leaking fuel rail

[Donovan1980]

I replaced one of my o rings on my fuel rail and now the back one is leaking. When I replaced it I took out 2 of the 4 bots on the intake and put the new o ring on. I am I missing something here? Should I pull all four bolts and reseat the rail?

[cornfedbill]

Is the leak at the injector to rail O-ring?

If so, you may have disturbed another injector O-ring in the process. I would remove the rail and then the injectors. Check and clean everything. Replace any hard or worn O-rings.

There may be some dirt that is now between the O-ring and the injector rail cup sealing surface.

[Donovan1980]

Is the leak at the injector to rail O-ring?

If so, you may have disturbed another injector O-ring in the process. I would remove the rail and then the injectors. Check and clean everything. Replace any hard or worn O-rings.

There may be some dirt that is now between the O-ring and the injector rail cup sealing surface.

Its leaking at the rail to injector in bolting back down the rail is there any pattern that they should be bolted back down in?

[MrForce]

New O-rings are available at most parts houses. they are cheap insurance. If you are in a pinch switch the O-rings from bottom to top, using the best ones at the top. Fuel rail pressure is harder on them then vacuum/boost. Vaseline is the best lubricant to prevent from damage on install.

Rob

[cornfedbill]

New O-rings are available at most parts houses. they are cheap insurance. If you are in a pinch switch the O-rings from bottom to top, using the best ones at the top. Fuel rail pressure is harder on them then vacuum/boost. Vaseline is the best lubricant to prevent from damage on install.

Rob

Rob is correct. Use Vaseline. That's what we used in the test lab when I was an engineer at Bosch.

Take the rail assembly off. Remove all the injectors to inspect the O-rings. Make sure they are clean and in good shape. It would be best to replace them. Coat them with a thin layer of Vasaline. Install all the injectors into the rail. Then install the assembly into the intake making sure to press it straight. When it is already installed, install the bolts. I would not suggest pulling the rail into place with the bolts. If you do, you run the risk of pulling it down unevenly again.