5.4 2008 Bottom End Knock
#1
5.4 2008 Bottom End Knock
Hi
My truck has recently developed a bottom end knock .... You almost can not hear it from engine compartment but can from the cab/behind front wheels.
The knock goes away about 2200rpms. The knock is worse for the first 5 seconds or so after starting(kinda makes me thing oil pressure). The engine runs smooth and makes good power.
Disconnecting VCT= no difference. Flex plate looks good from inspection plate. Exhaust studs look good.
5w20 motorcraft oil and filter look good.
Any suggestions on path to diagnosing this problem?
2008 F-250 5.4L
My truck has recently developed a bottom end knock .... You almost can not hear it from engine compartment but can from the cab/behind front wheels.
The knock goes away about 2200rpms. The knock is worse for the first 5 seconds or so after starting(kinda makes me thing oil pressure). The engine runs smooth and makes good power.
Disconnecting VCT= no difference. Flex plate looks good from inspection plate. Exhaust studs look good.
5w20 motorcraft oil and filter look good.
Any suggestions on path to diagnosing this problem?
2008 F-250 5.4L
#2
#3
Any chunk of wood will work as a "stethoscope" a short piece of broom handle is what i use, makes it easier to place and listen to isolate a sound source