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  #1  
Old 03-07-2003, 10:35 AM
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Turbo 1981 240D??

I just came across this on eBay. I've never heard of a Turbo 240D, but the picture of the engine looks like there is a turbo there. Could this be true?? Could it be an add on??
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2406454527&category=6329
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1982 300TDT Wagon
1982 240D Euro!, 4spd manual-Parts car now, dead engine
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  #2  
Old 03-07-2003, 11:05 AM
LarryBible
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This is an aftermarket turbo. The MB's equipped with turbos have been modified as necessary to provide adequate durability under turbocharged operating conditions. None of the four cylinders have ever had these modifications at the factory.

I would expect the life expectancy of this engine, if driven aggressively, would be measured in a two digit number of hours. Since the car is for sale, it could be that this number of hours has already passed.

Have a great day,
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  #3  
Old 03-07-2003, 11:23 AM
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Thanks Larry,
That's a shame, it would be nice to have a turbo 240D, but not at the cost of the engine.
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Michael Roth

1982 300TDT Wagon
1982 240D Euro!, 4spd manual-Parts car now, dead engine
88 Jeep Grand Wagoneer-fixing up for offroading
1989 Ford F150 (rust bucket) For Sale!
1953 Dodge B-4F, 1 1/2 ton Stake Bed (new restoration project)
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  #4  
Old 03-07-2003, 02:38 PM
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Just a guess but he cable ties should give it away...

That would be a neat trick though to pull a hill at 60 or 65 instead of 55 in third gear!
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Old 03-07-2003, 03:24 PM
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Ive been embroiled in turbo discussions here most of the day so I can't pass this one up! Its not the turbo that'll kill the engine its the driver/operator. If the car was driven conservatively and the EGT's kept in check there is no reason this engine wouldn't provide decent service. I say this because other non-turbo designed engines have been successfully turboed and have faired pretty well provided the EGT's are kept in check. EGT's are a very good indicator of what is happening in the combustion chamber. Non-oil cooled pistons that aren't designed for turbo use usually start to melt when the EGT's exceed 1100* pre-turbo. Indirectly injected cast-iron engines should be limited to no more than 12-13psi (incidentally the upper limit for MB 5cyl turbos...) without intercooling. These are generalisations I realize..... That said if the 240 engine was healthy, kept at a max boost of 9psi, max EGT of 900* it SHOULD be fine. I doubt it would last as long as a NA 240 but it would definitely be a little quicker. The question you have to ask is would it be worth it in time/ loss of longevity for the small increase in power. Easier to throw in a turbo 5....... RT
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Old 03-07-2003, 03:52 PM
LarryBible
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RT,

I totally agree with what you said. Where practicality enters into the equation, however, is that most everyone drives a 240D everywhere they go with their foot either on the brake or with the throttle hard against the floor. Even a turbo'd 240D would be driven the same almost always IMHO.

With this being the case, I can't imagine keeping the Exhaust Gas Temperature under control.

I love the four cylinder diesel 123 cars with a manual transmission. They follow the engineerin KISS prinicipal (Keep It Simple Stupid) perfectly. But if you want a car with power, this is not the car for you. Putting a turbo on a 240D is like trying to make a Race Horse out of a Pig IMHO.

If you want power, the 240D is not for you. Put up with the added hassle of working under the hood of a turbo'd five cylinder or buy something with a gas engine.

My $0.02,
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  #7  
Old 03-07-2003, 04:22 PM
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Larry,
Keeping the EGT's in check is fairly easy. The best way to do it would be to have a pump shop turn up the wick on the pump just enough but not so high so that it would never provide enough fuel to do any damage. Or moderate it with your right foot.... That said I don't think it would be a worthwhile investment considering what MB engines sell for. Now if it was a VW diesel that'd be an entirely different matter! RT
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  #8  
Old 03-07-2003, 07:38 PM
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Larry hit it on the nose as usual. That is to say nothing about the lower engine assembly. The 300D turbo is said to have been beefed up down there vs. the non turbocharged versions. That is one reason they last so long.
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  #9  
Old 03-07-2003, 08:27 PM
LarryBible
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RT,

You seem to bring up a point that is interesting to me. Are you saying that VW diesels are cheap engines and cheap to overhaul?

If that is the case, I might be interested in having one for my 188 mile round trip commute.

Thanks,
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  #10  
Old 03-08-2003, 12:50 AM
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I opened another thread on this vehicle before seeing this thread. The car in question has a lot of miles on it (almost 300k) and it looks like that turbo install is quite old. It would be interesting to know how long that turbo has been at work in that vehicle. I'm guessing quite a while if the person took the effort to get the 'Turbo diesel' emblem for the trunk.
In the UK there are companies that specialize in installing turbos on the 616 engine in Mercedes commerical vehicles. You wouldn't think they could stay in business if the engines were failing on a frequent basis.
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