I need help locating an oil leak?

Tiny
AVID LEARNER
  • MEMBER
  • 2002 HONDA ACCORD
  • 2WD
  • AUTOMATIC
  • 252,279 MILES
Hello, my car is leaking oil. I would like to know where the oil leak might be.

There is an oil stain on the right and left side of the engine. The stain on the left side is beside the serpentine belt. My serpentine belt looks worn out so I am going to get it changed but I'm not sure if a worn-out serpentine belt can cause an oil leak. The oil stain next to the serpentine belt looks and feels old but the oil stain from the left side feels recent. I took several pictures and a video from under the left side of the car and noticed the oil looked and felt recent. I apologize for the poor video quality from under the car, I didn't have the tool to lift my car up to take a better video so I just took the best video I can. I'm not sure if it's relevant but I recently got an oil change. All in all, it's unrealistic for me to ask the exact location of the oil leak from just a few pictures and videos so all I ask is to for you to give me your best guest, I greatly appreciate it.
Sunday, May 7th, 2023 AT 3:51 PM

9 Replies

Tiny
BRENDON S
  • MECHANIC
  • 653 POSTS
Good morning, AVID LEARNER,

A worn-out serpentine belt won't cause an oil leak but an oil leak that gets on the belt could cause it to degrade. It could be the O-ring seal behind the distributor on the passenger side. I am adding a picture of this and instructions on how to replace it. It's very easy.

The instructions have you take the spark plug wires off, you don't need to do that because you are not replacing the distributor. Just need to remove the bolts, unplug the connector on the side and pull it off. Take note of its position for installation.

Then coat the new seal in a little oil with your fingers so when the distributor is installed it slides right in and doesn't tear the new seal.

I would recommend getting the seal from the dealer that way you know it fits. You will need to bring your VIN. Last thing you want is it to leak again cause the seal from the auto parts store isn't the right thickness.

The driver's side it looks like it might be a line on the power steering pump or valve cover gasket.

I would clean the engine with brake cleaner and a rag. Having an engine soaked in oil is not only a fire hazard but makes it a lot harder to find other leaks. Since it seems like you may have multiple leaks, it's a good idea to fix one, clean the engine, and let it leak again so you can pinpoint where it is coming from.

I am adding the procedure for replacing the valve cover gasket for you in case you need it. In these instructions there is no removal procedure.

So here is how to remove it:
I would use a piece of masking tape on each plug wire and number them according to the cylinder locations. Cylinder 1 is closest to the serpentine belt. Next to it is 2 and so on. Once they are labeled, carefully remove the wires leaving them plugged into the distributor and set aside. Remove the bolts holding the valve cover on and remove cover. Once removed follow the installation instructions provided.

In these instructions it refers to using liquid gasket at the four corners of the valve cover gasket. I suspect this is where the leak may be. I would use Permatex black RTV sealant that you can get from the auto parts store. I will add a picture of this for you.

Make sure to clean everything well.

Let me know if I can help any further.

Thank you,
Brendon
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Monday, May 8th, 2023 AT 6:17 AM
Tiny
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  • MEMBER
  • 14 POSTS
Hi Brendon, thank you so much for responding and providing me with valuable information! Since I'm basically new when it comes to car parts It will probably take me some time to locate and familiarize myself with the parts that you mentioned before I can actually get started on attempting to remove and fix anything. In regards to tools, all I have is a $20 tool kit I bought from Walmart a few months back. Hopefully it has the right tools for the job but if not, I'm willing to spend a little over a $100 for the necessary tools. If I determine that I might cause worse than good, can you tell me what price range a mechanic might charge me to get this fixed? Thank you in advance!
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Thursday, May 11th, 2023 AT 6:11 PM
Tiny
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  • MEMBER
  • 14 POSTS
After I clean the oil off everything, would you advise against driving the car at all until I replace the o ring? Or will the car be fine if I drove it a few miles?
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Thursday, May 11th, 2023 AT 9:39 PM
Tiny
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  • MEMBER
  • 14 POSTS
Okay, I've been watching some YouTube videos of where the distributor is located and how to replace the o ring since I don't want to mess up. I realized a couple of things while watching the videos. I realized that there is an o ring located behind the distributor and there is an o ring located in the distributor and both can cause an oil leak. Mi hoping you're right and the oil leak is caused by the o ring behind the distributor since it looks like it easier to replace. If by the off chance the oil is caused by the o ring located in the distributor, will I need to buy a new distributor or can I just replace the o ring in the distributor?
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Thursday, May 11th, 2023 AT 10:19 PM
Tiny
BRENDON S
  • MECHANIC
  • 653 POSTS
Hello AVID LEARNER,

That’s okay, you don’t have a lot of tools; everyone has to start somewhere. I started with a small toolset myself. I use Kobalt from Lowes for a lot of my sockets and extensions. You can get whole sets for decent money, and I have never broken any of them. Plus, anything Kobalt has a lifetime warranty. However, you don’t need a lot of tools to do the distributor or valve cover gasket.

Yes, there is a seal on the driver's side as well. However, the upper timing belt cover, inner timing cover, valve cover, cam sprocket, timing belt and motor mount all need to be removed to replace that seal.

There is a part of the valve cover gasket on both ends that have sharp corners that need RTV to completely seal so the leak could be there on the driver’s side. Because of the scope of work that needs to be done to change the seal on the driver’s side I think it is best to seal up a couple easier areas first.

As for a mechanic and how much they would charge to replace that, it depends on where you live, the shop's hourly rate, dealer or regular shop. The labor time is about an hour to replace the distributor and to rebuild it would be even more. So, they would probably charge you around there. Labor rate can vary widely though. I have seen shops that charge $70.00 an hour and others that charge $120 an hour.

So, if you bring your own part, it could be around $70-$120 but I would call shops near you and ask what they charge an hour.

Hondas are pretty easy to work so it’s a good vehicle to learn on but if you don’t feel comfortable it might be best to bring it to a shop. I will leave that for you to decide.

My advice is to take pictures with your phone before and after removing things and also make marks before removal so you can look back and see how they went together or how they lined up.

Your distributor being lined up is critical for your engine to run correctly or even start.
You can drive it after you clean it up but you will need to check your oil level frequently to make sure your engine has enough in it to prevent engine damage. I would also keep a close eye on the oil leaking out and make sure it isn’t going to get on the exhaust or anything that could start a fire.

So, I would start with the seal behind the distributor.

Make a mark with a paint pen across the gap between the cap and distributor body. I will add a pic of the one I use.

Leave the wires right on the distributor cap. The distributor on your vehicle can only be installed in 2 ways. So, snap a photo or 2 of how it is positioned. Remove the 2 or 3 screws (depends on the engine code) and gently slide the cap off.

If the seal is bad in the distributor, you will more than likely have oil in the distributor, inside the cap or the cap seal may be swollen as well.

If there is then the distributor will have to rebuilt in order to replace the second seal. In my opinion I would just get a whole new distributor at that point. To me it’s not worth rebuilding things anymore especially if your only vehicle. There is one on Rock Auto that is $148. To me this better than rebuilding it because it will be new and clean and won’t cause you anymore problems.

If there isn’t then you can just do the O-ring on the shaft. Unfortunately, with the amount of oil leaking chances are both gaskets are bad.

I am adding a picture of a box with compartments. I use these on jobs to organize and not lose hardware. I just put all the bolt of the saem type in each compartment and add a little piece of paper saying w3hat it when to. For example, “distributor to engine” or “distributor cap”.

One other thing is yes, the car is old so it is going to leak but a lot of times the PCV valve can be bad and cause pressure to build up in the crankcase from something called blow-by gasses. These gases build up and literally push the oil out of your engine. If you haven’t replaced it lately then I would grab one. I will add a picture of it for you. You will also need the grommet for it. These parts are also from Rock Auto for less than $5. This will help prevent future leaks.

Let me know what you find when you pull the distributor cap off and how you want to approach it and what you feel comfortable doing and just let me know. We can go from there.
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Friday, May 12th, 2023 AT 11:35 AM
Tiny
AVID LEARNER
  • MEMBER
  • 14 POSTS
Thank you, Brendon! I'll make sure to mark and take pictures before I attempt to remove anything. I'll do as you say and wipe off the oil stain and replace the o ring behind the distributor. I'll let you know what I find when I pull the distributor cap off, I'll also take pictures and videos to show you exactly what I find. Once I finish with the o ring, I'll do as you say and start working on the PCV valve. I'll monitor for any leaks after I replace the o ring, PCV valve, and the grommet, hopefully the leak stops once I replace them. Thanks again man, the information you provided is really helpful.
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Friday, May 12th, 2023 AT 9:11 PM
Tiny
BRENDON S
  • MECHANIC
  • 653 POSTS
Hello AVID LEARNER,

Awesome and you're welcome! I am happy to help. It's the reason I got into this business in the first place. I used to have a 2004 Civic and I loved that car. It was so easy to work on, there is a lot of room in the engine compartment.

Once we figure out the distributor leak, we can work on the valve cover gasket.

I don't know your schedule but I would pick a weekend to do the work and I will walk you through each step so you can learn these parts, get familiar with the tools and learn to do things the best way.

Hondas are great vehicles, and the best part is the parts are cheap.

Thank you,
Brendon
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Saturday, May 13th, 2023 AT 7:30 AM
Tiny
AVID LEARNER
  • MEMBER
  • 14 POSTS
Thank you for offering to guide me through the steps, fortunately there are several videos of how to remove and replace a 2002 Honda Accord o-ring. I will continue to watch the videos several times to familiarize myself with the process and google anything I might not understand. I'm happy to hear that the parts are cheap, money is tight so that's why I'm investing time to learn how to do this myself. I subscribed to your 2CarPros channel since it has a lot of informative videos, I can watch to educate myself on how to maintain my car. The tools I ordered on Amazon will be coming in tomorrow so I will watch some YouTube videos today and clean off the oil on the surface with a rage and diluted dishwashing soap. I ordered a non-flammable CRC Brakleen brake Parts cleaner to wipe off the oil stain in the distributor casket since dishwashing soap might damage it. I respect your time so I will not take any more of your time than necessary, I will only ask you questions to fill in gaps of what I don't understand if necessary.
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Saturday, May 13th, 2023 AT 3:09 PM
Tiny
BRENDON S
  • MECHANIC
  • 653 POSTS
Good morning, AVID LEARNER,

Sounds good. You need anything let me know. We also have a YouTube channel with a lot of information as well:
https://www.youtube.com/user/2carpros

If you need anything just let me know or start a new question.

Happy wrenching,
Brendon
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Sunday, May 14th, 2023 AT 6:45 AM

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