Setup:
Would you attempt to (without the engine running) push hi pressure water (from a pretty powerful garden hose) through the fuel cooler to clear it out? Should I be concerned that water might get past the o-rings in the cooler and mess up the fuel system?
-or-
Bite the bullet and take the fuel cell apart and clear it out? (I'm assuming its do this)
If so, is it as simple as removing the pumps/filter and soaking all the remaining parts in gas for a while? I’m assuming besides the pumps and filter, all remaining parts are good for an overnight dunking. Hit the screen w/ compressed air or some throttle body cleaner.
What thread sealant do you use to put on the fittings going into the fuel cell, and the high pressure lines to the engine when I reconnect?
Can someone provide the exact listing for the all the O-rings needed to overhaul the fuel cell and replace the ones on the pump? I’ve seen a few posts, but some folks are vague and guessing. A rec on who to order from would be dynamite too.
Should I use silicone grease when applying new o-rings to all parts in the fuel cell, as well as the fuel reg, and the injectors if I pull them for service?
I have 500+ hours on the engine, I’m thinking about cleaning the entire fuel system as well. Is it as easy as pulling the rail, soaking it in gas, and sending out the injectors to be cleaned?
After subjecting the hi pressure pump to these grueling loads, and then if I successfully return the load to spec, can we assume the pump will have a reasonable amount of service life left? Or am I playing with fire?
Finally, Is 12 years to have a Penta fuel pump without a total failure a stroke of luck, and don’t mess around with an overhaul/rebuild and just get a new one?
- 2004 5.7gxi-F 3869260 4012119425 Duoprop
- 530 hours on the block (heavy overhaul as the engine was partially submerged during Hurricane Sandy.. Most parts new, but fuel cell original)
- Used in brackish water
- Religiously run engine with fresh water after every use.
- Terrible fuel economy
- Starting to feel more sluggish between 3500-4000
- Occasional hi pressure pump whine heard during idle (low pressure seems cool)
- Long idle times the hi pressure pump gets hot, and the insulation is actually starting to melt near connection harness. Have ceased operating boat until I can resolve.
- Despite clearing both the water intake from the t-stat and the output from the fuel cooler to the riser, when hooked up to the engine.. Water is not passing through the fuel cooling jacket (assume scaled/salted up)
- Test fuel pressure (will likely confirm the hi-side at the rail is way out spec causing the hi pressure pump load to be excessive)
- Remove/clean out the the fuel regulator (leave screen in, don't plan on using e-clip right now)
- Test hi pressure again.. If it’s in check, then hopefully the hi-pump starts operating normally.
- If things function normally, I still need to flush out the water jacket on the fuel cooler.
Would you attempt to (without the engine running) push hi pressure water (from a pretty powerful garden hose) through the fuel cooler to clear it out? Should I be concerned that water might get past the o-rings in the cooler and mess up the fuel system?
-or-
Bite the bullet and take the fuel cell apart and clear it out? (I'm assuming its do this)
If so, is it as simple as removing the pumps/filter and soaking all the remaining parts in gas for a while? I’m assuming besides the pumps and filter, all remaining parts are good for an overnight dunking. Hit the screen w/ compressed air or some throttle body cleaner.
What thread sealant do you use to put on the fittings going into the fuel cell, and the high pressure lines to the engine when I reconnect?
Can someone provide the exact listing for the all the O-rings needed to overhaul the fuel cell and replace the ones on the pump? I’ve seen a few posts, but some folks are vague and guessing. A rec on who to order from would be dynamite too.
Should I use silicone grease when applying new o-rings to all parts in the fuel cell, as well as the fuel reg, and the injectors if I pull them for service?
I have 500+ hours on the engine, I’m thinking about cleaning the entire fuel system as well. Is it as easy as pulling the rail, soaking it in gas, and sending out the injectors to be cleaned?
After subjecting the hi pressure pump to these grueling loads, and then if I successfully return the load to spec, can we assume the pump will have a reasonable amount of service life left? Or am I playing with fire?
Finally, Is 12 years to have a Penta fuel pump without a total failure a stroke of luck, and don’t mess around with an overhaul/rebuild and just get a new one?