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#1
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Source of my Vacuum Leak?
so i was changing the short coolant hose that goes under my thermostat housing to the water pump, and noticed that the two vacuum lines going into what i presume is the temperature sensor were not connected and that one of the stems was broken off.
i've only had the car for a week or so and haven't been running it, but it does have a problem with the vacuum system that i haven't begun to diagnose yet. i'm guessing this is the source. what do you guys think and is this the part to replace it? specifically, what sort of problems would i be noticing if this isn't connected and working? i expected a temp sensor to have wires coming out of it, not vacuum lines. |
#2
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I believe that is a temp switch that goes to the EGR. I had the same problem and I removed it along with the rest of the EGR lines.
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1981 300TD 2005 C55 2004 E500 1999 ML430 1992 400E 1998 C43 2001 SL500 1988 300SEL 1986 190E 16V 1991 190E 2.6 |
#5
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Quote:
Quote:
The EGR valve is vacuum actuated. The temperature switch prevents EGR operation (ie: blocks vacuum form getting to the valve) when the engine is cold. It doesn't have any wires because the valve is not electrically operated. |
#6
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Quote:
is this then, the proper part? http://cgi.ebay.com/ebaymotors/Mercedes-Engine-Sensor-Switch-Temp-Radiator-0065453924_W0QQcmdZViewItemQQcategoryZ6755QQihZ018QQitemZ280190958002QQrdZ1QQsspagenameZWDVW |
#7
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You must have some inside information about this particular car that the rest of us don't have.
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#8
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What model/year? This is likely what you need (or don't need): http://cgi.ebay.com/ebaymotors/Mercedes-Thermo-Vacuum-Valve-Switch-0011407360_W0QQitemZ320121755246QQihZ011QQcategoryZ6763QQrdZ1QQssPageNameZWD1VQQtrksidZp1638.m118.l1 247QQcmdZViewItem Last edited by tangofox007; 01-14-2008 at 11:29 PM. |
#9
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#10
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and the part number is "000 140 33 60"
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#11
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That switch is never required, unless you plan to run EGR.........for some unknown reason. |
#12
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I'm sure it is the EGR switch, but I thought it would get vacuum when the EGR is supposed to open (unless it's blocked off). Wouldn't it be a potential leak?
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#13
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The photo looked as though both ports were disconnected.........so, the switch is not functional..........unless I'm missing something.
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#14
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I believe vacuum is suppled to one port and the other goes to the EGR. I was assuming that it was originally connected (but broken). I agree that the solution is to block the line.
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#15
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Maybe the lines to and from the EGR are completely removed...........I don't see any........... |
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