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#1
01-27-2013, 01:30 PM
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A coolant tube mystery tour
I (fairly) recently posted about a coolant tube that's mysteriously disconnected and just hanging out in the engine compartment. I didn't have pictures at the time, but I've taken a video, and posted on youtube.
basically, what we've got here is a coolant line that comes from the tank, goes over the radiator, comes down into the oil cooler(?), dives down through the engine compartment and ends up leaning (and open) against the brake fluid reservoir compartment on the driver's side... Coolant loss is significant, as you'd expect. I filled that tank up 71 miles ago, and it's about 25% down from the fill line... any help/ comments are appreciated. 
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Ethan Hunter  1986 Mercedes-Benz 300SDL (263,000 miles) 
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#2
01-28-2013, 12:09 PM
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Answer
That looks like part of a waste vegetable oil heating system, partially removed.
The routing has been altered, and should have been restored to OE spec. .
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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/
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#3
01-28-2013, 09:52 PM
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Quote:
That makes a lot sense, the previous owner mentioned a WVO tank being removed. The right rear quarter panel has a hippie hole in it, where they put the WVO tank fill. As I'm a noobie, can you tell me what I should do? Is this something I can handle (get a manual, figure it out) or take it to a real mechanic (a big boy problem)?
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Ethan Hunter 1986 Mercedes-Benz 300SDL (263,000 miles)
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#5
01-29-2013, 10:56 AM
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that oil cooler thingy is a heat exchanger which uses the heat of the engine coolant to warm the veg oil. we need pics of your #hippie_hole
that hose coming out of the coolant reservoir should just go down to the nipple on the bottom of the passenger side of the radiator. here's a pic of where it goes on my 300sd. 
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1982 300sd from craigslist $800 greased on one tank with NO CONVERSION in the Hot Texas Sun. (currently dead & awaiting engine damage investigation and/or longblock swap) new daily: '03 vw 5speed jetta tdi wagon. bagged&chipped
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#6
01-29-2013, 12:52 PM
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'Hippie hole' Almost doesn't sound safe for work.
At the end of the video, it's a flat plate heat exchanger. PM me if you don't want it. or email moon 161 at gmail.com I'd just restore original plumbing. You may need to do some research and buy some hoses. No big deal.
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CC: NSA All things are burning, know this and be released. 82 Benz 240 D, Kuan Yin 12 Ford Escape 4wd You're four times It's hard to more likely to concentrate on have an accident two things when you're on at the same time. a cell phone. www.kiva.org It's not like there's anything wrong with feeling good, is there?
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