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HDGENE, Ford Senior Master/Diesel/Trans
Category: Ford
Satisfied Customers: 5517
Experience:  25 years Auto experience, Ford ,GM, Chrysler, Asian & European
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We removed the oil pan tonight after changing phasers

Customer Question

We removed the oil pan tonight after changing phasers tensioners and guided to find a excessive amount of front to back movement in the crank I removed the rear main and thrust bearing only to find little to no wear in the bearings where is the play coming
from ? Do you think I can replace the oil pump and get another year out of my truck it's dropping oil pressure after motor warms up like 25 mind of driving dropping to 15-20 psi causing phaser knocking
Submitted: 2 years ago.
Category: Ford
Customer: replied 2 years ago.
2005 f150 5.4 200000 kms
Expert:  HDGENE replied 2 years ago.
There has to be some wear in the thrust bearing since that controls endplay. You can replace the engine bearings meains and rods to build additional pressure
Customer: replied 2 years ago.
There wasn't even a consistant wear ring on the bearings showed and measured little to no wear had engine builder look at them and he felt they were more then fine what else could cause the movement ? And do you think it's worth putting a new high volume oil pump on it
Expert:  HDGENE replied 2 years ago.
Did you plastigauge the bearing clearance between the caps and crank? Are you sure its not the harmonic balance itself that is moving? How much endplay do you have. More than .010 of an inch
Customer: replied 2 years ago.
Much more like 1/32 of an inch+ we never plastiguaged them but certain it's not the balancer prayed off a crank lobe
Expert:  HDGENE replied 2 years ago.
Do you have a picture of the thrust washer bearing? Thats the only thing that governs crank movement
Customer: replied 2 years ago.
I agree but no I don't have a pic but I swear I had and engine builder look at it and he said it had little to no wear we are all confused as to where the play is coming from were little to no shavings in the oil pan
Expert:  HDGENE replied 2 years ago. The link above talks about torque convertor ballooning causing thrust bearing wear. That is the most common cause for a loss of oil pressure unless there is wear in the main bearing cap itself that the thrust bearing saddles into
Customer: replied 2 years ago.
That post didn't realy tell me anything there is only 3 thrust bearing right? On the rear main the post said 4
Expert:  HDGENE replied 2 years ago.
Yes two upper and one lower on the number 5 rear main bearing cap
Customer: replied 2 years ago.
Your thoughts on a new oil pump? Bearings show no songs of wear
Expert:  HDGENE replied 2 years ago.
You can replace the pump but that does not governs endplay
Customer: replied 2 years ago.
I know that but do you think it would bring the oil pressure back up the bearings all looked great shouldn't be losing pressure there
Expert:  HDGENE replied 2 years ago.
Yes a new pump will put out more pressure