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#1
06-01-2011, 03:02 PM
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What do you all think of this blow by?
video below!
http://www.youtube.com/watch?v=pTi9m9rNJLE How I got to this point  http://www.peachparts.com/shopforum/showthread.php?t=299271 
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#2
06-01-2011, 03:19 PM
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Looks to be a bit less than mine.
__________________
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.
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#3
06-01-2011, 03:58 PM
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It doesn't look as bad as the blow-by on my 1975 W115 300D. FWIW.
http://www.peachparts.com/shopforum/showthread.php?t=299393&highlight=Thar+blows
__________________
 [SIGPIC]Tom SE Connecticut 1975 W115 300D visit my blog: http://mercedesdieselrebuildingdiederich.blogspot.com/
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#4
06-01-2011, 05:26 PM
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Not even worthy of the name.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#5
06-01-2011, 07:34 PM
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Mine is a tad worse, don't worry about it.
__________________
TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth
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#6
06-01-2011, 08:20 PM
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looks good. My SD is a tad less, but this is not bad at all. My other SD blew the cap off after loosening
 . Investigation found piston blown in #3 pot from a jug-head (PO) using ether 
__________________
Thanks, Mark in NC "Spark plugs?...We don't need no stinking spark plugs!" 1985 300SD "Der Silberne Schlitten" 420,000 mi Wish these were diesel: 2003 Ford Club Wagon 130,000 mi
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#7
06-01-2011, 08:31 PM
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Its not worth worrying about. If you had any less, it would be sucking air in!!!!
 When you smoke out your garage if you take the oil filler cap off, then you worry. If it was puffing out like a steam train & the compression was low, then its getting bad. Does it use much oil?
__________________
Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort.... 1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles  1987 250td 160k miles English import  2001 jeep turbo diesel 130k miles  1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving
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#8
06-02-2011, 12:27 AM
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There is too much discussion here that makes it sound like blowby is the kiss of death. If you haven't got a geyser worthy of Yellowstone going, don't sweat it....
__________________
 Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
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#9
06-02-2011, 06:02 AM
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Blowby isn't bad until it pushes oil out the dipstick tube. I had a 351W that did this and I still drove it for over a year that way.
__________________
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.
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#10
06-02-2011, 09:41 AM
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I did not think it looked that bad. But I do have low compression in 2 cylinder after a WOT episode (read link in first post). My prelim data points to valves and I think the blow by also supports this.
Next step is a leak down then decide on a head redo or long block
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#11
06-02-2011, 09:54 AM
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Quote:
The high idle governor was controlling the motor at max revs. In a runaway, oil/vapor fuels the motor in an uncontrolled manner. Have you adjusted the valves recently? I would drive the car for 5k miles before doing much apart from adjusting the valves unless there was a problem before your WOT event.
__________________
Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort.... 1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles 1987 250td 160k miles English import 2001 jeep turbo diesel 130k miles 1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving
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#13
06-02-2011, 05:09 PM
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Quote:
8000 rpm plus and would have melted down in 1-2 more minutes, this is no joke and not to be treated lightly. It scared the crap out of me and a few other poor soles who have poorly installed a shutoff valve. First step was to adjust valves and they were all way off, prior adjustment was done 3 months ago. So the runaway threw them out for sure. After running it for a while the compresion test was done, you can read the links in the first post for results. BTW compression is messed up. But read the links in the first post and you will be up to date.
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