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Blue smoke out tail pipe when rev'd

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
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FastYellow
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FastYellow

Blue smoke out tail pipe when rev'd

Post by FastYellow » Mon Feb 01, 2016 3:22 pm

Ok. My T5R has developed a slight puff of blue smoke when the car has been idling for 5-10 mins and revs are given. I suspect turbo seals, car has 220k and has PCV system serviced at 200k. Turbo holds boost, no check engine light. Compression is 155 warmed psi across the board except cyl #2 145.
I'm using Castrol 10w40 conventional oil.
Where do i start looking?

difflock54
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difflock54

Re: Blue smoke out tail pipe when rev'd

Post by difflock54 » Mon Feb 01, 2016 5:27 pm

If the blue smoke is minimal and only occurring after periods of stationary idle, I would not be worrying about it personally.
It could perhaps be down to the valve stem seals ???
The cylinder compressions are reasonable for the motors mileage and consistent. The lower one is only 10psi out which is not out of the norm.
Have you noticed that your using excessive oil between changes?
Maybe try a semi-synthetic oil and note any change?

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rspi
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rspi

Re: Blue smoke out tail pipe when rev'd

Post by rspi » Mon Feb 01, 2016 6:51 pm

Valve stem seals or turbo. You should ONLY use full synthetic oil with a turbo car. Also, the owners manual suggest that you should NOT allow these cars to idle. They will smoke.

If it's the turbo, it will get worse pretty fast. If it's the valve stem seals, it may not get worse anytime soon.
'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
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erikv11
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erikv11

Re: Blue smoke out tail pipe when rev'd

Post by erikv11 » Mon Feb 01, 2016 8:28 pm

Valve stem seals.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 285k
'06 S60 R, 165k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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Clemens
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Clemens

Re: Blue smoke out tail pipe when rev'd

Post by Clemens » Tue Feb 02, 2016 2:23 am

Switch to full synth oil, I run Mobil 1 0W-40, but I remeber in the states M1 is rather 0W-30. This will Keep the turbo in good shape, especially in the SoCal heat.

My guess would be valve stem seals. On my 854 NA I´ve had bad valve stem seals ever since I bought it from the first owner 5 years and 60.000 miles ago. It burns some oil, but as Long as I can refill i´´m not messing with that on the grocery getter.
Summer: 1996 855 R
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abscate
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abscate

Re: Blue smoke out tail pipe when rev'd

Post by abscate » Tue Feb 02, 2016 5:00 am

Switch to synthetic per above. Ignore the internet dreck about " your seals will start leaking"
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FastYellow
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FastYellow

Re: Blue smoke out tail pipe when rev'd

Post by FastYellow » Tue Feb 02, 2016 9:18 am

Ok. Thanks for all your advice. I will switch to synthetic and see how she does. I did find oil residue on my turbo inlet tube. I'll try to check the turbo inlet for play
If I have to replace my 15g turbo I'd like to change to a 16 since I don't wanna mess with ECU tuning yet.
I know the T5R has a conical flange . what do I need to install a 16g to my T5R.
Thanks for the advice

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abscate
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abscate

Re: Blue smoke out tail pipe when rev'd

Post by abscate » Tue Feb 02, 2016 9:32 am

If it was residue that wiped up with a paper towel, thats normal. Leave it alone and happy driving.

Take a peek in the Performance Forum down below for hints on that turbo swap
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erikv11
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erikv11

Re: Blue smoke out tail pipe when rev'd

Post by erikv11 » Tue Feb 02, 2016 9:47 am

You would just keep the exhaust housing from your 15g, use it on whatever turbo you put in. All you need is a turbo, with or without exhaust housing, just use the part you need (the turbo body).

I haven't seen compelling arguments to go to the 16g, everyone says the low end spools up like a dog compared to the 15g. But I have never driven one ...
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 285k
'06 S60 R, 165k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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bmdubya1198
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bmdubya1198

Re: Blue smoke out tail pipe when rev'd

Post by bmdubya1198 » Tue Feb 02, 2016 10:50 am

Yes, from what I've heard, you only need to replace the compressor housing, really. You can keep the exhaust side on the manifold.
My cousin has an S70 T5, and the 16t isn't the best in the low end, at least with the automatic. It isn't until you're moving and get up to 2500-3000 RPM that you really feel it. Then, it's a rocket!
Can't compare it to the 15g because I've never driven a 15g.
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2000 S70 GLT Mystic Silver/Taupe 253k
2003 S60 2.4T Silver/Black 109k
2007 XC90 V8 AWD Sport Titanium Grey/Black 165k
1993 944 Base Beige/Beige 221k
1991 944 Turbo Dark Green/Beige 172k
1992 245 Base White/Beige 249k
Sold-
1998 V70 GLT Black/Beige 199k
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

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