[MBGraham]

Airtex E8145. Cost me 219.00, I think.

Pierre, who runs a MB shop down in Titusville, told me today that most aftermarket pumps don't do a good job with the PSI and volume requirements of D Jet. The numbers look fine on the upper end, but possibly low delivery volume on the lower end. I'll do a test to see if I get 2L/min soon.

Pierre gave me two old pumps and I might end up with a frankenpump from the three cores I now have...assuming the numbers don't add up on the aftermarket one. when I test it. I'll need to get a gauge to check pressure too. have any thought there?

The E8145 spec says it has a range of 25-35 gph which is 1.57 to 2.19 l/min. But they don't say what affects the capacity. I sent them an email asking what the capacity with 30psig discharge pressure is. Bosch make a universal pump that has suitable capacity, but discharge is straight through. One of their other pumps may also work with a 90deg fitting on outlet like your Airtex.

I have a dash mounted fuel pressure gauge with a remote sensor on the fuel rail (see pic) But if you want to install a gauge right on the rail, there are many available - just do a google search. Most of them have a 0-100psi scale and it is not easy to read the pressure accurately. There are 0-60psi gauges, but they are harder to find. Also 0-30psi, but I wanted to go higher than that. You need to install a tee with 5/16" barbs - I put my pressure transducer on the tubing that runs across the front of the engine. It is mounted on a bracket. For a one time test, I used to put a simple water pump gauge on the tube that goes to the cold start injector. Something like this el-cheapo one:
Make A Fuel Pressure Gauge - MiniMopar Resources

 

[MBGraham]

For anyone considering changing fuel pumps, check this thread:

http://www.benzworld.org/forums/r-c...ng-fuel-pump-early-djet-107s.html#post3805880

Especially the post on Dec 17. Basically it says that the OE pump has an internal pressure relief that limits the pressure output. This is likely a safety feature because of the clamped fuel hose connections. So don'y just switch pumps without considering this.

The other point, is that the voltage needs to be at least 11.5v at the pump when doing a flow test (should be 1L/30sec).

 

[alabbasi]

How did that airtex pump work out?

 

[MBGraham]

Lift off gently and keep in an upright position.

Notice it's off center. When I removed the previous piece, it was stuck against one side of the wall.

Anyone contemplating opening pump, please note that this picture has center disk upside down. More info in this Peach thread 1972 350SL Questions - Page 7 - PeachParts Mercedes ShopForum posts 95 & 99.

 

[Nutz 4 Benz]

Hmm, my fuel pump worked fine afterwards.

 

[dgosh28]

Hi guys,
Just wanted to get an update on the Airtex fuel pumps. Are they still performing properly? Would you buy one again?

 

[08AMG63]

got it running with the new pump

Bump.

Is this pump working ok?

 

[ranchodenieve]

Rumor has it that they also installed D Jet in the Nissan 280Z. The pumps look identical, but the Nisaan pump is around $200. I would think that it should work. I put one on mine to replace a leaker. It seems to work, but I have other fuel injection issues that are plaqueing me now.

 

[jaymos]

I'm feeling pretty stupid here. I'm replacing my leaking fuel pump with a new 280z pump, and I've noticed that it doesn't appear that this vehicle has had a check valve on it. So i'm a bit puzzled as to where the new check valve is meant to go. I've read references to the check valve screwing into the pressure side of the pump, but this pump has a nozzle - there's nothing for it to screw into. Do I have the wrong check valve, or does it go somewhere else?

 

[nine01]

what is the part number for the o ring in the last photo? thanks

 

[nine01]

where can i get the parts to rebuild one of these pumps?

 

[jarni75]

Hello everybody, I had a leaking dJet pump. Opened it, cleaned it, replaced both orings and tested it. Now it does not leak and it works correctly. The only question is, do I have to put some Loctite on 4 screws when assembling the pump? The original pump has some yellow paint on the screws... Is this only colour? Or some Loctite stuff?
Best regards. J

 

[rumb]

Yellow paint only means it was correctly done at the factory.