rb20det fuel/oil leak, please help!

Discuss the RB20, RB25 and RB26 series engines.
dylzoid269
Posts: 7
Joined: Fri Nov 29, 2013 12:24 pm
Car: 89 nissan 240sx with an rb20det swap.

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So i noticed a fluid leak about 3 weeks ago on my rb20 swapped s13 and at first i noticed it dripping from the oil pan, and though maybe a bad oilpan gasget went bad. so i kept an eye on my oil levels for about a week and they have barely changed at all. Which is confusing because it a puddle the size of my 9 1/2 size shoe every mornig when i leave for work. so one day i decided to dip my fingers in it and smell it feel it all that nonsese and it smelled strongly like gas. I have noticed my fuel economy drop but i thought maybe it was just my driving it too hard or something. any ways thanks for any help or in put as to what it might be or to anyone who has expereinced a similar problem.


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Syrus33
Posts: 112
Joined: Sat May 30, 2009 6:52 am
Car: 1993 Nissan 240sx Hatch
RB20DET

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Check the two fuel lines on the passenger side of the motor

dylzoid269
Posts: 7
Joined: Fri Nov 29, 2013 12:24 pm
Car: 89 nissan 240sx with an rb20det swap.

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Alright man, I'll try that. As far as I've noticed those two lines haven't been leaking but I'll definitely check for abnormal behavior

Yellow4g63
Posts: 3718
Joined: Mon Jan 20, 2003 6:07 pm
Car: 95 Nissan RB20 240SX RB20
91 Nissan NX2000 VE power
95 Nissan 240SX Stock
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could be a leak from the valve cover, if you have a fuel leak you will be able to smell it right away. when u pop the hood or driving.

dylzoid269
Posts: 7
Joined: Fri Nov 29, 2013 12:24 pm
Car: 89 nissan 240sx with an rb20det swap.

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I had a friend look into it at Nissan and he said I just needs to be tuned up and the reason there is gas smell in the oil is because it's running Ritch

Yellow4g63
Posts: 3718
Joined: Mon Jan 20, 2003 6:07 pm
Car: 95 Nissan RB20 240SX RB20
91 Nissan NX2000 VE power
95 Nissan 240SX Stock
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Could also be a leaky injector too.

dylzoid269
Posts: 7
Joined: Fri Nov 29, 2013 12:24 pm
Car: 89 nissan 240sx with an rb20det swap.

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I'm just going to get a tuner and tune it. If it is still doing it I'll check the injectors and fuel lines at the rail. Also I'll replace my oilpan and gasket just for good measure.

dylzoid269
Posts: 7
Joined: Fri Nov 29, 2013 12:24 pm
Car: 89 nissan 240sx with an rb20det swap.

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Thanks for all the input and support btw guys. I really appreciate it.

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AZhitman
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Car: 58 L210, 63 Bluebird RHD, 64 NL320, 65 SPL310, 66 411 RHD, 67 WRL411, 68 510 SR20, 75 280Z RB25, 77 620 SR20, 79 B310, 90 Z32, 91 GTi-R, 92 Silvia Qs, 98 S14, 23 Z.
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Welcome aboard!


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