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> Smell Of Oil Burning While Driving
halewai
post Oct 22 2008, 04:11 AM
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My 94 Volvo 850 Turbo wagon with 280K's appears to have a bit of an oil leak.

I drove the car for about two weeks after purchase while the PCV system was still blocked-up. This caused oil to spew out of the dipstick (as it was the wrong one for my car) which washed all over the front side of the engine bay and seemed to get oil under the plastic plug and wire cover on the top of the crankcase.

My issue right now is that while driving I can smell the smell of oil burning on the manifold and then being blown in the car by the heater.

Upon parking this morning I could smell it fresh in the air and pungent - I lifted the hood to see the smoke from what I presume was oil burning on the exhaust manifold.

I have also noticed that my car is leaving small pools of black oil on the ground after a night of parking.

What I am wondering is whether or not the 2.3L Turbo engine has any well known leaks especially at the back of the block? Is it possible that the oil cap leaks, does the gasket break-down and the cap leak under pressure? Essentially I'm trying to figure out how oil is getting down to the manifold and whether or not the PCV got enough oil on enough stuff that it is still running itself off and out of all of the crevices on the block... but now that it has been more than a week, and more that 110K's I'm thinking that it should have stopped by now.

One thing that should be noted is that my oil is exactly the same level on my dipstick as a week ago. Is there anything else that could be leaking back there? Tranny... I don't know.

Any ideas or advice would be appreciated.

Thanks for looking.

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70 140
post Oct 22 2008, 02:52 PM
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drove it with a plugged up PCV - perhaps the rear main seal is seeping oil?
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halewai
post Oct 22 2008, 04:03 PM
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Yeah I think that the return line for the turbo is shot.. .and I think that RMS is contributing to the leak. Looks like it will be a busy fall.
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ampangbear
post Oct 23 2008, 01:26 AM
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QUOTE(halewai @ Oct 22 2008, 05:11 PM)
My 94 Volvo 850 Turbo wagon with 280K's appears to have a bit of an oil leak.

I drove the car for about two weeks after purchase while the PCV system was still blocked-up. This caused oil to spew out of the dipstick (as it was the wrong one for my car) which washed all over the front side of the engine bay and seemed to get oil under the plastic plug and wire cover on the top of the crankcase.

My issue right now is that while driving I can smell the smell of oil burning on the manifold and then being blown in the car by the heater.

Upon parking this morning I could smell it fresh in the air and pungent - I lifted the hood to see the smoke from what I presume was oil burning on the exhaust manifold.

I have also noticed that my car is leaving small pools of black oil on the ground after a night of parking.

What I am wondering is whether or not the 2.3L Turbo engine has any well known leaks especially at the back of the block? Is it possible that the oil cap leaks, does the gasket break-down and the cap leak under pressure? Essentially I'm trying to figure out how oil is getting down to the manifold and whether or not the PCV got enough oil on enough stuff that it is still running itself off and out of all of the crevices on the block... but now that it has been more than a week, and more that 110K's I'm thinking that it should have stopped by now.
[right][snapback]94476[/snapback][/right]


I would think so too. It couldnt have been smoking out of oil seepages.

QUOTE(halewai @ Oct 22 2008, 05:11 PM)

One thing that should be noted is that my oil is exactly the same level on my dipstick as a week ago. Is there anything else that could be leaking back there? [right][snapback]94476[/snapback][/right]


The leak is probably small, so yes, the rear main seal is probably a good possibility.

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halewai
post Oct 23 2008, 10:53 PM
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Well the good news is that the small leak was from oil running down to the turbo and then down to the ground - the tip off was that the leak was on the far right side of the engine, dripping down over the CV boot, etc.

I'll replace the turbo line, and then clean everything off, and then I'll cross my fingers and hope that I don't have to spend another full day on a project in the first month of owning this car... :57:
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ampangbear
post Oct 23 2008, 11:14 PM
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Good luck, dude.

Let's hope so too.
:)

Cheers.
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halewai
post Oct 26 2008, 07:46 PM
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Problem was solved... the leak is at the stupid oil cap. The gasket has failed and under pressure it slowly seeps oil which drains of the rear right of the motor, down around the dist. cap, down around the RMS too.

Changed the turbo return line o-ring and gasket in order to ensure that wasn't the problem... but all is well now.

No more nasty smell, and no more oil on drive way.
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swedseed850
post Oct 27 2008, 12:53 PM
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care to shot a pic of the line you replaced, or give the part number you used to execute the job?
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halewai
post Oct 27 2008, 08:28 PM
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QUOTE(swedseed850 @ Oct 27 2008, 10:53 AM)
care to shot a pic of the line you replaced, or give the part number you used to execute the job?
[right][snapback]94925[/snapback][/right]



All right here is a link that I referenced to do this job. The line is actually under the exhaust manifold - it is a metal line and it has an O-ring on the block side as well as a gasket on the Turbo side.

Just be sure to let things cool down, the Exhaust get's HOT, and the turbo also get's warm. As well everything will be that much more swelled with the heat. Make sure that you have a decent gasket scraper for removing the gasket at the turbo.

Hope this helps... The link is from Bay 13 - enjoy.

http://volvospeed.com/Repair/turborepairline.php
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swedseed850
post Oct 27 2008, 09:33 PM
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thank you :thumbsup:
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ampangbear
post Oct 27 2008, 10:12 PM
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QUOTE(halewai @ Oct 27 2008, 08:46 AM)
Problem was solved... the leak is at the stupid oil cap.  The gasket has failed and under pressure it slowly seeps oil which drains of the rear right of the motor, down around the dist. cap, down around the RMS too.

Changed the turbo return line o-ring and gasket in order to ensure that wasn't the problem... but all is well now.

No more nasty smell, and no more oil on drive way.
[right][snapback]94875[/snapback][/right]




Err, the gasket or the camshaft oil-seal? I'm referring to the leak at the distributor cap.

Cheers.
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swedseed850
post Oct 27 2008, 10:18 PM
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yeaaaa... matter of fact, the oil cant run from the cap to the distributor, unless alot of oil is pooled up under the wire cover.
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ampangbear
post Oct 28 2008, 01:40 AM
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Sorry for making it a little confusing. THe reason why i asked is because the camshaft oil-seal is more prone to leakages, than the head gasket itself. And since he pinpointed that the oil was at the distributor cap, then normally, its the oi-seal there that gives way (by the way, some say its better to change all four when one of these camshaft oil starts leaking, cos the rest will follow suit...).

But that said, it could still be probable that the engine gasket DID gave way, causing the oil spill. However, my hunch is that if that were to happen, the spills would be HUGE.

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halewai
post Oct 30 2008, 10:17 PM
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There was.. A LOT of oil pooled under the plastic plug cover, it seeped down the rear and over the right side of the engine.

No leaks since... the gasket had actually shrunk by 60%, and it had split.

We actually checked the cam seal, two things... I've got receipts for replacement 9K's - 11months ago.

upon checking, there was no leaking or seeping.
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ampangbear
post Oct 30 2008, 11:22 PM
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OK then.

Thanks for the observation.


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