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#1
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Awful engine rattle
Sounds like bolts in a dryer.
Limped car to mechanic. He tried to brighten the mood, "the rest of the car is so cherry, if all you need is a new engine ..." The Silver Bullet (1979 300SD with just 130k) is in the shop. I hope the verdict isn't catastrophic tomorrow. |
#2
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Failed harmonic balancer?
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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 |
#3
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if failed Harmonic Balancer, how bad ?
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#4
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Not that bad. Could be a failed vacuum pump too I think. Not sure if a failing early double diaphragm style pump rattles or not.
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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 |
#5
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if a failing vacuum pump, wouldn't lock/unlock doors etc be affected?
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#6
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Answer
Quote:
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__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#7
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In my experience, Mercedes get noisy rattliing sounds when they need maintenance. Usually not too expensive if you do the repair yourself. Oftentimes, it's the air intake system rattling around.
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Codifex 1981 240D ChinaBlue (Got her running with a donor engine.) 1983 300DTurbo w/sunroof. 1984 300TD manual sunroof. (Electrical Gremlins) |
#8
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this sounded like something loose under the valve cover
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#9
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any one adjust valve recently? I have had lifters fall of their perch when I was new at adjusting valves
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1999 w140, quit voting to old, and to old to fight, a god damned veteran |
#10
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Cejpat- Is this an (independent) Mercedes mechanic? Has he done work to the car for you in the past and how long have you had the car?
Hate when they jump to the "new motor" solution so quickly.....even if only to make you feel better....... |
#11
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Is it there at all RPM and temps or does it go when reved or warm? If it goes away it could be injector nailing, and could just be a bad injector. It could be this even if it does it all the time though too, depending on how bad the injector is.
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Andrew '04 Jetta TDI Wagon '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#12
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Need to use a stethascope to pinpoint the sound in a case like this.
Do not assume the worst until you have the facts. I had the same experience... twice. First time was the same sound you describe. Two mechanics who listed to it said I needed a motor. A third, already drunk as a skunk (it was a Friday afternoon) walked up, listened, and pointed to the alternator, then told the other two what they used for brains. And the answer was: alternator bearing failure. Second time, I self-diagnosed a bearing failure (it was a more subtle knock) and sold the car the next day for $350. And the answer was: injection pump failure. Car is still on the road today, with a rebuilt pump installed.
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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 |
#13
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Hmm
My first suspicions:
#1. Valve adjustment bad or failed adjustment locking nut. Valve adjustment OM615, 616, 617 FYI. #2. Injector nailing. Strong nailing Injector + Heat shield + Nozzle, Prechamber + Collar, and Nailing. LINK THREAD Diesel Injection: .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#14
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X2 on listening to where the sound comes from.
When the Air Filter Bracket/Air Filter Housing is loose or broken it sounds like something is going to come off of the Engine. I had a rattling sound in the front of the Valve Cover and it turned out the small upper Timing Chain Guide (#89 in the pic) was loose. Tightend the Bolt up and no more issues for over 4 years.
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84 300D, 82 Volvo 244Gl Diesel |
#15
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Quote:
I hope you know this shops general reputation. Certainly an engine at 135k miles can have serious issues but not that common if the milage is indeed accurate. You do fuel the car yourself? If not someone loading gas into it might not be very good. I am unaware if it would make the sounds you describe though with bad or unsuitable fuel.. |
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