generic
New Member
- Joined
- Mar 25, 2009
- Messages
- 15
- Reaction score
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- Location
- Stillwater, OK
- Vehicle Year
- 1996
- Make / Model
- Ford
- Engine Size
- 4.0L V6
- Transmission
- Automatic
I'm replacing fuel rail gaskets and injector o-rings and am almost ready to reinstall the fuel rail, but there is a lot of grime and carbon build-up in the injector seats. Is there a way to clean them out without dumping the crud down into the manifold?
I don't have a shop vac and I wasn't able to get enough suction from the small tube I attempted to rig up to the household vacuum (almost smoked the motor, lol). What about a greasy rag on a stick (and what kind of grease)?
Or would the crud safely burn up in the cylinder and pass through the cat?
The pics are of probably the worst one of the 6 seats (same seat but shot from different angles). Not the best quality pics, most of the crud is carbon and located on the chamber-side of the seat, but there looks to be a few tiny grains of sand/grit on the seats (I did my best to blow the crap off the manifold before removing the injectors).
Also, is that amount of carbon normal at 150K miles? The injectors looked really good at both ends and only required a quick spray of intake/carb cleaner to brighten them up inside. Does carbon here mean I have leaky intake valve seats?
I don't have a shop vac and I wasn't able to get enough suction from the small tube I attempted to rig up to the household vacuum (almost smoked the motor, lol). What about a greasy rag on a stick (and what kind of grease)?
Or would the crud safely burn up in the cylinder and pass through the cat?
The pics are of probably the worst one of the 6 seats (same seat but shot from different angles). Not the best quality pics, most of the crud is carbon and located on the chamber-side of the seat, but there looks to be a few tiny grains of sand/grit on the seats (I did my best to blow the crap off the manifold before removing the injectors).
Also, is that amount of carbon normal at 150K miles? The injectors looked really good at both ends and only required a quick spray of intake/carb cleaner to brighten them up inside. Does carbon here mean I have leaky intake valve seats?
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