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Extremely Loud Engine Noise
Hello all,
I have a question about my 98 E300TD and was hoping someone would know what the problem could be with my car. I live in Northern VA and the temp is about 20-30 degrees right now and I always warm up the car for about 10 -15 minutes in the morning before driving it. I've notice that my engine is really loud. It has a really deep humming noise when I give it gas. it is also very loud when I am just cruising at about 50-60MPH. If I stop, shut the car off, and start it right back up, the engine is a lot quieter. I don't think it's the engine mounts because i just had them replaced about 20k miles ago. Does anyone know what this could be or why it is doing this? Thanks |
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Hmmm
First question:
Check your V-belts for age, glaze, and tension. Drive Belts: Drive Belts Second question: When where your fuel filters changed? Third question: Have you used vegetable oil as fuel? Fourth question: Have you added biocide to the fuel tank? Fifth question: Is this winter diesel in your fuel tank? Alternative fuel links (Diesel) Alternative fuel links (Diesel) Cold weather starting links http://www.peachparts.com/shopforum/diesel-discussion/137674-cold-weather-starting-links.html#post1018529 MB diesel filtration, how it works. http://www.peachparts.com/shopforum/diesel-discussion/141211-mb-diesel-filtration-how-works.html#post1055075 fuel filter change http://www.peachparts.com/shopforum/diesel-discussion/112664-fuel-filter-change-post824006.html Diesel filters, no tank strainers please. http://www.peachparts.com/shopforum/diesel-discussion/140349-diesel-filters-no-tank-strainers-please-post1046422.html?posted=1 Algae/Fungus fixation... Algae/Fungus fixation... Braided fuel lines weep. 1984 300TD turbo Braided fuel lines weep. 1984 300TD turbo Check out this fuel pickup screen Check out this fuel pickup screen 300SD Fuel Filter Replacement Instructions 300SD Fuel Filter Replacement Instructions Biobor, what is it, why do I need it??? http://www.peachparts.com/shopforum/diesel-discussion/105304-biobor-what-why-do-i-need.html#post723857 Filters, Fungus, Biocide, etc. http://www.peachparts.com/shopforum/diesel-discussion/115952-filters-fungus-biocide-etc-post823378.html Algae Clogged Filter Pic StarTron WORKS ! Algae Clogged Filter Pic StarTron WORKS ! W123 Fuel Tank Screen Replacement W123 Fuel Tank Screen Replacement Recommended diesel fuel additives? http://www.peachparts.com/shopforum/diesel-discussion/166888-recommended-diesel-fuel-additives.html#post1298228 fuel additives http://www.peachparts.com/shopforum/diesel-discussion/32674-fuel-additives.html#post179712 Additives http://www.peachparts.com/shopforum/diesel-discussion/89658-additives.html#post589420 Diesel Engine Additives (Fuel, Oil, Trans, Brake, etc.) http://www.peachparts.com/shopforum/diesel-discussion/198602-diesel-engine-additives-fuel-oil-trans-brake-etc.html#post1607735 Have a great day.
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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/ Last edited by whunter; 01-03-2008 at 10:25 PM. |
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And a comment, it will warm up when driving, drive it easy instead of idling and you won't foul your rings as much.
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Gone to the dark side - Jeff |
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I'd be curious to hear your theory behind this. As an indirect injection engine, I've heard the 606 engine runs beautifully on vegetbale oil, if properly converted (ie, two tanks, sufficient heat, clean oil)
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Jake 1999 e300d PlantDrive WVO/SVO conversion **note to self: oil changed at 268k kms** 1990 Toyota 4Runner FrankenDiesel swap |
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Answer:
Quote:
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Last edited by whunter; 01-03-2008 at 10:17 PM. |
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Quote:
sorry for the hijack
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Jake 1999 e300d PlantDrive WVO/SVO conversion **note to self: oil changed at 268k kms** 1990 Toyota 4Runner FrankenDiesel swap |
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How do "rings foul?" What happens when they foul?
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You shouldn't need to warm it up so long. On days where it is below 40 I get heat within a few blocks of home and am at full op temp within 2 miles with no warm up.
Try popping the hood and listening with a mech's stethoscope or metal rod or even a broom handle to different parts of the engine AND the exhaust while you are letting it warm up. From your description it should be very easy to find where the sound is coming from, then we can help. NFN - The only 606.962's I know of running on veggie burn 5 gal jugs of SVO in a single tank Elsbett system. I'm dubious about that system for the long term personally. I know no one burning WVO in a 606 turbo. The 606 does burn B99 just fine. You will need to change some o-rings eventually but that is not too difficult. I get 10% less mpg's burning commercially prepared B99 (which costs more than D2 currently) so is not to be done if you are cost conscious.
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Terry Allison N. Calif. & Boca Chica, Panama 09' E320 Bluetec 77k (USA) 09' Hyundai Santa Fe Diesel 48k (S.A.) |
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They get stuck/gummed up. That and bad/fouled inj spray patterns result in "sudden death syndrome" from burning unheated oils not intended to be used as fuel. Loss of compression or burning a hole in tops of piston is common cause.
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Terry Allison N. Calif. & Boca Chica, Panama 09' E320 Bluetec 77k (USA) 09' Hyundai Santa Fe Diesel 48k (S.A.) |
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Thanks for all the replies.
To answer WHUNTER's questions, The both filters were changed about 15K miles ago. I don't run on biodiesel or vegetable oil. I have not added any biocide to the fuel tank. I not sure what winter diesel is, I just fill it up at the gas station. TMAllison, I will try what you suggested to see if I can find where the noise is coming from. Thanks |
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What about
Quote:
Check your V-belts for age, glaze, and tension. Drive Belts: Drive Belts |
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