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  #1  
Old October 15th, 2017, 07:58 PM
slorocco
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Dan Prasada-Rao
1963, 109 Station Wagon
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Thread size question

Can anyone help with the right thread size for the fitting on the top of the fuel pick up tube? I have a 63 109 station wagon with the rear mounted fuel tank.

Thanks in advance.
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  #2  
Old October 15th, 2017, 09:49 PM
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Charles Galpin
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Dan, would it be the same fitting as a side tank on a 63 109? If yes, I can see what mine is
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Old October 16th, 2017, 07:35 AM
slorocco
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Dan Prasada-Rao
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Yes, I believe it's the same.


I first thought it was a UNF 1/2" 20 thread pattern but those don't quite fit. The female rover part will thread on to a male UNF 1/2 20 male part. But the female UNF 1/2 20 will not fit on to the male rover threads coming of the top of the pickup tube.








I'm now thinking it may be an old BSP 1/4 thread pattern.
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  #4  
Old October 16th, 2017, 08:02 AM
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John B.
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It will probably be Whitworth.
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Old October 16th, 2017, 08:05 AM
slorocco
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Dan Prasada-Rao
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Yeah, that's what I'm thinking too at this point.


I'm trying to increase the fuel line size. The stock rover stuff comes off of that fitting with a 1/4 in fuel pipe. I'd like to step it up to a 3/8 pipe to better satisfy the needs of the Cummins 4BT.
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Old October 16th, 2017, 09:32 AM
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1/4" hose should be tons.
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  #7  
Old October 16th, 2017, 09:58 AM
slorocco
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Dan Prasada-Rao
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Quote:
Originally Posted by Red90 View Post
1/4" hose should be tons.


Everything on the engine is 3/8, starting with the first fuel filter, fuel pump, and second fuel filter.
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  #8  
Old October 16th, 2017, 05:51 PM
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Charles Galpin
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I have both metric and standard thread checkers, but not whitworth. So not sure I can help.
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Old October 16th, 2017, 06:17 PM
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Robert Davis
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To add...
It could also be straight British pipe thread.
The good news the threads are straight and not tapered.
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  #10  
Old October 16th, 2017, 06:23 PM
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Jack Walter
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Agree with RD, probably BSP British Straight Pipe
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  #11  
Old October 16th, 2017, 06:31 PM
slorocco
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Dan Prasada-Rao
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Thanks for checking Charles. Robert, I think you nailed it. Straight threads with an outer diameter of .51 inches which matches up to the specs for 1/4 BSP
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  #12  
Old October 16th, 2017, 10:07 PM
slorocco
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Dan Prasada-Rao
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Quote:
Originally Posted by JackW View Post
Agree with RD, probably BSP British Straight Pipe
Thanks Jack, I think you and Robert are correct. I found what I think I need from Pegasus Racing. They have some fittings in BSP sizes. Hopefully it will work. $20 plus shipping for one fitting!
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