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BDSBSS23
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PostPosted: Sun Feb 02, 2014 8:40 pm    Post subject: How to fix fuel leak? Reply with quote

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I have an 81 rabbit diesel truck and one of the fuel metal line is leaking where it is fitted on the top of the injection. Is there a seal I can replace just fixing this leak?
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Last edited by BDSBSS23 on Mon Feb 03, 2014 6:49 am; edited 1 time in total
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Old n' slow
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PostPosted: Mon Feb 03, 2014 6:18 am    Post subject: Reply with quote

If I understand you correctly the answer is no . There is no seal where the metal fuel line connects to the injector . At the end of the metal fuel line is a flare capped off by a flare nut and it screws down on the metal nipple of the injector . I've owned three of the 80-81 Diesels and had the lines off many times but never encountered a leak there . Either tighten it up ( I assume you tried that ) or take it completely off and carefully clean the mating surfaces ( it's very high pressure so don't scratch anything ) . If that doesn't do it I guess ???? it's replacement time ( the line or the injector itself ).
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Old n' slow
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PostPosted: Mon Feb 03, 2014 6:21 am    Post subject: Reply with quote

And please ....now that you own a VW Diesel call it "FUEL" not gas Smile
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Currently own : 1969 Beetle w/ 1600cc, Single Port, Solex 30 PICT 2, Dist. 113 905 205 T, stock exhaust.
All my daily drivers gone but not forgotten;

1964(sunroof)1967 & (2)1968 Beetles , 1968 Squareback , 1963 (23 window )Deluxe Sunroof Bus , 1969 Westphalia camper, 1974 Dasher , 1985 Vanagon , (2) 1981 Rabbit Diesels & a 1991 Jetta Diesel .
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BDSBSS23
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PostPosted: Mon Feb 03, 2014 6:53 am    Post subject: Reply with quote

Old n' slow wrote:
If I understand you correctly the answer is no . There is no seal where the metal fuel line connects to the injector . At the end of the metal fuel line is a flare capped off by a flare nut and it screws down on the metal nipple of the injector . I've owned three of the 80-81 Diesels and had the lines off many times but never encountered a leak there . Either tighten it up ( I assume you tried that ) or take it completely off and carefully clean the mating surfaces ( it's very high pressure so don't scratch anything ) . If that doesn't do it I guess ???? it's replacement time ( the line or the injector itself ).

I did tighten it but I guess I'll take it off to clean it up. I would like to take care of that problem because it is hard to start in cold mornings so hopefully this will improve it.

"And please ....now that you own a VW Diesel call it "FUEL" not gas"
Edited the topic Wink
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Old n' slow
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PostPosted: Mon Feb 03, 2014 7:09 am    Post subject: Reply with quote

It has been my experience that hard starting in the cold has been 1 or 2 glow plugs going bad ( or the relay ) and hard starting any other time is clogged injectors . I doubt it's related to a small fuel leak at the fitting ?
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Currently own : 1969 Beetle w/ 1600cc, Single Port, Solex 30 PICT 2, Dist. 113 905 205 T, stock exhaust.
All my daily drivers gone but not forgotten;

1964(sunroof)1967 & (2)1968 Beetles , 1968 Squareback , 1963 (23 window )Deluxe Sunroof Bus , 1969 Westphalia camper, 1974 Dasher , 1985 Vanagon , (2) 1981 Rabbit Diesels & a 1991 Jetta Diesel .
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BDSBSS23
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PostPosted: Mon Feb 03, 2014 7:22 am    Post subject: Reply with quote

Old n' slow wrote:
It has been my experience that hard starting in the cold has been 1 or 2 glow plugs going bad ( or the relay ) and hard starting any other time is clogged injectors . I doubt it's related to a small fuel leak at the fitting ?

I did test the glow plugs with test light by taking off copper bar and they all are fine. Like you said clogged injectors might be the problem and that could cause that leak to occur? I'll report back once I clean up the mating surface and test it out.
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crsmp5
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PostPosted: Mon Feb 03, 2014 8:00 am    Post subject: Reply with quote

call bullshit.. how does test light on glow plugs with no copper bar work?

amp meter, ok 10-15amp each.. but stll a glow plug can fail and heat middle to tip and carry amps but still not work properly..

next.. metal line would make a mist when runing.. no issue in starting.. if it was issue in starting.. it would have constant misfire..

the rubber returns will leak..

the advance shaft will leak.. that drains pump an dmakes hard to start... betwen #1 and #2 so would drip off engine like lin leak..
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BDSBSS23
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PostPosted: Mon Feb 03, 2014 10:05 am    Post subject: Reply with quote

crsmp5 wrote:
call bullshit.. how does test light on glow plugs with no copper bar work?

amp meter, ok 10-15amp each.. but stll a glow plug can fail and heat middle to tip and carry amps but still not work properly..

next.. metal line would make a mist when runing.. no issue in starting.. if it was issue in starting.. it would have constant misfire..

the rubber returns will leak..

the advance shaft will leak.. that drains pump an dmakes hard to start... betwen #1 and #2 so would drip off engine like lin leak..

Look at the third post. This is what I did.
http://www.thesamba.com/vw/forum/viewtopic.php?t=314872&highlight=test+glow+plug
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BDSBSS23
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PostPosted: Sat Mar 29, 2014 10:45 am    Post subject: Reply with quote

Ok some more question. I haven't really gotten going with fuel leak but I noticed few things.. Starting in the morning it would smoke really bad because I basically have to hold the pedal all the way to the floor to get it start up. Once warmed up it runs good. Other thing is when I'm driving it on the highway for a while it would once a while all the sudden rev up really high and lots of smoke coming out of the exhaust as if the throttle were stuck all the way and refuses to return to normal. I had to turn off the motor and pull over on the side of the road to calm the motor down so it won't overheat from over revving. Any advices? I know other source I can look at is vwdiesel.net but not letting me to register...
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stewardc
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PostPosted: Mon Mar 31, 2014 4:03 am    Post subject: Reply with quote

Wow, that sounds like you've got crankcase oil going back into the air filter. This is usually caused by blowby from a severely wore out engine. How old is this engine and how many miles are on it?
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PostPosted: Mon Mar 31, 2014 4:42 am    Post subject: Reply with quote

I'm not sure how many miles are on the motor. I just got it few months ago. I plan to replace the air filter and add an 2nd breather tube to the the vacuum pump lines that goes to the engine block. Also noticed the throttle cable is sticky so I may fix that as well to help that out a little bit.
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PostPosted: Sun Apr 06, 2014 11:06 am    Post subject: Reply with quote

Added the 2nd breather tube and runaways is gone now. Also starting in the morning, it is not smokey anymore just a little bit. The motor is wearing out for sure but hoping the mod will help the motor to last a little bit longer.
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Old n' slow
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PostPosted: Mon Apr 07, 2014 6:53 am    Post subject: Reply with quote

There was also a baffle that went under the valve cover over the camshaft . I don't think they were standard on the early diesels ( I bought mine back then for my two 81 diesels ) , they stop most of the oil from getting into the breather tube thereby preventing diesel run on . No matter what , it sounds like you will need a rebuild ( or just drop the pan in place pull the head , change the rod bearings and re ring it , most times this will last up to 30K before you need a complete rebuild ) before next winter or forget about starting it when it gets really cold .
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Currently own : 1969 Beetle w/ 1600cc, Single Port, Solex 30 PICT 2, Dist. 113 905 205 T, stock exhaust.
All my daily drivers gone but not forgotten;

1964(sunroof)1967 & (2)1968 Beetles , 1968 Squareback , 1963 (23 window )Deluxe Sunroof Bus , 1969 Westphalia camper, 1974 Dasher , 1985 Vanagon , (2) 1981 Rabbit Diesels & a 1991 Jetta Diesel .
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BDSBSS23
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PostPosted: Mon Apr 07, 2014 4:52 pm    Post subject: Reply with quote

Sucks.. I'll have to figure out what to do at this point. My truck runs ok around town so I'll have to take easy on the driving.
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BDSBSS23
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PostPosted: Mon Apr 07, 2014 7:32 pm    Post subject: Reply with quote

Where can I go to get a good rebuilt/new engine or engine parts from? I'm new with this and not sure where to start.
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PostPosted: Tue Apr 08, 2014 7:52 am    Post subject: Reply with quote

All depends on your budget , thousands to go the rebuilt route , maybe a couple hundred to go the simple rebuild. www.partsplaceinc.com is a good place to start . When money was tight I got 30,000 additional miles out of a really worn diesel before it started to burn oil again. Remove the head , raise up the front & drop the oil pan in place,pull the pistons out, re ring (check rod bearings ). Plus new head gasket and while your at it new belt and tensioner. One day of work and not too much money.
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Currently own : 1969 Beetle w/ 1600cc, Single Port, Solex 30 PICT 2, Dist. 113 905 205 T, stock exhaust.
All my daily drivers gone but not forgotten;

1964(sunroof)1967 & (2)1968 Beetles , 1968 Squareback , 1963 (23 window )Deluxe Sunroof Bus , 1969 Westphalia camper, 1974 Dasher , 1985 Vanagon , (2) 1981 Rabbit Diesels & a 1991 Jetta Diesel .
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BDSBSS23
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PostPosted: Thu Sep 11, 2014 8:41 am    Post subject: Reply with quote

Just want to give a small update about my truck. It runs better and no longer leaks fuel. It's because of bad voltage regulator . One of the brush wasn't touching at all so the amps were drawing too much on the battery causing it to boil. Glad it was an simple fix.
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65 micro bus (project)
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Pillar repair with 65 bus
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