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  #1  
Old 04-13-2011, 05:28 PM
bassplyer92517 bassplyer92517 is offline
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Default Oil Leak Help Please

So I have an oil leak, extremely small, not even getting drops on the ground. But the front of the transmission pan definitely has oil on it, and I have cleaned it and watched again to make sure it was transmission fluid. Plus, every 3,000 miles my oil level will go down about 1/4. I was thinking rear main seal, would that be a valid assumption?

A little background, about two months ago I had a shop put a "used" engine in my truck when I hydrolocked it. It is covered by their warranty for everything. So my next question, if it IS a rear main seal leak, would that have been something they would have replaced/touched and be covered by the warranty? If not, I'm screwed, but if so it looks like they may have to pull the engine or tranny again.
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  #2  
Old 04-13-2011, 09:28 PM
bassplyer92517 bassplyer92517 is offline
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Default Re: Oil Leak Help Please

Anyone have any input?
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  #3  
Old 04-13-2011, 09:51 PM
Cdy291 Cdy291 is offline
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Default Re: Oil Leak Help Please

The 3.0 engine has no rear seal on the oil pan. It has one seal around the top where it contacts the engine. That is definitely something related to the engine they put in. The oil pan can be taken off and repaired without lifting the engine, just have to remove the starter.
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  #4  
Old 04-13-2011, 09:55 PM
bassplyer92517 bassplyer92517 is offline
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Default Re: Oil Leak Help Please

Quote:
Originally Posted by Cdy291 View Post
The 3.0 engine has no rear seal on the oil pan. It has one seal around the top where it contacts the engine. That is definitely something related to the engine they put in. The oil pan can be taken off and repaired without lifting the engine, just have to remove the starter.
Sweet! Thanks for the info. That is great to know. I was thinking that if it was something that would cost them a lot of time and money they would try to shove the bill on me somehow, but now that i know that I should be in the clear
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Old 04-13-2011, 10:01 PM
Cdy291 Cdy291 is offline
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Default Re: Oil Leak Help Please

The 3.0 engine sucks as far as efficentcy but its very easy to get the oil pan off. The 2.3 liter not so much.
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  #6  
Old 04-13-2011, 10:04 PM
bassplyer92517 bassplyer92517 is offline
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Default Re: Oil Leak Help Please

Quote:
Originally Posted by Cdy291 View Post
The 3.0 engine sucks as far as efficentcy but its very easy to get the oil pan off. The 2.3 liter not so much.
I've also heard the 3.0 is good for reliability though. Even though its ridiculously slow
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Old 04-13-2011, 10:10 PM
Cdy291 Cdy291 is offline
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Default Re: Oil Leak Help Please

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Originally Posted by bassplyer92517 View Post
I've also heard the 3.0 is good for reliability though. Even though its ridiculously slow
True.
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  #8  
Old 04-14-2011, 09:26 AM
Fordzilla80 Fordzilla80 is offline
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Default Re: Oil Leak Help Please

Quote:
Originally Posted by Cdy291 View Post
The 3.0 engine has no rear seal on the oil pan. It has one seal around the top where it contacts the engine.
This statement makes no sense at all man. You say it has no rear seal, but then you say it has one around the top where it contacts the engine.
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Old 04-14-2011, 10:27 AM
CUTiger CUTiger is offline
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Default Re: Oil Leak Help Please

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Originally Posted by Fordzilla80 View Post
This statement makes no sense at all man. You say it has no rear seal, but then you say it has one around the top where it contacts the engine.
Hes just saying there is a seal between the block and the oil pan.

It also has a rear main seal(which is what the OP was asking about) in the back of the block which seals around the crankshaft. I'm fairly sure it is a one piece which requires you to drop the transmission to replace. This is part of the engine so it should be covered under warranty.

Something else to check is the grommet around the PCV and the hose going from it to the upper intake manifold. I thought for the longest time that I had a rear main seal leak until I was changing my spark plugs and noticed oil leaking from around the PCV. Since the oil was running down the back of the engine it looked identical to a rear main seal leak from underneath.
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  #10  
Old 04-14-2011, 10:34 AM
Tommy2 Tommy2 is offline
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Default Re: Oil Leak Help Please

Quote:
Originally Posted by Cdy291 View Post
The 3.0 engine sucks as far as efficentcy but its very easy to get the oil pan off.
Not sure what you're basing that on. I just changed the oil pan on my 3.0 Ranger - and you more or less have to pull the motor.

I just pulled the whole motor so I could do the front and rear seals while I was at it.

Otherwise you have to pull all the passenger side suspension parts - and then lift the motor/tranny and fish out the oil pan. The book says you need 2 inches of clearance - but from what people who have done it told me - it's more like 10 inches. That's why I decided to pull the motor on mine.


For the OP - definitely sounds like the rear main. Honestly, if you're not losing a ton of oil - I would just live with it. Stay aware of it, check the oil once a week, etc..
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  #11  
Old 04-14-2011, 10:39 AM
DeepSouthRanger DeepSouthRanger is offline
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Default Re: Oil Leak Help Please

Also check the rear of the valve covers.. It's another common place for a leak that runs down the back of the engine.
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  #12  
Old 04-14-2011, 11:11 AM
BisketFx4 BisketFx4 is offline
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Default Re: Oil Leak Help Please

I with out looking at it I would say it's the rear main seal
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Originally Posted by 01DangerRanger View Post
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  #13  
Old 04-14-2011, 11:20 AM
bassplyer92517 bassplyer92517 is offline
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Default Re: Oil Leak Help Please

Quote:
Originally Posted by Tommy2 View Post
Not sure what you're basing that on. I just changed the oil pan on my 3.0 Ranger - and you more or less have to pull the motor.

I just pulled the whole motor so I could do the front and rear seals while I was at it.

Otherwise you have to pull all the passenger side suspension parts - and then lift the motor/tranny and fish out the oil pan. The book says you need 2 inches of clearance - but from what people who have done it told me - it's more like 10 inches. That's why I decided to pull the motor on mine.


For the OP - definitely sounds like the rear main. Honestly, if you're not losing a ton of oil - I would just live with it. Stay aware of it, check the oil once a week, etc..
I would just leave it, but this shop just replaced my engine. If any little thing is wrong with it I want them to fix it while its under warranty, otherwise it will just get worse someday and i'll have to pay for it.

----------

Quote:
Originally Posted by CUTiger View Post
Hes just saying there is a seal between the block and the oil pan.

It also has a rear main seal(which is what the OP was asking about) in the back of the block which seals around the crankshaft. I'm fairly sure it is a one piece which requires you to drop the transmission to replace. This is part of the engine so it should be covered under warranty.

Something else to check is the grommet around the PCV and the hose going from it to the upper intake manifold. I thought for the longest time that I had a rear main seal leak until I was changing my spark plugs and noticed oil leaking from around the PCV. Since the oil was running down the back of the engine it looked identical to a rear main seal leak from underneath.
I will take a look around there, thanks!
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