Installing 1Zz Oil Pan In 2Zz Celica: A Comprehensive Guide

The Toyota Celica is a great starter car for those willing to put in the work. However, the 2ZZ engine has an inferior oil pan that can cause oil starvation and even engine failure. The 1ZZ oil pan is baffled and can be modified to fit the 2ZZ engine. This involves cutting a small piece of metal to fit the 2ZZ engine. It is important to note that installing an engine is not child's play and severe damage can occur if done incorrectly. It is recommended that a trained professional perform the installation.

Identify the need for modification

The 1ZZ oil pan is different from the 2ZZ oil pan in that it has a windage tray built into it. This tray will need to be modified to fit the 2ZZ oil pickup. The 2ZZ oil pan is also inferior in that it lacks baffles, which means that oil can slosh from side to side when cornering. This can lead to oil starvation and engine failure. The 1ZZ oil pan has baffles that help to contain the oil, making it a better option for performance driving.

The 1ZZ oil pan can be modified to fit the 2ZZ engine by cutting a notch in the windage tray to accommodate the 2ZZ oil pickup. This can be done with a Dremel tool or an angle grinder. Some people also choose to weld baffles into the 2ZZ oil pan or use a spacer to increase the oil pickup depth.

Another option for those looking for a high-performance oil pan is to purchase an aftermarket pan like the MWR Moroso Oil Pan, which fits both the 1ZZ and 2ZZ engines. This pan has a larger capacity and internal baffling to prevent oil starvation. It also has a bung for a turbo oil return and an oil temperature sensor.

It is important to note that the 1ZZ and 2ZZ engines have different oil capacities and effective oil pan baffling. The 2ZZ engine is more performance-oriented and may require a different oil pan to accommodate its higher demands.

Prepare the tools and materials

To install a 1ZZ oil pan into a 2ZZ Celica engine, you will need to prepare the necessary tools and materials. Here is a detailed list to help you get started:

• A new oil pan gasket: Gasket materials vary depending on the type of metal it is intended to seal. It is important to obtain the appropriate gasket for your vehicle. Name-brand gaskets typically come with the necessary sealants.
• Service manual: A service manual will be extremely valuable when removing the old oil pan and installing the new one. It will provide illustrations of the oil pan bolt locations and vehicle-specific procedures.
• Basic tools: These include a screwdriver, mallet, wrenches, and a gasket scraper or similar tool to remove the old gasket material without damaging the engine block.
• Degreaser: This is used to clean the engine and trace any oil leaks.
• Modeling clay and a ruler: These tools can be used to check the clearance between the oil pan and the pickup.
• Thread sealer: Some oil pan bolts may require the use of thread sealer.
• RTV silicone: RTV silicone can be used as an alternative to gaskets or in addition to them to seal gaps between the oil pan and the engine block.
• New oil: After installing the new oil pan, you will need to refill the crankcase with fresh oil.
• Safety equipment: This includes gloves and eye protection to ensure your safety during the installation process.

Once you have gathered all the necessary tools and materials, you can proceed with the installation process, following the instructions in your service manual and adhering to any vehicle-specific procedures. Remember to work carefully and double-check all your connections to avoid leaks.

Remove the old oil pan

To remove the old oil pan from your Celica's 2ZZ engine, you'll need to break the seal between the oil pan and the engine block. Here's a step-by-step guide on how to do it:

Step 1: Prepare the Car

• Park your car on a level surface and engage the parking brake.
• Place wheel chocks around the tyres for added safety.
• Lift the front of the car using a jack and support it securely on jack stands.
• Locate the oil pan underneath the engine. It's the metal container at the bottom of the engine that holds the engine oil.

Step 2: Drain the Oil

• Place an oil drain pan or container underneath the oil pan drain plug.
• Remove the drain plug using an appropriate-sized socket or wrench.
• Allow the oil to drain completely. This may take several minutes.
• Reinstall the drain plug securely.

Step 3: Breaking the Seal

• Using a putty knife, carefully work your way around the perimeter of the oil pan to break the seal.
• You can also use a prying tool, such as a pry bar or a small screwdriver with a hammer, but be careful not to damage the pan or the engine block.
• If needed, use a specialty tool designed for separating oil pans to avoid scratching the pan or the block.

Step 4: Removing the Oil Pan

• Locate the bolts or nuts securing the oil pan to the engine block.
• Remove all the bolts or nuts using the appropriate tools.
• Gently wiggle and pull the oil pan downwards to detach it from the engine block.
• Be careful not to bend or damage the oil pan or any surrounding components.

Step 5: Clean-up

• Once the oil pan is removed, clean the mounting surface on the engine block to remove any residual gasket material or debris.
• Ensure the surface is smooth and free of any residue before installing the new oil pan.

Remember to dispose of the old oil and the oil pan responsibly at an authorised facility.

Modify the new oil pan to fit the engine

To modify the new oil pan to fit the engine, you will need to make some adjustments to the windage tray. The windage tray on the 1ZZ pan needs to be cut so that it fits the 2ZZ pickup. This can be done with a Dremel tool for a clean cut.

Firstly, use painter's tape to mark the area that needs to be cut. Fit the 1ZZ pan to the 2ZZ engine and wiggle it slightly, so that the tape scrapes against the engine. This will indicate the exact place where the notch needs to be cut.

It is important to note that some 1ZZ pans may fit without any modifications, while others may require adjustments due to manufacturing tolerances. The oil pickup support may also be a factor, as it could be welded at a slight angle or bolted at a different height, affecting the clearance between the pan and the pickup.

Additionally, consider the oil capacity and internal baffling of the oil pan. The 1ZZ pan has a windage tray built into it, which helps to contain the oil and prevent oil starvation. However, the 2ZZ pan is known to have oil system issues, with inadequate oil capacity and ineffective baffling, leading to potential oil pickup problems when driving hard or cornering. Upgrading to a high-capacity aluminium performance oil pan, such as the MWR Moroso Oil Pan, can help address these issues.

Install the new oil pan and test the vehicle

Now that you've modified your 1ZZ oil pan to fit your 2ZZ Celica engine, it's time to install the new oil pan and test your vehicle. Here's a step-by-step guide:

Step 1: Prepare the Engine

Before installing the new oil pan, make sure your engine is prepared. If you're replacing the engine with one of the same type, transfer over any necessary parts from your old engine, such as manifolds, injectors, and the knock sensor. Additionally, ensure that the cast engine mount that bolts to the timing cover is compatible with your vehicle.

Step 2: Remove the Old Oil Pan

Place an oil drain pan under the engine to catch any residual oil. Remove the bolts securing the old oil pan and carefully lower it from the engine. Clean the mating surface of the engine block to ensure that there is no residue or debris that could affect the seal of the new oil pan.

Step 3: Install the New Oil Pan

Position the new 1ZZ oil pan into place, ensuring that the modified section aligns correctly with the 2ZZ engine. Secure the oil pan using the appropriate bolts and torque specifications. Refer to a service manual or a trusted online forum for the correct torque values.

Step 4: Reinstall the Oil Drain Plug

Locate the oil drain plug and gasket, which is typically at the bottom of the oil pan. Clean the drain plug and gasket to ensure no debris or residue remains. Reinstall the oil drain plug and gasket, tightening them to the specified torque value.

Step 5: Refill Engine Oil and Check for Leaks

Using the recommended engine oil for your vehicle, refill the engine with the specified amount of oil. Check for any leaks around the oil pan and drain plug. If no leaks are present, proceed to the next step.

Step 6: Start the Engine and Check Oil Pressure

Start the engine and allow it to run for a few minutes. Check the oil pressure gauge to ensure that the oil pump is functioning correctly and that adequate oil pressure is being generated.

Step 7: Test Drive the Vehicle

Once the engine has reached operating temperature, take the vehicle for a test drive. Drive it under various conditions, including highway and city driving, to ensure that the oil pan is functioning correctly. Pay attention to any unusual noises or warning lights during the test drive.

Step 8: Re-Torque the Oil Pan Bolts

After the test drive, park the vehicle on a level surface and allow the engine to cool down. Re-torque the oil pan bolts to the specified values using a torque wrench.

Step 9: Check Oil Level and for Leaks Again

With the vehicle parked on a level surface, check the engine oil level using the dipstick. Ensure that the oil level is within the recommended range. Also, inspect the area around the oil pan and drain plug for any signs of leaks.

Step 10: Monitor for Any Issues

Continue to monitor the vehicle's performance and oil level over the next few days. If the oil level remains stable and there are no unusual noises or warning lights, your new oil pan installation is likely successful.

Remember, it is essential to be cautious and methodical when working on your vehicle. Always refer to a trusted mechanic or a service manual for specific instructions and torque values. Do not attempt this installation if you are uncomfortable with the procedure, as incorrect installation can lead to severe engine damage.

Frequently asked questions