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  #16  
Old 12-19-2002, 05:36 PM
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OK, I have seen THOSE.... Popular Mechanics had articles on making them....in the 40's and 50's....
I guess it WOULD beat a MB hands down...the MB would break through the ice like those automatic anchors on sailboats.....

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  #17  
Old 12-19-2002, 06:43 PM
Old Deis
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P.E. Haiges

I saw your comment about setting up an audible of visual red light to warn of low oil pressure.
A few years ago my then girlfriend noticed the oil all leaked out of her old Dodge when she got off work. I asked so what, pray tell did you do? Well, she drove it straight home and put two cans of oil in there. So now why doesn't it start again? Answer, it was just fried.
So I told some good freinds of this little adventure. One of them had recently married. He went home and asked his wife what would she do if she saw the oil light come on? She said she would drive it home and call him.
So he set up his nice shiny new van with a new system. He wired the oil light to the brake light with a flasher. Then he changed the brake light to read..'BROKE".
So maybe that works?
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  #18  
Old 12-19-2002, 06:55 PM
lrg lrg is offline
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One of my old gassers had a sensor at the bottom of the oil pan that if it wasn't immersed in oil would kill the engine. The car took about 10 quarts of oil and had a deep oil pan so there was no way any amount of sloshing about was going to uncover it. This obviously won't work on a diesel but is a pretty simple way to avoid the problem on gassers. If our cars used an electric fuel shutoff it would be an easy addition.
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  #19  
Old 12-19-2002, 09:29 PM
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Quote:
A few years ago my then girlfriend noticed the oil all leaked out of her old Dodge when she got off work. I asked so what, pray tell did you do? Well, she drove it straight home and put two cans of oil in there. So now why doesn't it start again? Answer, it was just fried
Old Deis, perhaps this is why I freak out about letting ANYONE touch my babies.
So what have we come up with.
Perhaps there is a way to wire up the guage itself, behind the face of the guage where the gear is, so it would close a circuit at 5 or 0 lbs and set off a light or buzzer.
If I had any clue, i'd find an old cluster and play around with that.

Maybe braided hoses are just easier.
Ice boats are cool, but does anyone have THE answer yet?
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  #20  
Old 12-19-2002, 10:32 PM
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Braided hoses would not help with something like the object which fell off another vehicle and trashed the oil pan... or a catastrophic seal failure....
Some kind of auto shutoff or audible warning seems best to me....preferably the latter in case traffic circumstances dictated a choice as to how far the engine was needed....
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  #21  
Old 12-20-2002, 12:52 AM
lrg lrg is offline
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Check out the "Low oil and coolant lights" thread that 123C started. The answer we seek may be on EBay (although it's a bit expensive). Maybe someone wants to buy this and tell us how to make our own.
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  #22  
Old 12-20-2002, 04:29 PM
Larry D
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Maybe it's silly to keep this thread going so long, but Leathermang reminded me with his "pan damage" comment that this isn't the first time this Benz has had an oil related problem. Last year, daughter #3 scraped a hole in the pan while transporting a load of friends. One of them called and told her to check it out, because she'd left a slick in their driveway. The final quart was in my driveway, where she'd parked. Fortunately, a new pan was easy enough to install. Unfortunately, I didn't pick up on this eerie foreshadow.

In hindsight, a flashing light, or buzzer (or my personal pick, a wave file of the USS Enterprise computer announcing initiation of the self-destruct sequence) would be easy to hook up by teeing in a normal idiot-light sensor. A couple of wires, and you'd be good to go. Experience really is the best teacher!
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  #23  
Old 02-22-2003, 12:23 AM
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Now you've got me thinking;
I'm almost positive that my old hyster forklift has a kill wire going to the oil pressure gauge that shuts the engine off if the oil pressure drops below a certain level but I am not sure if the gauge is electric or mechnical. I think the gauge set came with the motor out of a generator or some type of power unit.
I also seem to remember the same type of set up on a boat I bought years ago (which of course we removed immediately) but can't remember the system.
Is there nowhere on a mb diesel to plug in a electric sending unit? You could run one wire and use an idiot light or a "wave file of the USS Enterprise" I have seen threads where people talk about running 10-12 lights on the front of their car so I would think one more wire for a good cause would be a no-brainer.
Checking the forklift in the morning.

Wish I was closer, I could use the parts car.
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  #24  
Old 02-22-2003, 09:03 AM
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I don't think it would be that hard on one of these diesels.

You can "tee" into the oil pressure signal line with a pressure switch which could then either turn a light on or open a switchover valve to put a vacuum on the shut off valve. Get a tubing tee connector with the third leg a NPT pipe fitting then you should be able to find a pressure switch that will make up when the pressure drops to a pre-determined setting.

Not sure it you would want it to shut off on you though in case you are in the fast lane on the interstate when it happens.

Fittings can be found here:

http://www.parker.com/tfd/

Look for EO fittings for the tube application. The oil pressure line is 6 mm.
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  #25  
Old 02-22-2003, 10:10 AM
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Larry D., So what is happening to your engine? Have you made any decisions about taking it apart to inspect it ?
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  #26  
Old 02-22-2003, 12:43 PM
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My 1987 300D has a low oil level idiot light that comes on when its about a quart low of oil. That's about half-way between the "full" and "fill" lines on the dipstick. And of course it also has the traditional (electric sensor) oil pressure gauge.

You can get a lot of value out of that low oil level indicator. With a fast leak of the sort we are talking about, the oil level indicator will activate some time before the low oil pressure indicator. That gives you a chance to pull over while the engine still has oil pressure.

So, an ideal solution would sound a buzzer on EITHER low oil level or low oil pressure. Fairly easy to come up with the electronics on the all-electric 1987 300D.

For my 1982 300D, I'd hate to tee the oil pressure line. But it might be worth coming up with a low oil level sensor.

I think I'd develop a product to replace the dipstick.

Ken300D
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  #27  
Old 02-22-2003, 03:25 PM
Larry D
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leathermang:

I've pretty much decided to let go of the car. The engine is definetely seized, and my preliminary investigation came up with a ticket of $1500 in parts alone to get it running again, assuming I was up to the task myself. (That's a big assumption, since I already have a full honey-do list with new items added weekly...) In addition, the car needs new shocks, suspension bushings, seat cushions, window seals, some electrical work, and all the other things that tend to fall off of a 25 year old car.

I might consider getting into it for a 123 chassis, but I'm just not enough in love with the 115. I would like to get some salvage value out of it, however. All of the glass and most of the body panels are intact, as is the running gear, with the exception of the motor.
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  #28  
Old 02-22-2003, 05:35 PM
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We understand....sometimes the figures just don't add up ....

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