2021-2026 Honda CR-V Oil Leak at Timing Chain Tensioner

Honda has released Service Bulletin 25-077 to address an oil leak issue affecting 2021-2026 CR-V models equipped with the 1.5L Turbo engine. This bulletin provides detailed diagnostic and repair procedures for technicians to resolve the Honda CR-V oil leak originating from the timing chain tensioner inspection cover.

The primary cause identified for this Honda CR-V oil leak is insufficient sealant adhesion on the inspection cover. Owners who notice oil leaks in this area should have their vehicle inspected by an authorized Honda dealer.

Symptoms

The most direct symptom of this issue is an "Oil leak at timing chain tensioner inspection cover."

Diagnosis

To accurately identify the source of the oil leak, technicians are instructed to perform an engine oil leak diagnostic using the specialized Honda Leak Detection Kit. This process involves several steps:

1. With the engine off and the engine cover removed, technicians will use specific pliers to pinch off the breather tube and the PCV tube.
2. The engine oil dipstick is removed.
3. An appropriately sized fitting is inserted into the engine oil level dipstick hole.
4. An air pump hose is connected to the fitting and then to the supplied air pump.
5. The air pump is turned on.
6. After two minutes, the crankcase's air pressure is confirmed by pulling out the fitting and listening for a pressure release. If no pressure release is heard, technicians must check for properly pinched or blocked hoses and repeat the process.
7. The right front wheel is removed, and the underbody splash shield is pulled down to access the tensioner inspection cover.
8. The suspected engine oil leak area is sprayed with soapy water.
9. Technicians then look for air bubbles, which confirm the presence and location of the leak.

Repair Procedure Summary

If the leak is confirmed at the Cam Chain Tensioner Inspection Cover, the following steps are taken:

1. The Timing Chain Tensioner Inspection Cover is removed.
2. Any old sealant is thoroughly removed from both the Timing Chain Cover and the Inspection Cover using a scouring pad.
3. A 2.5 mm bead of new sealant, specifically Hondabond HT Silicone Gasket (Part Number 08718-0004), is applied to the Inspection Cover. It is crucial that the cover is reinstalled within four minutes of sealant application.
4. The cover is reinstalled, and the bolts are torqued to 9 lb-ft.
5. Finally, the Engine Oil Leak Detection Kit is removed, and all previously removed parts are reinstalled in reverse order.

Required Tools or Parts

To perform this repair, specific tools and materials are necessary:

• LEAK DETECTION KIT (Part Number: 07AAJ-5A2A100): This is a special tool auto-shipped to Honda dealers. Additional kits can be ordered through the Honda Tool and Equipment Program by calling (888) 424-6857 or searching "engine oil leak detection kit" on the iN system.
• Hondabond HT Silicone Gasket (Part Number: 08718-0004): One tube is sufficient for approximately five repairs.
• Cover, Chain Case (Part Number: 11412-59B-000): This part should only be ordered if the original cover is damaged and cannot be reused.

Warranty Claim Information

For warranty claims related to this Honda CR-V oil leak, technicians should use the following information:

• Operation Number 1107A3: For performing the engine oil leak diagnosis and resealing the timing chain inspection cover. Flat Rate Time: 0.6 hours. Defect Code: 07408. Symptom Code: 05011. Template ID: A25077A. Failed Part Number: 11412-59B-000.
• Operation Number 1101KH: For performing the engine oil leak diagnosis and replacing the timing chain inspection cover. Flat Rate Time: 0.6 hours. Defect Code: 07408. Symptom Code: 05011. Template ID: A25077B. Failed Part Number: 11412-59B-000.

Important Warnings

Honda emphasizes that the information in this bulletin is intended for use exclusively by skilled technicians who possess the proper tools, equipment, and training required to correctly and safely maintain vehicles. These procedures are not recommended for