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Bosch 040 Intank Questions About Install

CEF11E

By CEF11E,
in Engines & Forced Induction

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CEF11E Veteran

CEF11E

Posted
Posted

I just bought an 040 to replace my fuel pump and have some questions about the install.

I know you cut the bottom of the standard bracket and clamp the pump to the side of the existing bracket with rubber inbetween to stop vibration. What I need to know is:

do you need to use a filter with the 040 or is there a filter on the bottom of the pump underneath the mesh base?

will can the existing fuel line fit over the fitting on the 040 and then be clamped on or do I need a screw fitting of some type?

Can you get a pump assembly gasket from nissan? they said they only come in kits.

If someone would be kind enough to list a "what you need" list.

Also I spent 1/2 an hour digging thru "pump" bosch" 040" threads looking for a photo of one mounted on a bracket but couldn't find one and I was sure I had seen one here before.

thankyou!

CEF11E Veteran

CEF11E

Posted
  • Author
Posted

sounds good. Did you need to use a new tank seal? and where do you get one.

also are the electrical contacts on the old pump the same? I just want to get everything I need before I pull the car apart.

Chris32 Veteran

Chris32

Posted
Posted

You will need to find 2 nuts that fit over the 040 terminals

Then just need to solder on some connectors onto the standard wiring and secure them to the pump with the nuts

New tank seal is a good idea, Nissan should be able to source you one

Tangles Grand Master

Tangles

Posted
Posted

Hi mate, good luck.

I had mine installed by the mechanics/tuners along with a lot of other gear at the same time, so I cant help much.

Two suggestions: a) I had them direct wire it to the battery feed, so it runs at ~13.8v and not 12v. b) I also made directions that the 040 pump MUST be installed as low in the tank as possible. That way I have no fuel issues, I can go down to near empty and be all ok.

Chris32 Veteran

Chris32

Posted
Posted
Thanks Chris. I will buy the bits I need.

No Probs

Another thing I found helped, angle the return feed away from the pickup point, as with the higher volume pump, it causes cavitation in the fuel (air bubbles) due to much more fuel being pumped back than the stocker. You might have heard it on some cars with up-graded pumps, sound like the pump is sucking in air

I acutally trimmed my fuel return pipe and attached some fuel hose and angled it well away from the pickup point of the pump. The fuel returning is generally much warmer too.

Wiring it straight of the battery is also a good idea, you can do that later if you find the supply is not enough

I think Cubes did a DIY thingo about that

Madtrang Community Regular

Madtrang

Posted
Posted (edited)

DO you need to wire directly from battery or will the 040 pump b ok off of the stock wiring. Will just not pump it's maximum pumping capcity when on stock wiring.

My guess with wiring off of the battery is that the ignition crontrolls the relay that switches the pump on throught the battery is that right?

Edited by Madtrang
The Dan Grand Master

The Dan

Posted
Posted

It's a 12V pump, running it at 13.8 volts does not do anything except heat it up more. You need to cut the earth wire to the pump and direct earth it to the body in the boot somewhere. This removes the dropping resistor from the equation. The resistor is what drops pump speed when you come to idle.

Madtrang Community Regular

Madtrang

Posted
Posted
It's a 12V pump, running it at 13.8 volts does not do anything except heat it up more. You need to cut the earth wire to the pump and direct earth it to the body in the boot somewhere. This removes the dropping resistor from the equation. The resistor is what drops pump speed when you come to idle.

Is that necessary. If your @ idle u dont need alot of fuel being pumped or are there other reasons why it's a good practise to ground it properly.

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