2014 and newer Mechanical Fuel Pump

[pumpr64]

Wow, I guess not, that is a huge psi difference!! Just seems that the same could be accomplished with an external pump??

[foghorn23]

About a year ago I had a high pressure fuel pump failure on my 1 year old 5.3 GMC Denali.  An internal seal-at least that was what I was told- was allowing dumping of fuel into the crankcase.  The pump was replaced under warranty.

 

Details:

 

 

Obviously having large amounts of fuel in the crankcase is not good, but the truck seems to be fine and all has been well for about a year.  No oil usage or other issues.  Still there is a possibility of issues down the road.  Having gasoline on the bearings can't be good for anything.  Truck is leased and with this problem in it's history it will more than likely go back to GM at the end of its lease.