Hey all,

81 300SD
I've decided to try to get rid of my blow by problem by starting with the cheap way first. I've heard of people having succeess using Mopar combustion chamber cleaner. Where is the best way to spray it so that it gets to the rings? Is it safe to put it through the turbo?

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1981 Mercedes 300SD - 186k miles

1978 Corvette Pace Car - 21k miles

2006 Mazdaspeed 6 - 56k miles

Pull the injectors and pour in some marvel mystery oil and let it soak for a few days.

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68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i

That's my next step but I wanted to start with this first.

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1981 Mercedes 300SD - 186k miles

1978 Corvette Pace Car - 21k miles

2006 Mazdaspeed 6 - 56k miles

Have you gone through the crankcase ventilation system like they said on the other thread?

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

I do not know if it is safe to inject the Mopar combustion chamber cleaner pre-turbo, but my guess is no.

I have had success with water injection loosening stuck rings.

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Greg
2012 S350 BlueTEC 4Matic
2007 ML 320 CDI
2007 Leisure Travel Serenity
2006 Sprinter 432k
2005 E320 CDI
1998 SLK230 (teal)
1998 SLK230 (silver)
1996 E300D 99k, 30k on WVO
Previous:
1983 240D, on WVO
1982 300D, on WVO
1983 300CD, on WVO
1986 300SDL 237k, 25k on WVO (Deerslayer)
1991 350SDL 249k, 56k on WVO - Retired to a car spa in Phoenix
1983 380 SEC w/603 diesel, 8k on WVO
1996 E300D 351k, 177k on WVO

I would not introduce flammables pre turbo if you can help it....

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold

The Marvel Mystery Oil takes a Week of more to work as it is very gentle.

The Marvel Mystery Oil un-stuck up My sticking Piston Rings on My Volvo Diesel but did not do anything for the Blow-by on My 84 300D. Meaning that the MM Oil is only going to work it the Rings are sticky.

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84 300D, 82 Volvo 244Gl Diesel

See post #4
http://www.peachparts.com/shopforum/diesel-discussion/358890-617-running-poorly.html#post3375520

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84 300D, 82 Volvo 244Gl Diesel

Thanks for the replies. I will try those suggestions. I'm confused as to how putting it through the crankcase ventilation system would help... Doesn't that just go straight to the oil separator which then goes into the oil pan?

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1981 Mercedes 300SD - 186k miles

1978 Corvette Pace Car - 21k miles

2006 Mazdaspeed 6 - 56k miles

Yes, I believe you are.
I think that he meant that you should inspect your CCV system to make sure that it is functioning correctly. Not that you should introduce MMO in to it.

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Greg
2012 S350 BlueTEC 4Matic
2007 ML 320 CDI
2007 Leisure Travel Serenity
2006 Sprinter 432k
2005 E320 CDI
1998 SLK230 (teal)
1998 SLK230 (silver)
1996 E300D 99k, 30k on WVO
Previous:
1983 240D, on WVO
1982 300D, on WVO
1983 300CD, on WVO
1986 300SDL 237k, 25k on WVO (Deerslayer)
1991 350SDL 249k, 56k on WVO - Retired to a car spa in Phoenix
1983 380 SEC w/603 diesel, 8k on WVO
1996 E300D 351k, 177k on WVO

First you are assuming your blowby is caused by stuck rings.... as compared to WORN out rings...
You could get closer to determining your situation by pulling the precombustion chambers... which are the best place to pour the MM oil ..
but pulling them would give you the chance to put a scope into your cylinder and turn the engine... you would be looking for hatch marks still present in the sleeve and for vertical scratches in the bore... possibly indicating one or more broken rings..
You need to consult a FSM.... as they have detailed info as to how to ' read' the oil lines in the bore.... they are very specific and helpful.
If your hatch marks ( crosshatch lines left from boring to size ) are missing... your sleeve is worn out and needs replacing. This is different from old American engines where the crosshatching was designed to wear the rings fast for breaking in the engine...and providing oil spaces to keep the new rough rings and piston from scoring the bore.

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

Bingo!

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

My .02 cents worth; I had blowby on my car & used Kreen. It cured it, NO blowby and the engine runs lot better. I was told to put a quart 500 miles before oil change. It is amazing stuff!!

Engine Cleaners

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06 MB E320 CDI 123k miles
14 Sienna (wife's DD) 36k miles
11 GL350 Bluetec 136k (Sold)
96 E300; 292k+ miles (Donated)
11 Sprinter 22K+ miles (Sold)

What problem in the Engine do you think it fixed?

Also I don't know if this is the same product or not but there is a similar Product that can't be sold in CA.

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84 300D, 82 Volvo 244Gl Diesel

I had blowby & injector(s) knock. I no long have blowby or knock. You won't believe how much crud came out of the crankcase. I plan on repeating it on my next oil change.

The site KANO LAB says can't ship to CA, however I have seen posts that say; order it on line and they will ship.

__________________
06 MB E320 CDI 123k miles
14 Sienna (wife's DD) 36k miles
11 GL350 Bluetec 136k (Sold)
96 E300; 292k+ miles (Donated)
11 Sprinter 22K+ miles (Sold)