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#1
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Ticking at the front of my 617 engine when cold
I heard a ticking noise from the front of my engine this morning when I stepped out of the car to load some things in the trunk. I wouldn't have heard the sound if I had remained in the car. I drove the car for about a mile and the noise went away. After a 10 minute drive I popped the hood and everything sounded perfect, as usual.
My first thought when hearing the noise was that my vacuum pump was on the way out. Wouldn't the noise still persist if that were the case? It doesn't sound loud enough to be an injector nailing, but I've only heard 616's nail. There really isn't any rhythm to the sound, and it goes away when I rev the engine a little bit. I have a spare vacuum pump, and I'm tempted to install it just to be safe. Is this an easy bolt off/ bolt back on job? It looks like it. Thanks
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'81 300SD |
#2
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Search on vacuum pump failures
I am certainly no expert on that noise you heard, but do a search on vacuum pump failures. There is a lot to read about them. Depending on the miles on your engine, you might want to replace yours just in case.
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1984 300D 398K-daily driver 1998 Honda Accord 102K -wife's daily driver 1991 Volvo 740 289K 2000 Toyota Corolla 143K |
#3
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Cruise control can make a clicking sound. Put your hand on it to see if you can feel the clicking.
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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 |
#4
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Get a Mechanics Stethoscope or a piece of Broom stick and put it against what you want to listen to and your Ear on the other end.
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84 300D, 82 Volvo 244Gl Diesel |
#5
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Fuel line works well, too -- I always have some lying around, so that's what I use.
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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes 1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die." |
#6
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Quote:
I have one but actually don't like using a Mechanics Stethoscope. I find the Noise is too loud. Also wihout modification you have to get Your Face too close to stuff. 35 Years ago I burned My cheek on a hot Exhaust Manifold trying to get cloes enough listen to something with a Stethoscope. And, if the Stethoscope happend to get caught in moving parts it is stuck in your Ears! So I normally use a 3-4 foot piece of Broom Stick. It also can be stuck down beteen places that other stuff will not reach.
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84 300D, 82 Volvo 244Gl Diesel |
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