Rear Main Seal is leaking after oil change - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 44 Old 07-21-2015, 06:54 PM Thread Starter
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Rear Main Seal is leaking after oil change

Hey guys, something very strange just happened when I changed the oil on my 03 accord V6. I changed the oil and the next day the rear main seal is leaking big time. Has anyone every seen this happen before or would know what might have caused this? The car has 180K on it and I didn't overfill when I did the oil change. I used a Bosch filter and the only thing I can think of is maybe the filter was defective or maybe it isn't related to the oil change.

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post #2 of 44 Old 07-21-2015, 07:28 PM
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Coincidental timing or oil is leaking from somewhere (filter or plug) and is making it appear that the rear main is leaking. Clean it, make sure everything is tight, drive it for a day or two, recheck.


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post #3 of 44 Old 07-21-2015, 07:50 PM
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New oil is usually thicker than used oil...So maybe slightly higher oil pressure was the straw that broke the camels back.

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post #4 of 44 Old 07-21-2015, 08:39 PM
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pcv plugged up?

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post #5 of 44 Old 07-21-2015, 09:24 PM
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Did you stay with the same weight oil? Did you switch to synthetic?

Honda V6 are know for rear main seal leaks as mileage & age climb.


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post #6 of 44 Old 07-21-2015, 10:37 PM
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Check if the oil filter is tightened it may be loose and the pressure may be squirting around
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post #7 of 44 Old 07-22-2015, 03:54 AM Thread Starter
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Quote:
Originally Posted by accord04ex View Post
Check if the oil filter is tightened it may be loose and the pressure may be squirting around
I checked the filter. Also installed another oil filter thinking maybe there was something up with the other one. Still leaking. There could have been some wrong with the filter and the damage was already done.

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Coincidental timing or oil is leaking from somewhere (filter or plug) and is making it appear that the rear main is leaking. Clean it, make sure everything is tight, drive it for a day or two, recheck.
That maybe the case.

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New oil is usually thicker than used oil...So maybe slightly higher oil pressure was the straw that broke the camels back.
I was thinking the same thing. Maybe the thickness in the new oil pushed the seal over the edge.

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pcv plugged up?
I replaced the PCV several months ago with an OEM one. But possibly the new is bad.

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Did you stay with the same weight oil? Did you switch to synthetic?
Yep, same weight and same brand that I've been using since the car was new.
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post #8 of 44 Old 07-22-2015, 04:18 AM
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Switch to high mileage oil. Your car isn't new anymore.
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post #9 of 44 Old 07-22-2015, 04:34 AM Thread Starter
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You're right. car is far from New. Going to switch to high mileage oil the next oil change. Not sure if that would have prevented anything or not. The wasn't leaking a drop of oil until last oil change. I need to do some research on high mileage oil to understand the benefits.
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post #10 of 44 Old 07-22-2015, 05:36 AM
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Are you positive it's the rear main seal? Take a picture first with the inspection cover removed by the drive plate and post it here.

I had an oil leak from the VTEC solenoid area, just changed the gasket 2 days ago. It appeared to be a huge oil leak because of the spread.
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post #11 of 44 Old 07-22-2015, 05:54 AM Thread Starter
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Originally Posted by t-rd View Post
Are you positive it's the rear main seal? Take a picture first with the inspection cover removed by the drive plate and post it here.

I had an oil leak from the VTEC solenoid area, just changed the gasket 2 days ago. It appeared to be a huge oil leak because of the spread.
I removed the inspection cover and cleaning the oil off with brake cleaner. I then started the car up and just let it idle in the garage. It is leaking in the area of the rear main seal. I'll go double check and make sure the oil pan isn't leaking. Thanks for the help.
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post #12 of 44 Old 07-22-2015, 06:19 AM
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The cheap fix for now is to use high mileage oil to make the seal swell and stop the leak. But eventually, you still have to drop the transmission to get the $8 seal fixed.
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post #13 of 44 Old 07-22-2015, 08:26 AM Thread Starter
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Originally Posted by t-rd View Post
The cheap fix for now is to use high mileage oil to make the seal swell and stop the leak. But eventually, you still have to drop the transmission to get the $8 seal fixed.
Thanks t-rd. I will try that. Samething salcuta88 mentioned. Might be too late since, it is leaking pretty bad. But it is worth a try.
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post #14 of 44 Old 07-22-2015, 08:47 AM
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You can try this, but I cannot attest to its validity,




I was looking at this myself because mine is starting to leak a little.
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post #15 of 44 Old 07-22-2015, 10:42 AM Thread Starter
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Quote:
Originally Posted by t-rd View Post
You can try this, but I cannot attest to its validity,



I was looking at this myself because mine is starting to leak a little.
Thanks man, I'll try the high mileage oil first and if that doesn't work I'll try the Seal Stops Leaks. I usually don't like to use this stuff, but I really don't want to remove trans. to install a new seal.

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