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2008 XC90 V8 Oil Leak Help (Pictures!)

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
shaneb
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2008 XC90 V8 Oil Leak Help (Pictures!)

Post by shaneb » Sun Dec 30, 2018 7:08 pm

My 2008 XC90 V8 has an oil leak at the front of the engine near the clamp for the coolant hose.
See pictures attached - I have clouded the area I am talking about - looks like valve cover gasket?
My questions
1. Does this indicate the valve cover gasket needs replaced? If not, what may be the culprit?
2. After understanding what the actual leak is coming from (if not likely valve cover) is there anything else I should be doing while I have it apart and are there any tips for completing this you might be able to share?

Thanks
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ggleavitt
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Re: 2008 XC90 V8 Oil Leak Help (Pictures!)

Post by ggleavitt » Mon Dec 31, 2018 2:32 pm

Mileage?

Internet search "volvo b8444s valve cover gasket replacement", pretty much every single V8 will require this job at some point. Gets mighty warm under that hood, heat cycle a few thousand times over 10+ years, flexible things will harden up.

The rear bank starts to leak before the front in my personal experience. As it gets worse, oil may leak onto the alternator and add insult to injury. Full seal kit is sold on FCP, I would add PCV and cross hose plus injector O-rings plus maybe a fuel pressure sensor.

Depending on mileage, you'll probably be wanting to think about the serp belt and all the rotating parts (idler, tensioner) sometime soon if they're still original.

Putting this in perspective, the "extra" cost of ownership with a 5/6-cylinder is knowing you'll need to do a PCV job at some point. For the V8 it's valve covers.


2005 2.5T AWD-198k
2008 V8 AWD Sport-127k

shaneb
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Re: 2008 XC90 V8 Oil Leak Help (Pictures!)

Post by shaneb » Mon Dec 31, 2018 5:39 pm

Thank you
About 160,000 on it

The leak in the front seems to have gotten worse this week, still have to drive 600 miles back home later in the week but will keep it topped up on oil (on holiday)
I will get the kit ordered or at least use as a good reference. There seems to be a lot of “while there do this too” items from what I’ve searched.



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Re: 2008 XC90 V8 Oil Leak Help (Pictures!)

Post by jimmy57 » Mon Dec 31, 2018 6:26 pm

Those rubber VC seals have limited crush applied and they shrink. There are sleeves in the bolts that will not let you snug them down to slow the seepage..



Masscomguru
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Re: 2008 XC90 V8 Oil Leak Help (Pictures!)

Post by Masscomguru » Mon Dec 31, 2018 8:00 pm

There have been a few of these that puked due to elevation changes. Depending on where you traveled may have just finished it in.



shaneb
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shaneb

Re: 2008 XC90 V8 Oil Leak Help (Pictures!)

Post by shaneb » Tue Jul 16, 2019 5:18 pm

Just to offer some closure - I did replace the valve cover gaskets, all associated stuff that comes with the FCEuro kit (but odered OEM parts) as well as sparks and some other gaskets recommended in other threads.
It was a pain, took a long couple of days to get it all back together.

That being said, there is still a slow leak, about a quart every 2+ months...enough to keep a puddle in my driveway. It doesn't appear to be coming from the valve cover gaskets. I am weary its the rear main seal..



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Re: 2008 XC90 V8 Oil Leak Help (Pictures!)

Post by MoVolvos » Wed Jul 17, 2019 12:01 am

shaneb wrote:
Tue Jul 16, 2019 5:18 pm
Just to offer some closure - I did replace the valve cover gaskets, all associated stuff that comes with the FCEuro kit (but odered OEM parts) as well as sparks and some other gaskets recommended in other threads.
It was a pain, took a long couple of days to get it all back together.

That being said, there is still a slow leak, about a quart every 2+ months...enough to keep a puddle in my driveway. It doesn't appear to be coming from the valve cover gaskets. I am weary its the rear main seal..
If it is leaking that much you need to take it to the car wash and have the top and bottom of the engine gently rinsed and then add dye to the system. Could still be coming from your recent work as it did slow the original leak.

I replaced a crushed oil pan while at Acura in 96. Forgot to remove a guide pin of some kind and just deformed the new pan snugging it down. Puddle in the customer's driveway. He was courteous enough to wait a couple of days of leaking as the oil filters on those are upside down and always drains all over the block. There are gullies that the oil flows into and unless it is cleaned very thoroughly there will be oil leaking for a bit on the driveway. You just never know till you do some more diagnosis.


Blessings,

BKM

1998 S70 T5 - Donated
2003 S80 T6
2003 GS300
2003 Odyssey
2008 C30 T5
2019 Atlas SE 4 Motion

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Re: 2008 XC90 V8 Oil Leak Help (Pictures!)

Post by Roger_850T » Thu Jul 18, 2019 6:21 pm

shaneb wrote:
Tue Jul 16, 2019 5:18 pm
Just to offer some closure - I did replace the valve cover gaskets, all associated stuff that comes with the FCEuro kit (but odered OEM parts) as well as sparks and some other gaskets recommended in other threads.
It was a pain, took a long couple of days to get it all back together.

That being said, there is still a slow leak, about a quart every 2+ months...enough to keep a puddle in my driveway. It doesn't appear to be coming from the valve cover gaskets. I am weary its the rear main seal..
If your power steering pump is leaking, it will make it's way down and out, and eventually look like it's coming from the rear main seal. (It comes out of the same weep hole between the engine and transmission.) Clean it up well, then look very closely at the fluid that comes out. It's easier if you didn't just change your oil, as dirty oil makes it easier to tell the difference. Good luck!

Roger


'05 XC90 V8 140k
'95 854T 310k
'02 V70 159k
'03 S80 111k (crashed)
'93 945T 217k (gone to be parted out)
'87 245 300k+ sold, still going
'84 264 Diesel, RIP at 160k
'78 242 manual everything.
'73 P1800ES, fun until the rust set in...

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