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#1
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Which monovalve failure mode is this?
I expected to open this up and see a totally rotten bit of rubber. But, the diaphram seems to be just fine.
However, the screen is buckeled into an uneven, eliptical shape and there is what looks like aluminum corrosion deposit on the washers/spring. Most of the corrosion seems to be sticking to the copper (?) flat spring. I've already ordered a monovalve repair kit from Fastlane (should have done it weeks ago so I had it.), but, I was wondering. Does this deposit signify anything about my cooling system? I've got the recommended coolant in there, but I have no clue what the previous owner had in. It might have been whatever was cheapest and, as he lived in No. Carolina, probably didn't need to worry about freezing in his lines like I do.
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Growth for the sake of growth is the ideology of the cancer cell. -- Edward Abbey 1984 300SD: Hilda the veggie vundercar |
#2
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Acidic
Hello sohj
At some time the system has gone Acidic. Neutralize the system, flush, then refill. Hope for the best. Have a great day.
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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/ |
#3
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Litmus papers and draining , flushing and replacing?
I assumed the coolant was neutral. Is it neutral or is is it alkali? If alkali, do I put in vinegar until neutral?
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Growth for the sake of growth is the ideology of the cancer cell. -- Edward Abbey 1984 300SD: Hilda the veggie vundercar |
#4
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I don't think that running a chemical analysis is really neccessary. It sounds like your coolant is in need of changing, that's all. Coolant doesn't last forever and I'm sure that MB has a recommended changing schedule. Coolant goes through breakdown and also absorbs the various metallic and other elements that are present in the cooling system as well as create calcium/mineral deposits based on the minerals present in the water you use when mixing it.
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DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 |
#5
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You should mix the coolant with distilled water.
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#6
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VeeDubTDI, I just noticed in your signature, "2000 Volkswagen New Beetle TDI (RIP)" What happened that the TDI got a RIP? Did I miss something?
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DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 |
#7
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I totalled it in January, 2003. It is sitting in my friend's garage in Stafford County, VA. It still runs... er... it will if a new instrument cluster is installed. I've been selling pieces off of it for a while, and the cluster was one of the first things to go. The cluster contains an electronic engine immobilizer, so without it, the computerized injection pump will not allow the engine to continue to run for more than one second. I have cranked it for 15 seconds or so every few months to keep oil in the head and valvetrain.
Anybody want a 1.9 TDI engine and 5-speed transmission with ECU? All you need is a cluster, which can be found at a junk yard, on eBay, or at the dealer. It has 55,558 miles on it. Oh yeah, the ECU is chipped (~115 hp/210 lb-ft). |
#8
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VeeDubTDI, sorry to hear about your misfortune. It sounds like you made it out OK. That's what matters most.
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DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 |
#9
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Yeah, my friend and I were both okay. The impact was such that it caused the driver's seat airbag to deploy. I was just shaken up a bit, with no bumps, bruises, or scratches. The New Beetle is a very safe car in a collision... because it's designed to absorb all of the impact. Unfortunately, the car usually doesn't survive.
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#10
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That's one of the reasons why I have my 300D as I've heard are very safe in a crash as well.
Well its always better that a car gives up its "life" than you lose yours and the car survives instead. Keep driving safely!
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DJ 84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012 |
#11
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Got another question about the coolant.
Will drain and flush and replace next weekend, now that I've found this deposit. I was planning on doing it in mid-March. What do I need to know to look for on a regular basis? Should I periodically pull the monovalve and look to see if there is more deposit? And, if so, on what schedule? And, was this deposit indeed aluminum corrosion? Should I flush with distilled water? or something slightly acidic or alkali? If it is regular tap water it will be very slightly alkali, I think. Or am I being too fussy?
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Growth for the sake of growth is the ideology of the cancer cell. -- Edward Abbey 1984 300SD: Hilda the veggie vundercar |
#12
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Quote:
It seals and does not leak despite having 2 of 3 bolts holding the thermostst in. |
#13
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You do NOT want acidic or alkali coolant.
Hello sohj
There seems to be an error in communication. Quote:
The system needs to be neutralized with the chemical equivalent of baking soda. You do NOT want acidic or alkali coolant. Here are some links that may help you with the task you face. http://www.advanceautoparts.com/howtos_tips/automedia_html/ccr/ccr20010501rm/index.html?page=/howtos_tips/automedia_html/ccr/ccr20010501rm/ccr20010501rm.htm http://www.wynns.be/ http://www.valvoline.com/pages/products/category.asp?cid=2 http://www.sierraantifreeze.com/ http://www.prestone.com/ http://www.justicebrothers.com/theproducts.htm http://www.gunk.com/ http://www.peakantifreeze.com/whychange.html Have a great day. |
#14
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Quote:
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"If anyone knows other lessons I need to learn, please tell me. I'm tired of learning them the hard way". by JerryBro The Glow Plug Wait: This waiting period is a moment of silence to pay honor to Rudolph Diesel. The longer you own your diesel the more honor you will give him". by SD Blue My normal daily life; either SNAFUed- Situation Normal... All Fouled Up, or FUBARed- Fouled Up Beyond All Repair 62 UNIMOG Camper w/617 Turbo, 85 300SD daily driver- both powered by blended UCO fuels |
#15
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What is affordable to you?
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Bookmarks |
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