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#1
03-02-2006, 05:03 PM
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Fuel tank vent line
WHere is the fuel tank vent line on a 84 300D euro?
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2000 VW Jetta TDI with 213,000 miles and climbing 84 300D non turbo getting ready for wvo conversion 
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#2
03-02-2006, 08:33 PM
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[QUOTE=sodapop6620]WHere is the fuel tank vent line on a 84 300D euro?
On mine its, driver side above the axle. You should see two up there coming out of the tank, ones a little bigger and I think thats the vevt, other ones the return.
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 1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car"
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#3
03-02-2006, 08:35 PM
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Yes there are 3 fuel line coming out of the tank. One of them is your vent line.
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1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair 
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#4
03-02-2006, 08:55 PM
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Correct. Make sure you keep the vent clean. I found out the hard way on my 240D. The car would not start one day, no fuel delivery, removed the fuel cap, heard a loud woosh. Primed the injection pump, started up. Cleaned the vent, no problems since. Did the same on my 300D as PM. Alan
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#5
03-02-2006, 09:00 PM
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Its a good idea to check out those two on the drivers side, cause when they leak, diesel drips right on your axle boot
 , not a good thing
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1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car"
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#6
03-03-2006, 02:16 AM
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Thanks for the replies
 . Is there a check valve in the line so I need to use compressed air or can I use a coat hanger to ream out the line? I cannot get 300 miles out of a tank yet. I am not sure if this is the culprit or not but I am getting the whoosh when removing the fuel filler cap
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2000 VW Jetta TDI with 213,000 miles and climbing 84 300D non turbo getting ready for wvo conversion
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#7
03-03-2006, 02:21 AM
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There is a little pressure + vacuum valve at the end of the tube with a dirt boot over the opening. Pressure release is around 200 millibar and vacuum release is 800mb.
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