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Third tube on top of fuel sender? 200

posted by  sillyFast on  Sun May 18 22:59 CST 2008
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last visit: Fri Feb 12 15:12 CST 2010
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I have an 82 k-jet 244. I am about to replace both fuel pumps and re-hose everything. I've noticed that there are three tubes on the top of the fuel sending unit from left to right: one connects to the main pump, the middle one is the fuel return(?), and the third is terminated in a loose fiting rubber nipple - what is this and what does it do? Should it be air tight?








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Third tube on top of fuel sender? 200

uid 18083's pic
posted by  lucid on  Mon May 19 00:46 CST 2008
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last visit: Fri Oct 24 12:31 CST 2014
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The rubber cap should be a good fit, for safety at least. There used to be a hose there that came from the back of the (older type) fuel Accumulator. If the accumulator diaphragm leaked, the hose routed the fuel back to the tank.

But at some point the accumulator hose was discontinued and the tank entry was capped off, rather than redesign the sender unit to eliminate the fitting.
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.








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Third tube on top of fuel sender? 200

posted by  sillyFast on  Mon May 19 01:00 CST 2008
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last visit: Fri Feb 12 15:12 CST 2010
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AHA that's right! The newer accumulators only have an inlet and outlet with the vent tube deleted. Thanks and have a great day.








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Third tube on top of fuel sender? 200

posted by  Chris Mullet on  Mon May 19 02:14 CST 2008
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last visit: Fri Oct 24 09:08 CST 2014
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I always find it amusing that we refer to something on our 20 year old cars as being the "new" design.








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Third tube on top of fuel sender? 200

posted by  sillyFast on  Mon May 19 02:27 CST 2008
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last visit: Fri Feb 12 15:12 CST 2010
[RELATED]

Yeah, I'm actually installing a New Upgraded intank pump - even though it's really a 7xx pump!







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