Oil Leak, have a couple of questions - Nissan Murano Forum
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#1 Old 11-26-2007, 10:32 PM
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Oil Leak, have a couple of questions

Hello all, these forums are great!

This is the first Nissan we have owned, so I am not familier with how these are setup.

We bought a 2003 Murano SE with around 65k on it a couple of week ago. It's already leaking oil in the garage

From searching the forums I have learned that there is an oil cooler that the filter screws into. The best I can tell, the oil is coming from under the oil cooler.

Does the oil cooler thread into the block, and the filter into the oil cooler? Is there a gasket between block and cooler?

Is this a common issue? It's not gushing oil, but it's annoying.

Any help is greatly appreciated.
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#2 Old 11-26-2007, 11:26 PM
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Welcome nathank;
I would first recommend using some degreaser/engine shampoo type of product under your engine and power wash any existing residue at your local power wash(coin op. type).
That way you will be able to track where the oil is coming from. Oil; being fluid like water will find the path of least resistance.
Can you tell from your drips what colour the oil is?
When you refer to the "filter"; do you mean the oil filter? If so, the engine oil filter is located behind the plastic spash wheel well on the passenger side.
I have an '03 but I don't believe that it is a common issue.
Had it had an oil change lately? Sometimes careless "techs" don't hit the fill-hole and the oil can drizzle down the block and find it's way down until it drips.
Perhaps if it is directly below the oil filter; the filter could use a little "hand-tightening"(only by hand).
I would first try to find out where it may be coming from(upper block or down below) by washing it clean.
Let us know what you find out.
There are many heads here eager to help out.
Cheers!

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#3 Old 11-26-2007, 11:42 PM
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nathank;
I just looked over the service manual regarding where the oil cooler/oil filter is.
If it is oil that is leaking; there is an O-ring between the "oil cooler" and the block. The Oil cooler is attached to the block with the means of the threaded "connector bolt". The connector bolt is what the oil filter threads onto. That bolt is tightened to a torque between 34-40 ft.-lb.
If the leak is water(coolant); there are two water hoses connected to the oil cooler. One before and one after. They sometimes swell and rupture if too much oil gets on them. They are connected to the rigid water pipe with clamps.
It could be that the Connector Bolt may need tightening to compress the O-ring behind the oil cooler?

'03 Silver SL AWD w/Sunroof - SOLD
Original Alternator (Just got the NEW recall Alt :-)
Air Lift Rear Suspension
Thule Roof Rack system
Curt Hitch
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'07 Volvo XC90 V8 AWD
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#4 Old 11-27-2007, 12:21 AM
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nathank-

Welcome to the forum.

The attached diagram is from the 2005 Service Manual. I hope it helps.

-njjoe
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#5 Old 11-27-2007, 09:22 AM
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Fluid is definitely oil. Coolant lines both look fine.

I will clean it down this evening to verify that's where it's coming from but from what I could see it looks to be the case. Everything above the oil filter/cooler is clean and there is oil running below the cooler.

Anyone have the part # for that O-ring?
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#6 Old 11-28-2007, 04:01 PM
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oil cooler o ring leak

I have a used 2003 Murano with 65,000 miles. It has the exact oil leak that you describe- just a drop or two at a time. I traced the leak to the engine block side of the oil cooler that the oil filter screws on. I think a change of the o ring will cure the pesky problem, now it's just to find the right part # for the ring and replace it from the right wheelwell access point. Let me know if anyone comes up with the part #. Thanks. Gp
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#7 Old 11-28-2007, 04:05 PM
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Yes, if anyone has this part number it would be greatly appreciated!

I am going to do oil change, and replace O-ring in the process this weekend.
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#8 Old 11-28-2007, 04:39 PM
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nathank & GLPorter-

You should not need a part number. The dealer's parts-man behind the counter should know what you are referring to. You can also print out the diagram above and show it to him.

A few members have reported that the connector bolt (item#10 in the diagram) came loose when they removed the oil filter. It is very possible that the bolt simply needs to be tightened. Tighten it to the factory spec which is 37 foot-pounds.

Good luck.

-njjoe

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-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
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-Aluminum fuel tank shields
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#9 Old 11-28-2007, 04:45 PM
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Quote:
Originally posted by njjoe
nathank & GLPorter-

You should not need a part number. The dealer's parts-man behind the counter should know what you are referring to. You can also print out the diagram above and show it to him.

A few members have reported that the connector bolt (item#10 in the diagram) came loose when they removed the oil filter. It is very possible that the bolt simply needs to be tightened. Tighten it to the factory spec which is 37 foot-pounds.

Good luck.

-njjoe
I do hope that is the case. However, I would like to have the O-ring on hand just in case I need it. Surely it doesn't cost too much.

I'll print the diagram and see if I can hunt the part down tomorrow.
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#10 Old 11-29-2007, 02:02 PM
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Part # is

B130443U00

of course my dealer doesn't stock it.
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#11 Old 11-29-2007, 02:15 PM
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Quote:
Originally posted by nathank
Part # is

B130443U00

of course my dealer doesn't stock it.
n-

Did he at least provide you with an ETA?

What are they charging you for this "off-the-shelf" o-ring?

-njjoe

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-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
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-Aluminum fuel tank shields
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#12 Old 11-29-2007, 03:03 PM
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They told me they don't stock it period, that I would have to drive to the other dealer to get it.

Part is $5.50
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#13 Old 11-29-2007, 03:35 PM
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Quote:
Originally posted by nathank
They told me they don't stock it period, that I would have to drive to the other dealer to get it.

Part is $5.50
What? They can't order it? What would have happened if you brought you MO in to have them repair your oil cooler leak and they found the o-ring to be damaged? What then?

Now that is the kind of service we have come to love and expect from our great Nissan dealer network.

My guess is that if you went down the block to the Infinity dealership and asked for the same out-of-stock part they would offer to order it and call you when it arrived in a day or two.

Nissan Customer Service - an oxymoron if there ever was one.

-njjoe

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-OEM HID conversion & HID fogs
-OEM iPod interface
-Upgraded (non-Bose) speakers - Pioneer TS-A1702C & TS-G1643R
-Muth signal mirrors
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-Aluminum fuel tank shields
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#14 Old 11-29-2007, 03:42 PM
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And don't get me started about waiting at the parts counter for 20mins before anyone even helped me.

My other vehicle is a Ford Lightning. The Ford parts people know what they are doing. Of course I don't know what that says about Fords if their parts people are so practiced... perhaps they break more?
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#15 Old 12-15-2007, 01:31 PM
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I've only had one oil leak. It drove me nuts trying to figure out where it was coming from. I ended up taking it to the dealer. I was told it was the o-ring from the oil-pump. It was fixed under warranty and hasn't leaked since.
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