high pressure oil pump
high pressure oil pump
Former Vendor
Joined: Mar 2004
Posts: 4,362
Likes: 3
From: Hendersonville, NC
Originally Posted by satcom40
Can oil flow thur the High pressure oil pump when the engine is not running, thur the high pressure rail back to the oil pan. Thanks John
The rail is check-valved and cannot leak back; the pump reservoir and pump plumbing is also sealed so that motion has stopped, it has nowhere to drain back to.
Is there a reason you ask this? Truck taking longer periods of time to crank, ect?
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Elder User
Joined: Oct 2004
Posts: 585
Likes: 1
From: Ct.
NO the engine is running great. I was thinking that I running fresh oil thur my Luber and Flash out the the Qt of oil still in the engine. The only problem with my truck is the front end 60 K and need four new balljoints. I vented over in the Super Duty forum,
New User
Joined: Nov 2006
Posts: 5
Likes: 0
From: hayden,idaho
no. the high pressure oil system is a closed system. It is designed not to bleed down with the engine off. the injectors hold the oil on one end and the pump has a control solenoid on the other end that holds the oil on the other end. the system is like holding your thumb on top of a straw. the liquid in the straw will stay in the straw even if you pull the straw out of the glass of water. the high pressure oil system would only leak if there was a problem. A typical symptom would be a long crank time.
Former Vendor
Joined: Mar 2004
Posts: 4,362
Likes: 3
From: Hendersonville, NC
Originally Posted by satcom40
NO the engine is running great. I was thinking that I running fresh oil thur my Luber and Flash out the the Qt of oil still in the engine. The only problem with my truck is the front end 60 K and need four new balljoints. I vented over in the Super Duty forum,
Postmaster
Joined: Jun 2006
Posts: 2,799
Likes: 1
Originally Posted by PSD 60L Fx4
Without removing the oil cooler and installing a fitting to do so, there is no way to pump into or out of the system. Even if you did that, it would still never get to the oil that was in the upper end of the rails.
Only problem is, it takes a bit longer than the usual oil change.
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Elder User
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From: Ct.
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