence accordingly.
We hope this article helps you out when you have to torque the oil pan in your car next time. Remember, if nothing else works, reach out to your nearest automobile professional.
Thank you for reading!