Knocking for a second at startup
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Mountain Pass
Joined: Nov 2003
Posts: 157
Likes: 1
Knocking for a second at startup
I have a 2004 V10 F350, and if I have not started it for awhile like a week or so, I hear a quick knocking sound right when it starts up. You know when you start the engine it quickly rpm's while it warms up. Right when the engine fires over, I hear that quick knocking sound. It only happens in the morning or after it has sat for a while. could it be because the oil is all down in the pan, or maybe because I should start it more than I do. Just wondering if anybody else has this happening, and it is just a V10 thing. The truck is new, and only has 5,000 miles on it. Let me know what you guys think. Maybe I'm just tripping out.
Junior User
Joined: Apr 2004
Posts: 66
Likes: 0
Sounds like a little piston slappin goin on, I agree with tracman take her in asap and have em look at it, You may want to get an oil analysis done before you drain that oil out. BTW my LS-1 has done the same thing since 2000 miles, hasent caused any problems but I wonder whats going on in the bore wall.
Cargo Master
Joined: Apr 2003
Posts: 2,059
Likes: 426
From: Too close to Houston
I think HeavyAssult is right. Try installing a new motorcraft oil filter (an 820S, I believe). I think the anti-drainback valve in yours is allowing the oil to run back into the engine when you shut down. You're hearing valvetrain noises as the system pumps up. I tried a Fram filter once (only once!) with the same result.
Senior User
Joined: May 2003
Posts: 481
Likes: 0
From: St. Petersburg, FL
All V-10's do that. It's quite common and most dealers won't spend even a minute on it anymore. Mine won't.
I posted the same thing a little while ago and the consensus was not to worry about it.
I posted the same thing a little while ago and the consensus was not to worry about it.
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Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
Originally Posted by Baja Daze
All V-10's do that. It's quite common and most dealers won't spend even a minute on it anymore. Mine won't.
I posted the same thing a little while ago and the consensus was not to worry about it.
I posted the same thing a little while ago and the consensus was not to worry about it.
And, they are just alike (my dad and son) HARD on an engine! My dad's engine has 147K no probs - my son's 88K no probs.
BTW - I have the V10 "piston slap" and no problems to date: '99 SD F350 DRW with almost 90K miles.
Hmm - thought they would have at least toned it down some by now?
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Senior User
Joined: Jan 2004
Posts: 183
Likes: 0
From: Michigan
I had a 2001 with the v10, and now a 2003 v10 and when I ran a Fram filter and RP oil ( 10-40 I think) I had the same noise, I changed to the ford filter and 5-30 mob1 and it is gone ! I used redline or RP in my Mopar cars and fram filters, but not in my V10s or my 4.6 mustang. 
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