Fuel leak engine bay

[mattjewell]

Has anybody else heard this noise from an M20? It's getting more pronounced it seems.

[mattjewell]

I'll go ahead and buy the injectors, hose and new fuel filter and see how it's running after that.

As for the sound, it pulls hard and smooth but definitely sounds different.

And thank you!

[turbo55]

No you clean the rail yourself!

Other than engine bay fuel hoses, you might want to take a look at the little bits of hose coming to/from your fuel filter (under the car in front of the driver's side rear wheel).

I think you have an odd sound, the one that's about every half second, like the rubbing or suction sound? If it's rubbing it could be one of the belts, is its suction I'm not sure.

Nice Delphin!

[mattjewell]

I believe I've spotted the leak, it's the hose that's connected to the fuel rail. I'm going to go ahead and replace that one and the one connected to the FPR. Any others I should replace?



Also, does the motor sound healthy?

[mattjewell]

So he will clean the rail too? As well as the injectors?

If that's the case, I'll order the rail and injectors from him and ship him my old stuff as a core.

[turbo55]

The O-rings for the rail side are identical to the intake side. When I got mine cleaned by MEPEH he replaced both sides, so I didn't need to get any new O-rings for them.

Yeah I doubt the rail itself is leaking. Mine was a bit rusty (surface rust) when I pulled it so cleaned it, took a wire wheel to it, and primed+painted it. Although I made sure to completely seal it off before doing any of that, I taped off the fuel openings and vaccum opening, and I put 1 of those clear adhesive rubber bumpers into each fuel injector well - they're the perfect size. Afterwards you can use a drywall screw to get them out.

[mattjewell]

Well for only $54 it may not be a bad idea to replace it. I know the injectors come with the o-rings already installed, but what about the rail? What o-rings will I need for the rail?

[BMWManiac]

From my experience, there are only two places that you'll find a leak in the rail:

1) The injector is not seated properly or the seal is installed dry and tears when installed into the rail itself

2) The thin arm that connects the fuel line to the fuel rail has a crack because someone stressed it enough, maybe trying to bend it out of the way

[mattjewell]

Yup! That's the plan.

Is it a possibility that the fuel rail itself is leaking? Does it make more sense to replace injectors and the fuel hoses, opposed to buying a whole new rail?

[jayuuey]

+1 on MEPEH. Just buy a reconditioned set and then send your old ones back after install.

[mattjewell]

you probably don't need new injectors, just get yours professionally cleaned. I got mine done by MEPEH, did a great job; $5/injector includes the cleaning + new seals + new pintle caps
http://www.r3vlimited.com/board/showthread.php?t=266477

PMd him too. Good looking out

[turbo55]

you probably don't need new injectors, just get yours professionally cleaned. I got mine done by MEPEH, did a great job; $5/injector includes the cleaning + new seals + new pintle caps

http://www.r3vlimited.com/board/showthread.php?t=266477

[BMWManiac]

Go to NAPA and buy fuel injector hose (I forget about how many meters you need, maybe 3?) and injector o-rings.....you don't need to buy these online

[mattjewell]

So here are the parts I'm going to order:

FPR: http://www.ecstuning.com/BMW-E30-325...uel/ES2226058/

Fuel rail: http://www.ecstuning.com/BMW-E30-325.../Fuel/ES33524/

Fuel filter: http://www.ecstuning.com/BMW-E30-325...uel/ES2706648/

Any recommendations on hoses to buy?

O-rings? If I'm buying re built injectors, what O-rings will I need?

[BMWManiac]

I'm sure he does and wouldn't be a bad idea to charge a "core" charge until he gets yours