I have a 2000 V10 that has some engine noise at cold startup and will quiet down after you let it warm up about 10 minutes. Bust once it sits there for 10 minutes and I drive off the ticking noise comes back when you step on the gas and then goes away, then comes back and goes away. If I floor it from 10 mph to 40 mph it will usually go away. Thank you in advance.

 

It sounds what is widely accepted to be "piston slap". It's common to the V10 and mine has done it, not bad, since I got it. Some mornings are worse than others and sometimes it doesn't make a sound.

Another thing, if it's just a tick, is the injectors, which is normal.

Is it a slight knock or a tick?

 

In the mornings, I've noticed that I have a tap too. It normally goes away when the engine heats up to normal temperature. I thought it might be a lifter/valve tap or a manifold exhaust leak? 99 v10 regular cab long bed

 

It sounds like it might be both a knock and a tick, and it sounds like it is on the drivers side of the engine.

 

Yea, I have that too. Mine sounds like a tick...what the heck is that?

 

If it's a sort of a hollow, light knock, then it could be the piston slap noise - remember the wrist pin knock on the old FE engines? Sort of like that but not quite as definite and a little more hollow. It usually happens at startup after sitting all night, especially in cooler weather and when the oil is on the verge of needing changed, and usually goes away either on its own or after revving the engine. Hardly ever does it come back during the day (or trip, etc.)

The light tick could be an injector - which happens be okay, but some more pronounced than others.

Another tick could be the serpentine belt on its last leg or the idler pulley. In that case you can usually get a mechanics stethoscope (length of hose, piece of wood, or long screwdriver) and pinpoint it. You could also locate the ticking injector and/or the knock in the same way.

 

I Have A 2001 Excursion V10 With 51000 Miles. I Have The Same Problem During Cold Start Up. Slight Tapping Noise That Goes Away After A Few Minutes Of Driving Or Idle. Noise Comes Back After About A Half Hour Of Sitting While In A Store, Then Goes Away Again.

Once The Noise Is Gone I Can Step On The Gas And No Noise Under Full Acceleration. Engine Runs Great.

If Anyone Knows How To Get Rid Of Piston Slap Let Me Know.

I Use Mobile 1 Oil With Ford Filter.

 

I was curious to know what type of oil you use and how often you change it. Also, have you had an Oil Analysys performed yet? I have heard alot about this not just with V-10

 

The only way to get rid of piston slap is to rebuild the engine. And as Ford has not admitted it's a problem, it'll be on your dime. I have 101K on my V-10, it's always had piston slap although slightly lessened with Mobil1 10-30W. But it still runs like a SAAPE, so I ignore the noisy start-up now and went back to a lighter weight oil. Ken

 

I change my oil every 4000-5000 miles. Change with Mobil 1 Syn 5w-30.

 

what about if that same noise does not go away? is there something i should worry about?

i really want to make shure i have aproblem before i pay the dealer for a test drive?

 

If it is slap, the dealer most likely not render repairs. I had my 03 T/A LS1 borascoped for the same issue and we saw some cylinder scuffing. What the long term result will be who knows. If your concerned you may want to perform a IOL on the oil. look for high levels of specific metals, that may give you some leverage if you bring the report with you to the dealer. best of luck!

 

If the noise doesn't go away after the engine warms up it probably isn't piston slap. Check the oil level first, it sounds trite but most dealers have $5 an hour flunkies servicing used cars. Full time noise should be something else, describe the noise to the best of your ability please, Ken.

 

I'm with Ken on this one. I would make sure that it was a knock first before I got all exicted. I have a tranny clack in neutral that always gets my son worried I'm gonna throw a rod.
Determine, if you can, where it's coming from and describe the noise.

 

It's not piston slap, it's the valves that are ticking. Block is too big, and will need oil to rise. I think i'll invent something that'll take care of that problem. To the drawing board.