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2006 Altima 2.5 oil leak #5247607 10/22/19 09:34 PM
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LeakySeals Offline OP
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New to me 2006 Altima 2.5. At the time of sale, the PO stated there was a substantial PS leak. I think it's something else but not sure exactly. Its wet on one of the AC pressure lines. A hint of green dye. Its wet in back underneath somewhere above oil filter.
[Linked Image]
[Linked Image]
[Linked Image]

Are there known leaks on this eng9ne? Any ideas ?


06 Escalade 6.0L LQ9 AWD 170k M1 5w30
03 Maxima 3.5L 170k Maxlife HM 10w30
05 Malibu Classic 2.2 111k M1 5w30
06 Altima 2.5L 167k unk
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5247621 10/22/19 10:11 PM
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Neither of those look serious. The first one is likely the suction host coming off the A/C compressor. The second is just some minor dampness around the body of the P/S pump. I've done plenty of the suction lines, none of the pumps. A good degrease and monitor situation is in order here.


2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

2007 Chevrolet Impala LT
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5247730 10/23/19 05:00 AM
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bullwinkle Offline
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Definitely has a freon leak, might need a recovery & nitrogen pressure test to verify it's a (likely) A/C hose leak.


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5247752 10/23/19 05:47 AM
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MaximaGuy Offline
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The high-pressure hose is leaking at the crimp - very common and almost a necessity to replace after 150K/10yrs.
Bought one from RockAuto and given yours is a V4 its easy to replace - buy the one which has the clamps (extra $10) which save a bunch of time during replacement


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Re: 2006 Altima 2.5 oil leak [Re: MaximaGuy] #5247810 10/23/19 07:20 AM
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LeakySeals Offline OP
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Originally Posted by MaximaGuy
The high-pressure hose is leaking at the crimp - very common and almost a necessity to replace after 150K/10yrs.
Bought one from RockAuto and given yours is a V4 its easy to replace - buy the one which has the clamps (extra $10) which save a bunch of time during replacement


Is that the refrigerant, the pag, both leaving that mess? How did you know how much PAG to put back?


06 Escalade 6.0L LQ9 AWD 170k M1 5w30
03 Maxima 3.5L 170k Maxlife HM 10w30
05 Malibu Classic 2.2 111k M1 5w30
06 Altima 2.5L 167k unk
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5247865 10/23/19 08:27 AM
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NoNameJoe Offline
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Hose the area down with brake cleaner and catch the leak early to figure out where it's coming from if you don't want to mess with dye.

Looks like HS power steering line.


2015 Civic LX Coupe
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5247917 10/23/19 09:26 AM
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LeakySeals Offline OP
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Just noticed the car has no heat idling. Added 1/2 gal of coolant and heat is back. I don't see any visible leaks. Oil was low but looks ok. No smoke. Idles real good for a 4 cyl. Are these 2.5's known for HG?


06 Escalade 6.0L LQ9 AWD 170k M1 5w30
03 Maxima 3.5L 170k Maxlife HM 10w30
05 Malibu Classic 2.2 111k M1 5w30
06 Altima 2.5L 167k unk
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5247919 10/23/19 09:27 AM
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Anduril Offline
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Originally Posted by LeakySeals
Originally Posted by MaximaGuy
The high-pressure hose is leaking at the crimp - very common and almost a necessity to replace after 150K/10yrs.
Bought one from RockAuto and given yours is a V4 its easy to replace - buy the one which has the clamps (extra $10) which save a bunch of time during replacement


Is that the refrigerant, the pag, both leaving that mess? How did you know how much PAG to put back?

Most A/C systems contain dye along with the refrigerant/oil to help identify leaks. It's the oil that physically leaves a mess, refrigerant is a gas. But if it's leaking oil, it's leaking refrigerant.

If you can find a FSM for that car, it should tell you how much oil to add when replacing different components. At least the one for my XTerra did. Of course, that doesn't account for what has already leaked out.

Last edited by Anduril; 10/23/19 09:27 AM.

2015 Nissan Versa Note 1.6/5MT
2012 Toyota Tacoma 2.7/4AT
2007 Toyota Camry 2.4/5AT
2005 Nissan XTerra 4x4 4.0/6MT
2002 Mustang GT Convertible 4.6/5MT
2009 Kawasaki Vulcan 900
2013 Hyosung ST7
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5247967 10/23/19 10:50 AM
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Delta Offline
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Originally Posted by LeakySeals
Just noticed the car has no heat idling. Added 1/2 gal of coolant and heat is back. I don't see any visible leaks. Oil was low but looks ok. No smoke. Idles real good for a 4 cyl. Are these 2.5's known for HG?


Not sure about the head gasket, but I'm pretty sure that year of 2.5 was known for the catalytic converter falling apart inside and getting all the bits sucked into the engine. This in turn causes a good bit of oil usage. I would have thought most of these would have been scrapped by now...


'17 VW GTI 2.0T - 6MT - 18K - Edge 0w40
'15 Camry SE - 2.5 - 25K - PP 0w20
'09 Tacoma TRD Offroad 4x4 - 4.0 - 135K - Edge 0w40
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5247973 10/23/19 10:59 AM
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Looks like 05 was the worse than an 06. Has a few recalls that may need taken care of by the dealer. Should be free so even better.

https://www.carcomplaints.com/Nissan/Altima/

The trans going seems to be the biggest issue. So maybe some drain and fills every week or so.

Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5247994 10/23/19 11:25 AM
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SirTanon Offline
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Is this the Altima you just bought for $500? If so, doesn't seem like the worst purchase. As others have stated, the issue with that is the Cat(s). If it doesn't look like it's been replaced, it might be worth doing so as a preemptive measure. Only a couple-few hundred $.


2013 Nissan Altima SV - 2.5 liter/CVT - 123,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 69,000mi
2010 Ford Fusion - 274k mi - SOLD
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5249190 10/24/19 04:55 PM
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LeakySeals Offline OP
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Yes this is the $500 car. I cleaned the engine bay. Took the car for a 1 hr drive. Exercised the AC. Hit the brakes a few times. Came back and took pics.

[Linked Image]

The hose/banjo connector in this pic was suspect.
[Linked Image]

And so was the AC high pressure hose. Looked like it from initial pics. But nothing, stayed clean [Linked Image]

And then I found this. Assuming this is a hack. The other end of the PS hose? I can't see where it goes. Its wet. Directly under the serp area. I wonder if that gets sprayed around because its so close to the serp, and nothing is wrong with the high pressure AC hose.
[Linked Image]

Thoughts?


06 Escalade 6.0L LQ9 AWD 170k M1 5w30
03 Maxima 3.5L 170k Maxlife HM 10w30
05 Malibu Classic 2.2 111k M1 5w30
06 Altima 2.5L 167k unk
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5252068 10/28/19 10:40 AM
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SirTanon Offline
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Yeah, that definitely looks like a hack job. Hose looks like it's been cut.. and two screw-down clamps put on like that?

Also, and maybe it's just my imagination, but that white spot at the bottom of the hose in that pic.. is that 'wet'?


2013 Nissan Altima SV - 2.5 liter/CVT - 123,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 69,000mi
2010 Ford Fusion - 274k mi - SOLD
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5263892 11/11/19 07:22 AM
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LeakySeals Offline OP
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So I ordered the OEM Nissan section of hose that is supposed go there. But it's just too stiff to push on. Theres nothing to push against so I got about halfway and it's stuck. Everything bending. I tried silicone lube, grease, sprays, no way I'm pushing it on that tube without taking the entire cooler line off the car. Which is a bunch more work because of the location.

I have a section of bulk gas line hose from AutoZone left over from another job. It's pretty stiff too but gives just enough to push it on. Can I use that and see what happens?


06 Escalade 6.0L LQ9 AWD 170k M1 5w30
03 Maxima 3.5L 170k Maxlife HM 10w30
05 Malibu Classic 2.2 111k M1 5w30
06 Altima 2.5L 167k unk
Re: 2006 Altima 2.5 oil leak [Re: LeakySeals] #5265018 11/12/19 12:50 PM
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Fifth87 Offline
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Is the bulk hose rated for fuel injection? It should be stamped on it.
That I believe would be a safe choice vs non FI rated hose which has a lower burst strength.


87 Chevy Caprice wagon 109K ST 10W-40/ACDelco filter

95 Oldsmobile Cutlass Ciera 80K ST 5W-30/ACDelco filter

09 Dodge Caliber SXT 68K Castrol 5W-20/WIX filter
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