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#1
12-02-2007, 03:46 AM
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The cars developed a new, disastrous sound
1987 300D with the OM603 3.0 turbodiesel. 200,000 miles.
Over the past month and a half, the gal when from having an odd "tock" sound every few seconds (not a knock or a tapping valve.. lifter perhaps?), to having a persistant tick. This tick speeds up with engine RPM and is there when the car is hot or cold. I can't tell where it's coming from. I run conventional rotella-t 15w40, did an oil change about 2 weeks ago. I am wondering what could be ticking loudly and what I can do to fix it. The best way I can describe the noise is this.. When we were little, some of us may have did the whole old "card in the bicycle spoke" trick where you take a clothes pin, and clip the playing card to the frame so that when the bike tire moves, it hits the card causing a "tick". It's kind of like that but doesn't sound as cool  Any ideas?
__________________
.:1982 300D "The Ambassador"- R.I.P:. .:1987 300D 3.0 "Häns"- Current Whip:. .:1967 F85 Oldsmobile "Grandpa"- Show And Go:. .:1991 WS6 Firebird Trans-Am "Blackbird"- FOR SALE:. 
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#3
12-02-2007, 04:32 AM
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I hope so, anything else it could be sounds like a lot of money. Could that really happen overnight though?
__________________
.:1982 300D "The Ambassador"- R.I.P:. .:1987 300D 3.0 "Häns"- Current Whip:. .:1967 F85 Oldsmobile "Grandpa"- Show And Go:. .:1991 WS6 Firebird Trans-Am "Blackbird"- FOR SALE:.
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#4
12-02-2007, 06:14 AM
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sure it always happens overnite the hole wasnt there b4
where r u in joisey i'm in lakewood my old tired ears could listen to it or i have a great mechanic in point pleasant
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commercial fisherman diesel in my blood in my boats trucks and Dear old Dad has had me drivin them since i got my first license in 1968 1986 300 SDL 427654 1999 Chevy Crew Cab Dually 225423 1986 300 SDL 287000 Dad's 1987 190 Turbo 158000 Mom's (my inheritance)
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#6
12-02-2007, 10:36 AM
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Quote:
If your very careful, you can take a piece of wooden dowel and place it at various parts of the engine to zero in on the location. (other end in ear) Could be a number of different things. Need to isolate the general area and then the parts in that area will need further discovery. Being that this has been going on for 6 weeks or so and has changed over time tells me the issue is progressing and if it were me I would try not to use it until I knew what it was. Good luck Don
__________________
 1980 300TD-T (82 Turbo and Trans) 159,000 Miles "Jackie-O"1983 300SD 272,000 Miles "Aristotle" 1987 Jeep Wagoneer Limited - keeps the MB's off the ice and out of the snow 1994 BMW 530it
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#7
12-02-2007, 11:12 AM
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Start by listening very closely to the vac pump area. Buying a mechanics stethoscope might be a good idea at this point.
__________________
Jimmy L. '05 Acura TL 6MT  2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China"  Scar engine installed'81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John
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#8
12-02-2007, 11:35 AM
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With a helper, have the helper put it in gear, and give it some throttle. With you standing beside the car, listen to the sound. If it gets LOUDER as well as faster, it is exhaust or heat-shield related. If not, likely lifter. An internal knock is different, unusual in anything other than the 3.5L, but always possible.
If it comes and goes with RPM, it is likely something loose rattling (the aforementioned injector line for example) and it's going to rattle loudest at its resonant frequency.
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 Gone to the dark side - Jeff
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#9
12-02-2007, 12:11 PM
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it could be quite a few things.. it could be an injector nailing or valvetrain noise an exhaust leak ( im leaning twards an exhaust leak just because it feels right)
__________________
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? As long as they would add one additional commandment for you to keep thy religion to thyself. George Carlin (Wonder where he is now..) 1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won. pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.
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#10
12-02-2007, 12:14 PM
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Does this engine have a belt tensioner?
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#11
12-02-2007, 12:57 PM
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Quote:
__________________
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? As long as they would add one additional commandment for you to keep thy religion to thyself. George Carlin (Wonder where he is now..) 1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won. pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.
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#12
12-02-2007, 01:20 PM
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similiar situation
My 300SDL had developed a new sound recently.....seems to be coming from either the belt tensioner or the very FRONT cylinder; I haven't tried any of the "listening closely" methods yet. After I fix the fuel leak, I'm planning on driving the car and seeing what breaks next. Maybe the sound will get to the point where I'll be able to pinpoint the source.
Oh, wait. My old gas guzzer indie has one of those sethascopes!!! Going there this week.
__________________
daw_two Germantown, TN Links: Sold last car --- 05/2012 1984 300D Light Ivory, Red interior No longer selling Cluster Needles Paint No longer selling New Old Stock (NOS) parts Past: 3/2008 1986 300SDL "Coda" 04/2010 1965 190D(c) "Ben" & many more
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