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Volvo 855T clouds of blue smoke :(

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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henrysin44
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henrysin44

Volvo 855T clouds of blue smoke :(

Post by henrysin44 » Wed Aug 30, 2017 7:45 am

Hey all been a few weeks sense my manual swap and im experiencing a smoking problem. Ever sense the swap the car will puff blue smoke at idle or stopped after warming up, also smokes when letting off the gas. I did replace the PCV system during the swap and am leaning towards wrong routing or clogged areas in the PCV system because when i remove the valve cover hose smoke pours out of the hose and not the valve cover. But smoke clouds when letting off the gas seems like a failing turbo (on my second used turbo). Although the engine seems as strong as ever, even abit faster, no knocks, pings, tics, or missing so im not jumping to internal engine damage yet but any suggestions are appreciated!
http://shealabs.net
Daily driver Black 1994 Volvo 855 2.3L Turbo - manual swapped, turbo swapped, green injectors, custom M4.4 Tune, de-catted, custom two-tone interior, V70R seats & rims
Teal 1994 Volvo 855 2.5L N/A Manual Transmission (the back up daily and parts car) - Runs and Drives but the engine knocks
Silver 1997 Honda CRV 2.0 AWD - its in a very sorry condition, but drives
Silver 2003 Subaru Forester 2.5L N/A AWD - Leaks everything

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bmdubya1198
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bmdubya1198

Re: Volvo 855T clouds of blue smoke :(

Post by bmdubya1198 » Wed Aug 30, 2017 8:39 am

The typical cause of blue smoke on these cars is valve stem seal failure, although I don't know if you're supposed to be getting smoke out of the PCV hose to the valve cover. I think that hose is supposed to go IN to the oil trap.
Make sure your routing is correct: viewtopic.php?t=28487
Any shaft play in the turbo? Notice a lot of oil in the intercooler hoses?
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
2006 BMW 330i
1999 BMW 528i
Sold-
2000 S70 GLT Mystic Silver/Taupe 253k
1993 944 Base Beige/Beige 221k
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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FLXC90
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Re: Volvo 855T clouds of blue smoke :(

Post by FLXC90 » Fri Sep 01, 2017 5:54 pm

start with a glove test, see if ya goofed! We ALL miss things from time to time
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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henrysin44
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henrysin44

Re: Volvo 855T clouds of blue smoke :(

Post by henrysin44 » Sat Sep 02, 2017 10:02 am

I checked the routing and its correct but smoke still pours out of the hoses so I got some mini cone filters to vent the engine to the atmosphere to avoid plumes of blue smoke out my tailpipe until I can have time to track down the problem (just started college and commute daily). So far no blue smoke or burnt oil smell BUT yesterday when late to class I floored it in 4th and when I went into 5th at 95-100mph a HUGE cloud of gray smoke trailed behind me and the cabin filled with the smell of burnt oil and rich gas oder. It was like dense fog, I feel like an ass but I do wish I had a picture! Going to check turbo shaft play as @bmdubya1198 said and might do a compression test as the engine has close to 300K on it even though it runs and sounds very healthy.
http://shealabs.net
Daily driver Black 1994 Volvo 855 2.3L Turbo - manual swapped, turbo swapped, green injectors, custom M4.4 Tune, de-catted, custom two-tone interior, V70R seats & rims
Teal 1994 Volvo 855 2.5L N/A Manual Transmission (the back up daily and parts car) - Runs and Drives but the engine knocks
Silver 1997 Honda CRV 2.0 AWD - its in a very sorry condition, but drives
Silver 2003 Subaru Forester 2.5L N/A AWD - Leaks everything

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henrysin44
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henrysin44

Re: Volvo 855T clouds of blue smoke :(

Post by henrysin44 » Sat Sep 02, 2017 10:23 am

henrysin44 wrote:
Sat Sep 02, 2017 10:02 am
I checked the routing and its correct but smoke still pours out of the hoses so I got some mini cone filters to vent the engine to the atmosphere to avoid plumes of blue smoke out my tailpipe until I can have time to track down the problem (just started college and commute daily). So far no blue smoke or burnt oil smell BUT yesterday when late to class I floored it in 4th and when I went into 5th at 95-100mph a HUGE cloud of gray smoke trailed behind me and the cabin filled with the smell of burnt oil and rich gas oder. It was like dense fog, I feel like an ass but I do wish I had a picture! Going to check turbo shaft play as @bmdubya1198 said and might do a compression test as the engine has close to 300K on it even though it runs and sounds very healthy.
Decided to hook up my scanner and pulled codes for cyl #5 and #3 misfire and random misfire, also codes for o2 bank 1 sensor 2 (only have the pre cat sensor). Thing is it doesn't miss at all very smooth....
http://shealabs.net
Daily driver Black 1994 Volvo 855 2.3L Turbo - manual swapped, turbo swapped, green injectors, custom M4.4 Tune, de-catted, custom two-tone interior, V70R seats & rims
Teal 1994 Volvo 855 2.5L N/A Manual Transmission (the back up daily and parts car) - Runs and Drives but the engine knocks
Silver 1997 Honda CRV 2.0 AWD - its in a very sorry condition, but drives
Silver 2003 Subaru Forester 2.5L N/A AWD - Leaks everything

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bmdubya1198
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bmdubya1198

Re: Volvo 855T clouds of blue smoke :(

Post by bmdubya1198 » Sat Sep 02, 2017 11:19 am

Yeah, if you have random misfires, a compression test couldn't hurt. How old are your ignition parts? Your plugs might be done for...
2000 V70R Venetian Red/Charcoal M56 Swapped 195k
2003 S60 2.4T Silver/Black 112k
2007 XC90 V8 AWD Sport Titanium Grey/Black 166k
1991 944 Turbo Dark Green/Beige 173k
1992 245 Base White/Beige 249k
2006 BMW 330i
1999 BMW 528i
Sold-
2000 S70 GLT Mystic Silver/Taupe 253k
1993 944 Base Beige/Beige 221k
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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erikv11
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erikv11

Re: Volvo 855T clouds of blue smoke :(

Post by erikv11 » Sat Sep 02, 2017 11:47 am

How is it on the glove test?
'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, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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tryingbe

Re: Volvo 855T clouds of blue smoke :(

Post by tryingbe » Sun Sep 03, 2017 6:16 am

85 GLH, 367 whp
00 Insight, 72 mpg

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henrysin44
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henrysin44

Re: Volvo 855T clouds of blue smoke :(

Post by henrysin44 » Wed Nov 15, 2017 5:22 pm

Hey all, been awhile but I got around to testing and fixing during some spare time. So it turns out the blue smoke was caused by a bad PTC, wasn't even dirty! The misfires were due to a bad wire on #1 and a shorted out injector on #5. Car runs great now, power is back, MPG is up, and the engine has that smooth growl back. Except cyl #5's spark plug is always oil fouled, I forget the exact numbers of the compression test I did, but nothing was out of range across cylinders, only across tests.

Dry:
#1: 118-120
#2: 118-120
#3: 118-120
#4: 118-120
#5: 118-120
Wet:
#1: 165-170
#2: 165-170
#3: 165-170
#4: 165-170
#5: 165-170

^ Would these results indicate piston ring wear?

P.S: I do not remember if I had my foot to the floor during the compression tests, I do know that i unplugged the injectors and ignition coil. Also I don't notice a lack of compression, the car pins me back in my seat and can reach 80mph on the on-ramp before even getting on the highway, plus it gets up to 120mph like butter (was late to classes a few time lol).
http://shealabs.net
Daily driver Black 1994 Volvo 855 2.3L Turbo - manual swapped, turbo swapped, green injectors, custom M4.4 Tune, de-catted, custom two-tone interior, V70R seats & rims
Teal 1994 Volvo 855 2.5L N/A Manual Transmission (the back up daily and parts car) - Runs and Drives but the engine knocks
Silver 1997 Honda CRV 2.0 AWD - its in a very sorry condition, but drives
Silver 2003 Subaru Forester 2.5L N/A AWD - Leaks everything

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erikv11
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erikv11

Re: Volvo 855T clouds of blue smoke :(

Post by erikv11 » Wed Nov 15, 2017 9:44 pm

I am curious, what is PTC failure and how did it cause smoking, do you mean the PCV was open at the PTC? What did you do to fix it?

For compression the actual numbers would be better but those look fine. pedal not to the floor is OK, that is to cut fuel.
'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, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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