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Old 24-09-2012, 18:50   #1
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Fuel Line Olives

Finishing up the rebuild on my Perkins 4-107. Replacing all the fuel line olives. The 1/4 inch ones are easy. The return lines are smaller. What's the trick? With the fuel line thru the olive I can't get it screwed into the nut far enough. If I put the olive in first I can't get the fuel line thru the hole.
Please contribute your two cent so I can get my engine started.
Thanks
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Old 24-09-2012, 19:26   #2
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Re: fuel line olives

Are they the same thread? If so, you may have to chase the threads. Also, check any flaring on the line. Or, perhaps you have the incorrect "olive" for that diameter line.

BTW: Between my brother and I we have 35+ yrs rebuilind auto and marine engines. Never heard the term olive for this. We be in California too.
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Old 24-09-2012, 19:35   #3
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Re: fuel line olives

Thanks for the reply. Olive is the only term I know. Of course I'm kinda new at diesels. This is my first rebuild. Went all the way. Started with a bare block and new sleeves.
Yes, they are correct for the line diameter. The return lines are 0.190. The old ones that came out were totally pressed into the nut thread. The should be the right ones as they came from Northland Diesel in Seattle. They rebuilt my injector pump and they know what engine I'm working on.
They're just very tight because they haven't pressed into the nut thread yet.
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Old 24-09-2012, 20:05   #4
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Re: fuel line olives

here I was expecting a thread on diesel Martinis.
Steve W
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Old 24-09-2012, 20:20   #5
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Re: fuel line olives

Are they designed to be "crushable" threads? That would be a new one to me but who knows, maybe something new is on the market. Anyway, why not go ahead and clean both sets of threads.

BTW: an old Navy machinst taught me something a long time ago and I have not forgotten. When mating thread componets, turn the one piece opposite direction until the threads marry. The click, whether heard or felt, will tell you the two are properly mated and ready for torque.
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Old 24-09-2012, 20:38   #6
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Re: fuel line olives

I think you're getting the wrong impression ... the new rubber olives don't have theads until they are pressed into place. They come smooth. I just can't get them in far enough to catch the thread on the fitting.
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Old 24-09-2012, 21:10   #7
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Re: Fuel Line Olives

STEVENSC ... I just got the joke.
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Old 25-09-2012, 20:53   #8
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Re: Fuel Line Olives

Problem Solved:
How does one splice a loop into a braided line? You use a fid
I made a shouldered fid. The shoulder fit inside the fuel pipe. The rest of the fid was the same diameter as the outside of the fuel line and tapered down to a blunt point. Lube it up with fuel oil and push it through. :-)
Now I'm in the process of bleeding and filling all the fuel lines. What a job to fill and empty system.
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