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#1
07-06-2013, 11:04 PM
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'84 300td turbo intake leak?
I just bought a 300td parts car, my first Mercedes. It was in a wreck on the front passenger side that bent the frame of the car. I bought the car for the engine so I just took it for a steep hill climb which was the first time i have put any load on the engine since the test drive. Climbing the hill, I noticed that other than the usual turbo noise there was an additional loud hiss when the turbo spooled or had any pressure. Are leaks between the turbo and intake common on these cars?
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#2
07-06-2013, 11:28 PM
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none of the ones I've had leaked...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#3
07-06-2013, 11:56 PM
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With the Engine Cold spray down the manifolds and turbo and parts of the Exhaust in the Engine Compartment with a mix of 1 gallon of Water to 1 cup of Dawn Dish Soap. Reduce the formula as you like.
That makes a mix that will make Bubbles. With the Engine cold and revved up you should see bubbles where the leak is. The Turbo to Manifold is sealed by 2 O-rings. It is possible for the Manifold Nuts to be loose. However, be careful tightening them as the end of the Stud going into the Head has only 4 complete threads on it. If there is a big enough leak it is possible to over speed the Turbocharger.
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84 300D, 82 Volvo 244Gl Diesel
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#4
07-07-2013, 12:37 AM
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My biggest worry is that the turbo was "bumped" during the wreck since collision was on the passenger side front fender. Hopefully I am just being paranoid and it's just a blown seal somewhere. Still I definitely do not want to ruin the turbo.
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#5
07-07-2013, 12:49 AM
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There's also a rubber seal on the U-tube before the turbo which can cause a leak if it's out of place.
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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
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#6
07-07-2013, 06:55 AM
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The waste gate hose may have an issue.
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83 SD 84 CD
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#7
07-07-2013, 12:21 PM
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Quote:
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#8
07-07-2013, 03:23 PM
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No vacuum, if an early turbo. Later units had an ARV on the front which has a vac line.
Here's a pic of the hose.
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83 SD 84 CD
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