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V8 Balance Shaft

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).
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bmdubya1198
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Re: V8 Balance Shaft

Post by bmdubya1198 » Fri Jun 14, 2019 8:53 pm

Roger_850T wrote:
Fri Jun 14, 2019 8:40 pm
How's the timing cover gasket? If you're going that far, you might as well do the timing cover as well, including the front crankshaft seal.

What year is your mom's V8? 2005 was the bad year for the balance shaft bearing, and supposed to be fixed 2006 and later. But if you're in there that far, it's worth at least planning to shine a light down at the back of the bearing and inspecting. Having done it once, I'm a little cynical about the back bearing lasting "forever", although people don't complain about it, so maybe it does. But I'd at least look. If your mom's engine IS a 2005, you should seriously consider "drilling the hole" if you're in there that far.

Feel free to ping me if you have specific questions. Email is best, as sometimes it's intermittent when I'm online.

Roger
It's a 2007, so it's the "improved design". I have to dig a little deeper to get a good view on the leak, I haven't totally pinpointed it yet. There's definitely a good bit of oil leaking, though, and it definitely looks like it's coming from around the timing cover. Particularly on the back side of it, closer to the firewall.
I'm going to take a closer look tomorrow, I'll be under there anyway to replace the tie rods and control arms.

I plan on replacing the front crank seal for sure though. I'm kind of hoping that's the only leak, but I doubt I'll get that lucky!


2000 V70R Venetian Red/Charcoal M56 Swapped 190k
2003 S60 2.4T Silver/Black 107k
2000 S70 GLT Mystic Silver/Taupe 2??k
2007 XC90 V8 AWD Sport Titanium Grey/Black 158k
1993 944 Base Beige/Beige 221k
1992 Miata Mariner Blue/Black 146k
Sold-
1998 V70 GLT Black/Beige 193k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k- Never should have sold it


Need used parts? PM me!

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Roger_850T
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Re: V8 Balance Shaft

Post by Roger_850T » Fri Jun 14, 2019 9:01 pm

Here's a note on sealing compound.

The Volvo manual indicates to use p/n 30757050 "Engine Sealing Compound" to seal a couple of spots on the timing chain cover. I couldn't find it anywhere. It's no longer available from Volvo.

FCP carries a product by Wurth, product 08933211, which I bought and used. It's a large container, 200ml, which was much more than what I needed. That product, for $60+, is probably enough to do 10 of these timing covers, if not more. Still, I was very happy that FCP had it!

After further cross referencing... The Wurth container indicates it meets the manufacturers spec for:
GM: 1052751, 1052917
Ford: D6AZ-19562-B
Chrysler: 4318025
Fiat: 9.55720/B

Somewhere along the way (sorry I wish I had the reference), I've also seen it crossed to Permatex RTV Ultra Black. I also bought a tube of this.

If I have to do this again, I think I will probably just get a tube of the Permatex RTV Ultra Black, and use it anywhere the Volvo Engine Sealing Compound is recommended. It seems to be similar and/or equivalent, and it's much more available (and much more affordable) for the same recommended application.

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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Roger_850T
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Re: V8 Balance Shaft

Post by Roger_850T » Fri Jun 14, 2019 9:07 pm

bmdubya1198 wrote:
Fri Jun 14, 2019 8:53 pm

It's a 2007, so it's the "improved design". I have to dig a little deeper to get a good view on the leak, I haven't totally pinpointed it yet. There's definitely a good bit of oil leaking, though, and it definitely looks like it's coming from around the timing cover. Particularly on the back side of it, closer to the firewall.
I'm going to take a closer look tomorrow, I'll be under there anyway to replace the tie rods and control arms.

I plan on replacing the front crank seal for sure though. I'm kind of hoping that's the only leak, but I doubt I'll get that lucky!
The valve cover gaskets and the timing cover gaskets are made of the same material, which is a soft pliable rubber when new, and over time becomes hard and brittle, and subsequently fails to seal the oil in. The timing cover has the same thing, and with heat and age, it's in the same condition as the timing cover gaskets. I highly recommend that you do the timing cover when you do the valve covers. It's only a little more work, but if you don't do them, I think they will start leaking pretty soon, and you'll be back in there to fix them soon.

If you don't have to do the balance shaft, you can skip the whole "pull the head off" part. :)

With that much taken out, the water pump took about 10 minutes to do. (I already had all the coolant drained off.) I recommend it prophylactically.

Also, plan to do the PCV valve/hose, plus a rubber hose that goes between the two valve covers. They'll be hard and brittle, and really warrant replacing, as you'll need to take them off anyway. (Might as well put a new part back.)

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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bmdubya1198
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bmdubya1198

Re: V8 Balance Shaft

Post by bmdubya1198 » Fri Jun 14, 2019 10:44 pm

FCP carries a kit that includes pretty much anything and everything you would need for the timing cover gasket job, including the sealant and PCV hoses. I might get that kit, but I don’t know about spending $65 on the Wurth sealant. Great tips though, I’ll probably change the water pump too.
Like I told my mom, I wouldn’t mind putting the time and money into this car at all... it’s in great shape and it’ll last a long time. Her last car was a 2013 Hyundai Elantra, which was a great car overall, but it was just shy of 100k miles and I would never want to own a Hyundai out of warranty. The engine was replaced at 80k under warranty due to failing rod bearings, so that was enough! A 150k mile V8 Volvo was a good upgrade!

Funny you mention the sealant though, I was actually curious about sealant choice. I’ll probably use the Permatex Ultra Black if that’s comparable to the Volvo spec. Like you said, it’s much cheaper!


2000 V70R Venetian Red/Charcoal M56 Swapped 190k
2003 S60 2.4T Silver/Black 107k
2000 S70 GLT Mystic Silver/Taupe 2??k
2007 XC90 V8 AWD Sport Titanium Grey/Black 158k
1993 944 Base Beige/Beige 221k
1992 Miata Mariner Blue/Black 146k
Sold-
1998 V70 GLT Black/Beige 193k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k- Never should have sold it


Need used parts? PM me!

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Roger_850T
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Re: V8 Balance Shaft

Post by Roger_850T » Sun Jun 23, 2019 8:00 pm

I came across this youtube video that I thought was pertinent, so I thought I'd share it on this thread. This gentleman does a full teardown of the V8. The dialog is in Russian (I think) so I don't have a clue what he's saying, but the visuals and seeing what it all looks like when disassembled would have been useful to have seen prior to starting my balance shaft project.



Cheers!

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...

User avatar
Roger_850T
MVS Moderator
Posts: 250
Joined: Tue Dec 31, 2013 11:55 am
Year and Model: 854T 1995
Location: Frederick MD
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Roger_850T

Re: V8 Balance Shaft

Post by Roger_850T » Sun Jun 23, 2019 8:07 pm

bmdubya1198 wrote:
Fri Jun 14, 2019 10:44 pm
FCP carries a kit that includes pretty much anything and everything you would need for the timing cover gasket job, including the sealant and PCV hoses. I might get that kit, but I don’t know about spending $65 on the Wurth sealant. Great tips though, I’ll probably change the water pump too.
I looked at the FCP kit, and almost bought it. In the end, I decided I wanted "blue box" Volvo parts, not necessarily the ones reported to be oe/oem at FCP, so I bought "blue box" parts elsewhere. I was able to buy well, and the cost difference was not significant. That said, I think you'd do fine with the FCP kit.

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...

User avatar
bmdubya1198
Posts: 3232
Joined: Tue Dec 30, 2014 10:45 am
Year and Model: '98 V70 GLT
Location: Charlotte, NC
Has thanked: 28 times
Been thanked: 92 times
United States of America
bmdubya1198

Re: V8 Balance Shaft

Post by bmdubya1198 » Mon Jun 24, 2019 8:17 am

I just ordered the contents of the kit the other day, expected to arrive Wednesday. I didn't buy the whole kit since it included the $65 Wurth sealant, and I felt like that money would be better put towards new idlers! I'll use the Permatex Ultimate Black.


2000 V70R Venetian Red/Charcoal M56 Swapped 190k
2003 S60 2.4T Silver/Black 107k
2000 S70 GLT Mystic Silver/Taupe 2??k
2007 XC90 V8 AWD Sport Titanium Grey/Black 158k
1993 944 Base Beige/Beige 221k
1992 Miata Mariner Blue/Black 146k
Sold-
1998 V70 GLT Black/Beige 193k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k- Never should have sold it


Need used parts? PM me!

jimmy57
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Re: V8 Balance Shaft

Post by jimmy57 » Mon Jun 24, 2019 8:28 am

The OE RTV is hard curing and gray. Use the Pernatex 82194 ultra grey rigid.



User avatar
bmdubya1198
Posts: 3232
Joined: Tue Dec 30, 2014 10:45 am
Year and Model: '98 V70 GLT
Location: Charlotte, NC
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bmdubya1198

Re: V8 Balance Shaft

Post by bmdubya1198 » Mon Jun 24, 2019 10:55 am

jimmy57 wrote:
Mon Jun 24, 2019 8:28 am
The OE RTV is hard curing and gray. Use the Pernatex 82194 ultra grey rigid.
Gotcha. That's what I'll use then!


2000 V70R Venetian Red/Charcoal M56 Swapped 190k
2003 S60 2.4T Silver/Black 107k
2000 S70 GLT Mystic Silver/Taupe 2??k
2007 XC90 V8 AWD Sport Titanium Grey/Black 158k
1993 944 Base Beige/Beige 221k
1992 Miata Mariner Blue/Black 146k
Sold-
1998 V70 GLT Black/Beige 193k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green... crushed
2001 S60 2.4T Black/Black 230k
1988 744 Turbo M46 Beige Metallic/Beige 188k- Never should have sold it


Need used parts? PM me!

Cducasse
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Cducasse

Re: V8 Balance Shaft

Post by Cducasse » Wed Jul 31, 2019 6:59 am

Man, I wish I had seen this prior to purchasing my v8 2005 with 59k miles in July 2019. I do love the XC90 and hope engine 7001 doesn’t suffer this defect. Here’s to hoping. Great write up, at least I know if I hear an engine noise, get it towed immediately



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