loud knock noise - Ford Powerstroke Diesel Forum
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Old 06-23-2019, 09:10 PM Thread Starter
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loud knock noise

I just got auction 2010 f250 and the engine has loud knock on idle. Looks like previous owner neglected to do oil changes and caused loud knock. The engine is fully deleted. I wonder what is best way to diagnose the issue? Would bad lifters give loud knock noise ? What else could be wrong with it ? What cost to replace lifters?
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Old 06-23-2019, 09:23 PM
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It may be a natural sound as well. Ford did release a TSB about a tapping sound for the 6.4. If it disappears with speed then it’s common. Rocker arms can typically be heard as a “popcorn” coming from intake.
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Old 06-24-2019, 02:01 PM
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Here is the TSB.

For this sort of problem, making a video so that we can hear the knock may be your best plan of action. Given your post count, your best bet is probably uploading it to YouTube and then posting a link that is slightly disguised.

Ex: w w w . you tube . com/ XuiR5E8 (remove the spaces).
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File Type: pdf 2012-08-14_061126_2008_ford_f-350_super_duty_engine_noise.pdf (65.3 KB, 40 views)
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2004 F550 CC Lariat
BPD oil cooler relocation and upgraded EGR cooler (spooled), BPD oil bypass filtration, aFe Magnum Force CAI, Mishi radiator, 7.3L fan clutch, EC1 ELC, XDP coolant bypass filtration, '08 trans pan/filter, PTP direct clutch solenoid, blue spring, 6.4 starter, MBRP y-pipe, BD boots/clamps, '05 intake elbow, ccv reroute, Torque Pro + OBDLink™ LX, Autometer EGT
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