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Join Date: Apr 2009
Posts: 182
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1986 911 return fuel line clogged? Need some help!
I have a 1986 911 that I am working on to rebuild. Motor is out, tank is out. I was trying to blow out the fuel lines. Supply line was fine. Return line seems to be clogged. There is not a check valve in the line right? If not is there any way to clean the lines? Is the line in the tunnel plastic? If it is clogged do I replace both front and rear rubber lines?
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03-01-2024, 03:37 PM
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I know in my 72 the return line has a designed in restriction in the line . . even though the exterior line diameter is standard there is a molded in restriction down to 1/8" or so, not sure on a 86. This restriction is between the rear mounted pump and engine.
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03-01-2024, 03:59 PM
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PCA Member since 1988
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When you say it seems clogged, do you mean partially clogged, or totally plugged?
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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03-01-2024, 07:24 PM
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Join Date: Dec 2014
Posts: 13,924
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They’re plastic or polymide, as long as engine is out might wanna replace them anyway. They run in the left side of tunnel.
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03-01-2024, 07:59 PM
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they seem pretty clogged. I can get a little air to move thru them but not much. Definitely some crud inside them for sure
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03-02-2024, 04:03 AM
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PCA Member since 1988
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Since you have the drivetrain out, now is the time to replace the lines. It would suck to put the motor back in, then find out you have to replace hem.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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03-02-2024, 02:07 PM
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Join Date: Apr 2009
Posts: 182
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yup it seems like that is my only option. Is it possible to attach the new one to the old one and pull it through together without having to open up the tunnel etc? Any tips would be great
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03-03-2024, 11:19 AM
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PCA Member since 1988
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Yes. Contact Len for new lines and the coupling that allows you to pull the new one through with the old one. He is "BoxsterGT" on the Forum.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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03-03-2024, 02:32 PM
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Join Date: Apr 2009
Posts: 182
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Funny I just reached out to him to see if he made these. Thanks
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03-03-2024, 06:05 PM
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1972 Porsche 911 t Targa
1966 Chevrolet Corvette 427
