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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Aug 2011 Posts: 835 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 835 | I recently installed a new double acting fuel pump to replace my old and tired fuel only pump. I bent up a new gas line and vacuum lines from straight sections of brake line from a nearby flaps. All went pretty smoothly. I had a question as to how to plumb up the vacuum lines, here is what the factory assembly manual says: Fuel pump page from factory assembly manual. And here is a picture of the pump: New pump. The line that goes to the windshield wiper motor is on the right, the one the arrow points to, the one marked "in", This is consistent with what the Factory Assembly Manual indicates. Here are a few pictures of the pump installed on the '53 Powerglide engine in my '51 burb. Engine RH side. Fuel/vacuum pump closeup. Fuel/vacuum lines at carb Enjoy! Kurt | | | | | Joined: Dec 2006 Posts: 1,464 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,464 | Looks great! What size line did you use for your fuel line and did you use flare fittings? I want to redo my fuel line and that looks really good. | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I really like how the dual pumps help the wipers but, they have a bad habit of disintegrating the shaft seal. This allows engine oil to be sucked into the intake manifold.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Aug 2011 Posts: 835 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 835 | Waldo, Thanks for the nice words.
I used 5/16 inch line for the gas, which was the same size of the original line. I used 1/4 inch for the vacuum lines.
I did use flare fittings. I made the flares with one of those inexpensive flaring tools. I practised three or four times on a piece of tubing until I got the hang of it. I mounted the tool in a vice. Making a good 90 cut is critical, and de-burring and bevelling the tube before making the flare is also very important.
Kurt | | | | | Joined: Aug 2011 Posts: 835 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 835 | Dave,
Any idea of how long the shaft seal lasts?
Kurt | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I have just had a few come through my shop with the problem lately, not sure how many miles they had on them.
You will also notice a loss in wiper power when the seal goes.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Aug 2011 Posts: 835 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 835 | How do you diagnose the problem? Black smoke out the tailpipe/more than usual oil consumption?
Kurt | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | On the Buick it was leaking oil out a vent hole.
On the Chev the wipers would stop on acceleration like there was no booster pump.
The owner had just bought the truck so I am not sure how much oil it used.
See the USA in your vintage Chevrolet! My Blog | | |
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