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New engine and i still have a knocking!! what is it!?!?!
Ok so i have an 05 f150 5.4 v8 super crew cab and i bought it for 3000 because of a cracked block. I bought a re-manufactured engine and installed it and now i have a knocking that wont go away. after i started it up it sounded beautiful for about 10 mins and then i had a knocking start up. i have put about 30 miles on the new engine and still have the knocking. i let it sit over night and i started it up and there was no knocking so i drove about 3 miles to the gas station and by the time i got there the knocking was back. it runs fine no other issues but why do i have this knocking with a new engine.
Please help me!
It's comming from the valve train and it is only at idle and a little above but it goes away at high rpm but like I said. When it is cold it does not have a knock but about 2-3 mins in it will start knocking.
Start looking into VCT system, there are many right ups on this issue as it is common in these engines. There are steps you can follow to narrow the sound down. Search for cam phasers, or VCT solenoid. This should get you started on the right track.
02-05-2012, 04:14 PM
