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ricobiker Samba Member
Joined: November 14, 2009 Posts: 142 Location: Leesburg, Florida
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Posted: Wed Feb 24, 2010 7:51 am Post subject: where to install the fuel filter |
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1970 vw bus 71 1600 dual port, im replacing all the fuel lines the PO put a inline fuel filter between the fuel pump and the carb, is that right? or should it be between the hard line from the gas tank and the fuel pump?
thanks Rico |
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silverside61 Samba Member
Joined: June 10, 2007 Posts: 505 Location: Winterport, Me
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Posted: Wed Feb 24, 2010 7:56 am Post subject: |
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for many years the fuel filter was put between the pump and the carb. in the past years the general concensus was to move the filter outside of the engine bay, to prevent some risk of fire. so if you move your filter under the vehicle, so it is between the fank and the metal line thru the firewall tin, that would be preferable. |
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kevin77westy Samba Member
Joined: November 12, 2004 Posts: 795 Location: Ocean Springs, MS
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Posted: Wed Feb 24, 2010 7:57 am Post subject: |
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Put it somewhere not in the engine bay. Like right under the tank or just before it goes through the engine tin.. Lots of volks put it between the pump the the carb but its not the best place given the possibility of an engine fire.. |
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calebmelvin Samba Member
Joined: July 19, 2006 Posts: 3140 Location: Seattle, WA
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busdaddy Samba Member
Joined: February 12, 2004 Posts: 51057 Location: Surrey B.C. Canada, but thinking of Ukraine
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Posted: Wed Feb 24, 2010 8:06 am Post subject: |
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I prefer locating it just after the tank outlet, just ahead of the tin is also just over the heat exchanger dump and #3 exhaust pipe, pretty warm there. _________________ Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
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Слава Україні! |
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ned Samba Member
Joined: June 28, 2004 Posts: 1574 Location: Arroyo Grande Ca.
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Posted: Wed Feb 24, 2010 8:26 am Post subject: |
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Put it where it is most convenient for you.If you put it between the pump and carb. be sure to use the proper sized hose clamps. |
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TomWesty Samba Member
Joined: November 23, 2007 Posts: 3482 Location: Wyoming,USA
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Posted: Wed Feb 24, 2010 8:33 am Post subject: |
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I got German Supply's kit. Has all of the hoses, clamps, hardline through firewall and grommet and filter and diagram. A good deal. |
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calebmelvin Samba Member
Joined: July 19, 2006 Posts: 3140 Location: Seattle, WA
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50255
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Posted: Wed Feb 24, 2010 8:55 am Post subject: |
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I have no qualms against having a METAL fuel filter with CLAMPS in the engine bay. The system is already dangerous as heck because of the high tank location and the use of rubber hoses running to the carb, the addition of a metal fuel filter isn't going to add much of anything to the already large fire risk. There is a good argument for putting the filter before the pump when and if there is not a screen in the tank to keep large pieces of sediment from reaching the pump.
Pros for putting a METAL filter in the engine bay.
*Very easy to access and change
*Less risk of lost fuel and attendant fire when changing filter
*Gives carb(s) protection from pieces of failing fuel pump
Cons for putting a METAL filter in the engine bay.
*Does not protect fuel pump
*If you fail to occasionally change the filter it will rust through causing fuel spillage onto engine
To reduce the risk of fire use fire resistant AN fuel lines or marine fuel lines, and wire the inlet tube to the carb. |
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Sawsalesman Samba Member
Joined: May 27, 2009 Posts: 796 Location: Ashland, NH
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Posted: Wed Feb 24, 2010 4:16 pm Post subject: |
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Does Scott make a kit for the Type 1 motor? I was thinking that his kit is for the Type 4. |
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calebmelvin Samba Member
Joined: July 19, 2006 Posts: 3140 Location: Seattle, WA
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Sawsalesman Samba Member
Joined: May 27, 2009 Posts: 796 Location: Ashland, NH
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Posted: Wed Feb 24, 2010 5:54 pm Post subject: |
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Ah, I see that now. Thanks for the link. |
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Tom Powell Samba Member
Joined: December 01, 2005 Posts: 4855 Location: Kaneohe
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Posted: Wed Feb 24, 2010 8:38 pm Post subject: |
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I have my own opinions about filters and where to place them.
My opinions differ from other, more experienced and knowledgeable Samba members, but I have my reasons for doing it my way and I've never had a fire, but I do carry two extinguishers one by the driver's seat and one by the passengers seat, and I know exactly what I will do if I should have a fire.
I live in Hawaii and my camper is in California. I use it twice a year for two months at a time.
Once I got bad fuel at a station. It was probably from their gasoline tank that had been filled with diesel from the delivery truck. The engine would run at high rpm but would die at low rpm and then start easily after a few minutes. I struggled with diagnosing the problem for several hours before I finally pumped some fuel into my empty glass piss jar and saw the separation between the two fuels. After draining my fuel tank and putting in real gasoline the engine ran fine.
For this reason, and to prevent tank sediment from reaching the pump. I want a large clear filter between the tank and pump. And I want that filter to be convenient to see, so it is in the engine bay on the left-side no-battery tray. The rubber fuel line that comes from the tank connects to a brass barbed fitting in the firewall hole and a rubber hose connects to the other end of the barbed fitting to the observation filter. The barbed fitting in the hole prevents chafing on a hose.
I also have a glass in line filter between the fuel pump and carburetor which replaces the OG plastic filter. I want this filter to prevent any particles that might pass the pump from reaching the carburetor. And when I start my engine after six months of sitting idle I want to see fuel in that filter before I kill the battery. And i want to see the color of the fuel.
All hoses are clamped and the system is inspected before the semiannual startup.
If this was a daily driver and not vacation transportation I might use a different system. But a system that does not leak is what we are are trying to achieve. And proper installation and maintenance will minimize the fire risks.
I have my reasons and I'm sure others will differ.
Aloha
tp |
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Paslode235 Samba Member
Joined: March 29, 2004 Posts: 163
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Posted: Wed Feb 24, 2010 8:46 pm Post subject: |
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The way I have always taught to do by official VW service mechanics from the 60's and 70's is always put the filter BEFORE the pump. This way all the gunk from the tank will not go through your pump and clog the pump. They said this was a common problem. If you also want to put one between the pump and the carburetor that is fine, but it would be over kill. _________________ "We make a living by what we get, but we make a life by what we give." Sir Winston Churchill
Mint Green 1965 Beetle - "Misty"
White 1974 Westy - "The Fig Rig"
Yellow 1972 Super Beetle - "Jasper" RIP
Black 2001 Jetta wagon - "Gadget"
Red 2004 Jetta TDI - "Lucy" |
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Desertbusman Samba Member
Joined: June 03, 2005 Posts: 14655 Location: Arizona
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Posted: Wed Feb 24, 2010 10:13 pm Post subject: |
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Question- Where did VW locate the original stock inline filter?
For info, if you put one in after the pump it is presurized. Any leak or hose connection problem if it doesn't blow apart it will spray fuel. And generally right all over the ignition system or the sparking generator. If it's between the tank and pump there isn't pressure and it will drip. No matter where you have it located it's apt to drip down on the exhaust. _________________ 71 Superbug
71 Westy |
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SGKent Samba Member
Joined: October 30, 2007 Posts: 41031 Location: Citrus Heights CA (Near Sacramento)
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Posted: Wed Feb 24, 2010 10:35 pm Post subject: |
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Quote: |
I have no qualms against having a METAL fuel filter with CLAMPS in the engine bay. The system is already dangerous as heck because of the high tank location and the use of rubber hoses running to the carb, the addition of a metal fuel filter isn't going to add much of anything to the already large fire risk. There is a good argument for putting the filter before the pump when and if there is not a screen in the tank to keep large pieces of sediment from reaching the pump.
Pros for putting a METAL filter in the engine bay.
*Very easy to access and change
*Less risk of lost fuel and attendant fire when changing filter
*Gives carb(s) protection from pieces of failing fuel pump
Cons for putting a METAL filter in the engine bay.
*Does not protect fuel pump
*If you fail to occasionally change the filter it will rust through causing fuel spillage onto engine
To reduce the risk of fire use fire resistant AN fuel lines or marine fuel lines, and wire the inlet tube to the carb. |
x2
There are advantages and disadvantages of both. I do agree that a metal fuel filter is a good choice. In a mechanical pump there is a little disk that acts as a valve. If a piece of debris gets between it and the seat the pump won't pump. This and less risk of fire is a strong argument for under the bus. However a mechanical pump has less suction than a rotary FI pump and there is no return line to keep sediment stirred up so there is more risk debris plugging the filter. IMHO, each person needs to decide what works best for them and go with that. In the Los Angeles basin in the 1970's if you took your VW to most dealers it was going in the engine bay. Can they rub, wear through and leak - yes, I've seen it. Would you see it under the car, unlikely. Does it remind you each time you look at the engine if it is in the engine bay? People could probably take either side of this and argue all night. Mine is under the car but it is on a 77 FI bus just where the engineers put it. It was on the inside of the engine bay in my 1971 bay and the dealer put it there. It had no filter when we bought it. _________________ “Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
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SoFlo1970BusTypeII Samba Member
Joined: March 31, 2022 Posts: 8 Location: South
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Posted: Thu May 25, 2023 12:26 pm Post subject: |
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TomWesty wrote: |
I got German Supply's kit. Has all of the hoses, clamps, hardline through firewall and grommet and filter and diagram. A good deal. |
My chance you have a photo of that diagram you can post? |
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