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Considering a Volvo - "Lower Gasket Leak with smoke"?

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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mtd240
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Year and Model: 2007 XC70
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Considering a Volvo - "Lower Gasket Leak with smoke"?

Post by mtd240 »

It's been awhile since I posted here (been awhile since I owned a "newer" Volvo :P). Looking at picking up another '98 XC. Guy says the engine is "blown", according to his mechanic (who apparently knows a lot about Volvos). Car starts and runs, then starts smoking a lot after a little driving, through the cabin even. (it's not the heater core)

The mechanic told him it is a "lower gasket" that would require pulling the engine to replace. I am having a hard time believing that..it's been over a year since I last worked on one of these, but memory tells me there aren't any "lower gaskets that require engine removal". Seals maybe - rear main - but no gaskets. It was hard to figure out what was wrong, but my best guess is that something is leaking onto the exhaust and burning off.

Now the question - is the oil pan gasket right above the exhaust? I can't remember. A better guess would probably be a seal (or two [or three]) leaking oil onto the turbo - cam, oil cap, or even a turbo seal of some sort (don't remember much of what's back there). Clogged up PCV. Car probably just needs a little attention at 175k miles.

Anyway - opinions?
2007 XC70, white/oak, 175k miles
2008 XC70 3.2L, 115k miles
2016 XC60, osmium grey / off-black, 95k miles
Gone:
1990 240 DL Wagon, M47, lots of goodies. 372,000 miles
1978 242, lots and lots of work to get a reliable daily
1998 V70 XC, Almost done replacing everything, then I sold it :lol:
1996 850 NA, victim of sporadic tree falling. Protected the wife. RIP Volvo

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FLXC90
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Post by FLXC90 »

You recall correctly, the engine stack only has one "gasket", the head gasket. The other layers are sealed with anaerobic sealant. Also, there is nothing above the exhaust that would leak oil. Most likely would be turbo seals or O-rings on lube lines to/from turbo. How fast does it consume oil? Does it start immediately and run smooth?
Rear main would cause a drip or puddle on the floor, not a cloud. Rear cam seals might allow oil to get blown to the exhaust?!

Run a compression check and block-check the motor for basic peace of mind, then go crazy fixing every little thing on it!
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)

scot850
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Post by scot850 »

Could be the PCV is blocked and forcing oil into the top of the head and then it eventually works its way out the back top cover and drains down the back of the engine. May explain why it takes a while to start as it needs time to build pressure after starting. Other suggestions from FLX90 also stand. Even the oil filler cap seal leaking for a long time can do this.

Neil.
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

mtd240
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Post by mtd240 »

Thanks for the replies guys. So, probably PCV or turbo. Actually, probably both, after 175,000 miles.

I can't really ask the guy too many more questions - I think I asked too many up front ha! I'll try to figure out if it runs smooth - I doubt he knows how fast oil is disappearing (he doesn't even know if oil is disappearing). I'll go take a look at the car, and check PCV pressure and do a compression test. Perhaps make sure the driveshaft is still in, too..

He only wants $400 for it - so if the body and interior are in good shape, and it doesn't have major rod knock, I'll probably pick it up.
2007 XC70, white/oak, 175k miles
2008 XC70 3.2L, 115k miles
2016 XC60, osmium grey / off-black, 95k miles
Gone:
1990 240 DL Wagon, M47, lots of goodies. 372,000 miles
1978 242, lots and lots of work to get a reliable daily
1998 V70 XC, Almost done replacing everything, then I sold it :lol:
1996 850 NA, victim of sporadic tree falling. Protected the wife. RIP Volvo

mtd240
Posts: 326
Joined: 7 December 2011
Year and Model: 2007 XC70
Location: Ellicott City, MD
Has thanked: 23 times
Been thanked: 7 times

Post by mtd240 »

Sorry to post multiple times.

I asked the seller if it ran smoothly. He said yes, until it starts to overheat, hiss, and idle sporadically :lol:. I just can't figure this guy out. Anyway, I'm guessing headgasket now, for sure. Still worth the $400 though, I think.
2007 XC70, white/oak, 175k miles
2008 XC70 3.2L, 115k miles
2016 XC60, osmium grey / off-black, 95k miles
Gone:
1990 240 DL Wagon, M47, lots of goodies. 372,000 miles
1978 242, lots and lots of work to get a reliable daily
1998 V70 XC, Almost done replacing everything, then I sold it :lol:
1996 850 NA, victim of sporadic tree falling. Protected the wife. RIP Volvo

bugs11
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Year and Model: 850 1996
Location: Iowa

Post by bugs11 »

Check for exhaust gases in coolant.

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abscate  
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Post by abscate »

mtd240 wrote:Sorry to post multiple times.

I asked the seller if it ran smoothly. He said yes, until it starts to overheat, hiss, and idle sporadically :lol:. I just can't figure this guy out. Anyway, I'm guessing headgasket now, for sure. Still worth the $400 though, I think.
As a parts car. For the cost of getting a daily runner, I would look elsewhere.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread

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FLXC90
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Post by FLXC90 »

Block-chek, available at NAPA, or "rentable" at auto parts stores, checks coolant overflow tank for exhaust gas. Sounds like this car has a breached gasket.

If it is immaculate (for a 15-20 year-old car), then maybe find a crashed good runner to harvest a motor from, or just keep looking.

Is it a car, a hobby, or an addiction? :D
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)

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erikv11
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Post by erikv11 »

FLXC90 wrote: ... Is it a car, a hobby, or an addiction? :D
Almost unanswerable!! :lol:

OP you have experience with AWD so I defer to you but I think I wouldn't go for an engine pull on one of those, I would save my efforts for a nice T5.
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6 :shock: 153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

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