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Oil leak around turbo

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Oil leak around turbo

Postby dang5001 » 24 Jul 2006, 13:50

I have a 99 S70. I thought the oil return line on the turbo was leaking, but it wasn't the problem. It now looks like the leak is coming from someplace in the area where the fresh air intake enters the turbo. It isn't leaking that much, but I don't want it to become a problem. Could a clogged PCV cause the leak in that area? Any help or suggestions are appreciated.

Thanks in advance.
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Postby pfeener » 24 Jul 2006, 15:25

It's normal for the underside of the turbo to have a little oil on it. If it doesn't leak enough to make a mess or drip on the floor, I wouldn't worry about it.
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Postby dang5001 » 24 Jul 2006, 16:37

It is starting to leave some oil on my garage floor. Not that much. However, if it is a symptom of something bigger, I want to try and fix it.
Thanks for the reply.
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Postby White850Turbo » 24 Jul 2006, 19:30

Pictures would be a great help in diagnosing what the issue may be here.
-Sean

1995 850 Turbo (Extensively Modded)

1998 S70 T5 (Almost Stock)
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Postby dang5001 » 04 Aug 2006, 11:22

It was the flame/oil trap. PCV was clogged. had it replaced and all is fine.
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Postby MadeInJapan » 04 Aug 2006, 15:13

I know you changed out part or all of your pcv system, but check the following too:

There is a bayonnet connector at the lowest end of the air-intake hose (the accordian one) to the turbo. Attached to this is a hose that goes to the oil separator (part of the pcv system) under the intake manifold. If that line or the valve in the bayonnet connector gets clogged up, then the spill over dumps right on top of the turbo and if there's enough, will drip down on the floor. Be careful disconnecting the connector there...it's plastic and you can break it. Once the small hose is off of it, make sure it's not clogged. Use a pipe cleaner with brissles dipped in alcohol to thoroughly ream it out. I had the same problem and had to clean this valve out when changing out my pcv hoses. Maybe you already did this with your pcv maintenance, but I wrote this just in case you didnt' check the valve mentioned above, as it's often over looked.
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
94 850 Sedan NA Drk Blue/Tan
'00 V40 Purple/Grey Mobil-1
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Postby dang5001 » 04 Aug 2006, 15:21

Thanks. I'll check it this evening.
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OIL COMING FROM TURBO AREA

Postby awbooth » 27 Mar 2007, 20:25

I have the same exact leak that has sorrounded the clamp that goes around the air intake hose on my 1999 Volvo V70 XC. I have no visual on reaching the PCV Valve area. The brake cylinder is in my way and I have no way of seeing the bayonnet connector mentioned in someone's response. Thanks for your help. Also, anyone familiar with the viscous coupling problem I have.
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Oil coming from turbo area

Postby driver60 » 19 Apr 2007, 21:00

I have a 98 S70 T5 with 60,000 miles. I am trying to disconnect the "bayonette" connection where the PCV line meets the air inlet to the turbo. I cannot find a position where the plastic piece will pull out. Any suggestions?
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Postby MadeInJapan » 19 Apr 2007, 22:25

Take the entire accordion hose off of the turbo, take it out of the car and then disconnect the bayonet connector. This is the only way that I was able to do it...otherwise, even if you get the connector out, you'll have mega issues trying to reseat it.
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
94 850 Sedan NA Drk Blue/Tan
'00 V40 Purple/Grey Mobil-1
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Postby JFO » 22 Apr 2007, 22:21

I pulled this connector out to check it while I'm waiting for a PCV kit to arrive, and as MIJ suggested it was plugged. The hose clamp on the accordian hose at the turbo is hard to spot and you need good light. Mine was covered in dirt so I needed to get my hand down there to clean it off a bit before I could see it. After removing the various small hoses and connectors the air hose comes out easily. The connector however is heard to pry out and harder to reinsert, so I suggest cleaning it in place. There's a small hole on the bottom that was plugged and the inside of the piece was caked with hard residue that came off easily. There are no moving parts inside and I cleaned it out with throttle body cleaner and a small screwdriver. You can remove any debris that drops into the accordian hose, so there is no advantage to pulling the connector out of the hose.
There is no valve or moving part that I can see in this device. It has an electrical connector and the inside looks like a copper sleeve.
Does anybody known what it does??

Jim
'98 S70 Turbo GLT

280,000 km
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Postby MadeInJapan » 23 Apr 2007, 01:21

Jim,
Glad you got it done without disconnecting the bayonet connector...seems your way was much easier than mine....why I didn't think of that, I don't know....Doh! (Homer Simpson hitting himself in the head while holding a donut). Anyways, glad you got it cleaned out. The copper from what I understand, transfers heat to the little electrical device down there and allows more exhaust into the turbo dependent on temperature (possibly by simply expanding and contracting)....at least that's what I've heard.
'98 S70 T5 Emrld Grn Met/Beige Tons of Upgrades Mobil-1
'04 V70 2.5T Red/Taupe Some Upgrades Mobil-1
94 850 Sedan NA Drk Blue/Tan
'00 V40 Purple/Grey Mobil-1
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Postby JFO » 23 Apr 2007, 02:04

MIJ,

Actually, I took it out and realized later that I didn't need to. It was a fight getting it back in!

Jim
'98 S70 Turbo GLT

280,000 km
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Postby tailor » 13 Nov 2007, 01:22

So after fixing the ododmeter I decided to tackle the pcv.

This is my deal, the bayonet connector on the accordian hose going to the turbo, phew!, was fixed before because it had come loose. Black gasket silicone was used and it has not held up to the task at hand.

As you will see in the pics the inside rubber part is toast (I think due to oil) I asked the dealer if there is a replacement gasket, they say no.
The top part looks ok, if not a little soft.
Looking at it again I can see that the rubber makes a sandwich of the accordian pipe( pipe is the peanut butter) :lol:
The number stamped on the bayonet connector is 1367839 and 3900160977 and >PA6 -GF30< I would think that there must be a part for this somewhere?

I am sure that some of the forum members have experienced a similar situation, does anybody have an idea where I can get the rubber gasket to reinsert the bayonet connector .

Car now in more pieces than I really would like. :cry:
I really do not want to buy a new accordian hose if i can avoid it.


Tailor
1994 850 Auto Turbo wagon 306000km (Sold)
2004 XC90 AWD 188000km

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