High Pressure Fuel Pressure Pump Timing

[sbcauto2012]

If I change the oring's on a 99 F-250 diesel high pressure fuel pump, how hard is it to time the fuel pump and how do you do it?

[sniper_101]

There is no HPFP on a 7.3.

You're going to have to clarify what O-rings you're talking about.

[dentexpowerstroke]

These motors aren't a 12v cumminGs, there is nothing to adjust timing on other than thru the pcm. I'm also curious at to what you changed the orings on.

[sbcauto2012]

I haven't done anything yet. The guy brought it in for a turbo rebuild, change the pedestal to non EBPV, and go ahead and change some of the orings. He said there was a fuel pump that had orings but had to be timed to go back together. I wasn't sure on this so I turned to the ORG before I touched it.


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[dentexpowerstroke]

The guy sounds like he has no clue what he's talking about. Fuel pump is on the frame rail, has nothing to do with timing. High pressure oil pump is spun off the timing gears, but you dont have to time it.

[sbcauto2012]

I was wondering but wanted to be clear on this. All there is to change as far as orings is the oil pump, fuel bowl, and pedestal? Is that correct?


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[dentexpowerstroke]

There are tons of orings on a 7.3, oil pump, fuel bowl, pedestal, and injectors are usually the common ones for people to change.

[sbcauto2012]

He's had the injectors changed. We're are doing the orings for the pedestal, fuel bowl, and oil pump.


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[hydroman]

Just be aware that there are two "oil pumps". One low pressure pump that feeds the engine itself, bearings, cylinders ETC. and the high pressure oil pump. HPOP is on top of the engine. It feeds high pressure oil to the injectors and it has the O-rings I assume you are talking about. I believe that the vendors on this and other sites have full instructions that come with the O-ring kits