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'04-Mystery Oil Leak-NOT Rear Main Seal

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Old 12-20-2012, 08:54 PM
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Default '04-Mystery Oil Leak-NOT Rear Main Seal

A little background:
2004 Acura TSX-Auto
Mileage: 189,000 miles (Mostly Highway)

The car developed a medium sized oil leak coming from the passenger side of the motor. The oil pan appears to be leaking, but the main leak does not seem to be coming from there. The oil appears to be hitting the belt on that side of the engine and slinging everywhere (around the AC compressor pulley, as high as just below the VC, and everywhere in between).

We took the car to a local Honda dealership that used dye to find the leak. They could not find the leak anywhere. They said they would need a week to find it and we just don't have the time to leave the car somewhere for a week.

Does anyone have any idea what could be leaking on that side of the motor? I can provide pictures, but there is really no indication that it is coming from any particular area. I know for a fact that the valve cover is not leaking.

Any help is appreciated.
Old 12-21-2012, 07:10 PM
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Default Re: '04-Mystery Oil Leak-NOT Rear Main Seal

It could be the crank pulley leaking or Valve Seals or the Piston rings (Blow by)
Old 12-23-2012, 12:24 AM
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Default Re: '04-Mystery Oil Leak-NOT Rear Main Seal

Originally Posted by zelseman
A little background:
2004 Acura TSX-Auto
Mileage: 189,000 miles (Mostly Highway)

The car developed a medium sized oil leak coming from the passenger side of the motor. The oil pan appears to be leaking, but the main leak does not seem to be coming from there. The oil appears to be hitting the belt on that side of the engine and slinging everywhere (around the AC compressor pulley, as high as just below the VC, and everywhere in between).

We took the car to a local Honda dealership that used dye to find the leak. They could not find the leak anywhere. They said they would need a week to find it and we just don't have the time to leave the car somewhere for a week.

Does anyone have any idea what could be leaking on that side of the motor? I can provide pictures, but there is really no indication that it is coming from any particular area. I know for a fact that the valve cover is not leaking.

Any help is appreciated.
check the vtc actuator o-ring they tend to leak, and it's hard to see the leak due to their position.
Old 09-30-2013, 10:59 AM
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Default Re: '04-Mystery Oil Leak-NOT Rear Main Seal

Originally Posted by zelseman
A little background:
2004 Acura TSX-Auto
Mileage: 189,000 miles (Mostly Highway)

The car developed a medium sized oil leak coming from the passenger side of the motor. The oil pan appears to be leaking, but the main leak does not seem to be coming from there. The oil appears to be hitting the belt on that side of the engine and slinging everywhere (around the AC compressor pulley, as high as just below the VC, and everywhere in between).

We took the car to a local Honda dealership that used dye to find the leak. They could not find the leak anywhere. They said they would need a week to find it and we just don't have the time to leave the car somewhere for a week.

Does anyone have any idea what could be leaking on that side of the motor? I can provide pictures, but there is really no indication that it is coming from any particular area. I know for a fact that the valve cover is not leaking.

Any help is appreciated.
What did you finally figure out that was leaking? I have the identical issue. I'm thinking it is the Crank Pulley seal, but can't verify. Any information would be appreciated. Thanks!
Old 11-04-2013, 03:50 AM
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Could be your crank seal on pulley side or timing chain cover
Old 11-11-2013, 12:13 PM
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Default Re: '04-Mystery Oil Leak-NOT Rear Main Seal

its your power steering pump going out bro.....check it out! mines currently leaking right now and i thought it was oil but really it was power steering fluid. keep us updated
Old 11-18-2013, 05:02 AM
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Default Re: '04-Mystery Oil Leak-NOT Rear Main Seal

Turns out mine was the Front Main Seal (Crank Pulley Seal). I did the repair myself and it was pretty straight forward - took about an hour. The OEM seal cost me about $20, I also had to buy a fairly inexpensive Honda pulley socket and bigger breaker bar to torque it back to specs. There's a neat little trick to getting the pulley off. I plan on posting some pics soon.
Old 11-18-2013, 07:47 AM
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Nice the only thing is. Was the crank pulley covered in oil from the inside ?
Keep an eye on that because if oil soaks up the pulley it will separate into two pieces
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