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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
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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henrysin44
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Year and Model: 1994 Volvo 855 Turbo
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henrysin44

Re: Volvo 855T clouds of blue smoke :(

Post by henrysin44 » Fri Nov 17, 2017 11:16 am

I was running out of ideas for the cause of the smoke so knowing a clogged PTC can cause blue smoke I took it out to clean but the thing was spotless and clear inside, so I pulled a PTC from one of my parts cars and put it in my 855 and the smoke was no more.
So those numbers are ay-ok? I thought dry compression should be in the 150 range? The engine has about 260K on it.
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 » Fri Nov 17, 2017 1:38 pm

FYI the PTC doesn't mechanically do anything, it is just a hole. If it is spotless, it is working. The plug on the PTC is a for a heating element (the copper plate) that helps to keep it spotless.

The compression numbers I wouldn't trust that every cylinder is badly worn, especially given the the numbers are apparently tightly grouped. But again it is hard to comment in any detail without seeing some actual numbers.
'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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rspi
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rspi

Re: Volvo 855T clouds of blue smoke :(

Post by rspi » Sat Nov 18, 2017 9:52 am

Did you do the compression test with the engine hot?
'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

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henrysin44
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henrysin44

Re: Volvo 855T clouds of blue smoke :(

Post by henrysin44 » Tue Nov 28, 2017 11:14 am

rspi wrote:
Sat Nov 18, 2017 9:52 am
Did you do the compression test with the engine hot?
The engine temperature was in-between cold and operating temp. I might do another test tomorrow to get exact numbers.
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
Posts: 118
Joined: Sun Apr 12, 2015 4:14 pm
Year and Model: 1994 Volvo 855 Turbo
Location: Guilford, CT USA
Has thanked: 2 times
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henrysin44

Re: Volvo 855T clouds of blue smoke :(

Post by henrysin44 » Tue Dec 05, 2017 9:23 am

I found the actual compression numbers i wrote down.
Dry:
#1: 115, #2: 120, #3: 117, #4: 119, #5: 120.
Wet:
#1: 175, #2: 180, #3: 181, #4: 180, #5: 182.

Another thing i failed to mention is the exaust has a skip in tone every 3 sec at idle, its 'straight piped' as in no cat and the pipe stops halfway through the car (thanks New Haven pot holes LOL). almost seems like a miss as you can feel it through the idle vibration. Plugs, wires, cap, and injectors are new. Nit-picky i know but im trying to get this wagon into tip-top shape for ECU reprogramming.

P.S only trouble code set on the OBD I port is rear 02 because i have no rear 02.
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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rspi
Posts: 7278
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United States of America
rspi

Re: Volvo 855T clouds of blue smoke :(

Post by rspi » Tue Dec 05, 2017 10:28 am

I would think the engine is worn pretty bad. I would be trying to milk it or prepare to replace it, not tune it. :/
'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

scot850
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scot850

Re: Volvo 855T clouds of blue smoke :(

Post by scot850 » Tue Dec 05, 2017 3:34 pm

The wet values would tend to highlight either rings are stuck, or the engine piston rings are really worn. Good news would be it looks like the valves are good.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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