Engine sounds like its about to fall apart
#1
Engine sounds like its about to fall apart
2001 4.0 SOHC
When I start up the truck, especially when its cold, I get alot of clacking for a few sec, then it goes away. I can hear alot of just rattling when i'm idling especially if I'm next to a wall, or if another car pulls along side me.
I'll try and get a video of it in the next few days.
Any ideas?
When I start up the truck, especially when its cold, I get alot of clacking for a few sec, then it goes away. I can hear alot of just rattling when i'm idling especially if I'm next to a wall, or if another car pulls along side me.
I'll try and get a video of it in the next few days.
Any ideas?
#3
#5
#6
#7
It's one of two things. Either piston slap and/or the oil is not staying primed (valve in filter)
Now.. since you can hear it once it's warmed up.. I'd suggest that it's piston slap.
Step the oil up to a full synthetic 10w-30 and within 100 miles I'd bet the noise will be mostly gone.
Rich
Now.. since you can hear it once it's warmed up.. I'd suggest that it's piston slap.
Step the oil up to a full synthetic 10w-30 and within 100 miles I'd bet the noise will be mostly gone.
Rich
#8
your truck is an 01, i would say its the timing chain.
theres a TSB out for a few of the early year 4.0 sohc rangers and explorers.
rich could be right, but you said it does it even after it runs for a few minutes, so that doesn't sound right.
http://www.ford-trucks.com/forums/31...tle-noise.html
theres a TSB out for a few of the early year 4.0 sohc rangers and explorers.
rich could be right, but you said it does it even after it runs for a few minutes, so that doesn't sound right.
http://www.ford-trucks.com/forums/31...tle-noise.html
#9
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Originally Posted by wydopnthrtl
It's one of two things. Either piston slap and/or the oil is not staying primed (valve in filter)
Now.. since you can hear it once it's warmed up.. I'd suggest that it's piston slap.
Step the oil up to a full synthetic 10w-30 and within 100 miles I'd bet the noise will be mostly gone.
Rich
Now.. since you can hear it once it's warmed up.. I'd suggest that it's piston slap.
Step the oil up to a full synthetic 10w-30 and within 100 miles I'd bet the noise will be mostly gone.
Rich
#11
Originally Posted by 01xltranger4x4
Ouch, doesn't that cause gouges in the cylinder wall?
Piston slap in most modern engines is actually more a "perception" of the car than anything else. Now before you gear heads shoot me.... hear me out.
Pistons "slap" against the cylinder wall happens 100% of the time. The real problem point is when does it become objectionable to the owner? People want to draw a line in the sand and say it's when you hear it. Well.. you've always heard it. Especially you guys who have owned cars made in the 70s and earlier. The rest of the car was so noisy, and the oil used was thicker, such that you just never noticed it before.
The modern car is so quiet that now more subtle noises are becoming more and more noticable.
Just go with a slightly thicker oil and *if it's piston slap* your hearing? It'll mostly go away. Or technicaly speaking.. the noise frequency will go out of the range of your hearing.
Rich
#13
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Originally Posted by wydopnthrtl
Not really. That is unless its REAL BAD. But at that stage your about to loose the engine anyway.
Piston slap in most modern engines is actually more a "perception" of the car than anything else. Now before you gear heads shoot me.... hear me out.
Pistons "slap" against the cylinder wall happens 100% of the time. The real problem point is when does it become objectionable to the owner? People want to draw a line in the sand and say it's when you hear it. Well.. you've always heard it. Especially you guys who have owned cars made in the 70s and earlier. The rest of the car was so noisy, and the oil used was thicker, such that you just never noticed it before.
The modern car is so quiet that now more subtle noises are becoming more and more noticable.
Just go with a slightly thicker oil and *if it's piston slap* your hearing? It'll mostly go away. Or technicaly speaking.. the noise frequency will go out of the range of your hearing.
Rich
Piston slap in most modern engines is actually more a "perception" of the car than anything else. Now before you gear heads shoot me.... hear me out.
Pistons "slap" against the cylinder wall happens 100% of the time. The real problem point is when does it become objectionable to the owner? People want to draw a line in the sand and say it's when you hear it. Well.. you've always heard it. Especially you guys who have owned cars made in the 70s and earlier. The rest of the car was so noisy, and the oil used was thicker, such that you just never noticed it before.
The modern car is so quiet that now more subtle noises are becoming more and more noticable.
Just go with a slightly thicker oil and *if it's piston slap* your hearing? It'll mostly go away. Or technicaly speaking.. the noise frequency will go out of the range of your hearing.
Rich
www.pistonslap.com
#14
Like I said.. your about to loose the engine anyway if it's that bad.
Hearing "piston slap" is a completely relative noise. The noise is there all the time. As is injectors, valves, tappets, lifters, rod bearings, ect...
True piston slap is not a scuffing or scratching of the cylinder wall. If it's that bad your way beyond typically observed "piston slap".
The point that most people start hearing it is when you have about 0.004 clearance and the surfaces that are touching start a wear pattern. As the metal wears those patterns get bigger and bigger increasing the gap with every "slap". If the touching surfaces are very badly worn then you start to break the lip of the ring which then drags and scratches both parts.
btw, I found out about this whole relative noise issue on the protype design phase of the 96 taraus 3.0L duratech. Our water pumps were making all kinds of squeeks and squaks. We had a hard time figuring out what it was? Turned out that is was perfectly normal noise! We just had never had a production engine quiet enough to hear it before.
Going with a full synthetic and thicker oil will pretty much stop 95% of the wear because it creates a thicker and slicker film between the two parts. (piston and wall)
Rich
Hearing "piston slap" is a completely relative noise. The noise is there all the time. As is injectors, valves, tappets, lifters, rod bearings, ect...
True piston slap is not a scuffing or scratching of the cylinder wall. If it's that bad your way beyond typically observed "piston slap".
The point that most people start hearing it is when you have about 0.004 clearance and the surfaces that are touching start a wear pattern. As the metal wears those patterns get bigger and bigger increasing the gap with every "slap". If the touching surfaces are very badly worn then you start to break the lip of the ring which then drags and scratches both parts.
btw, I found out about this whole relative noise issue on the protype design phase of the 96 taraus 3.0L duratech. Our water pumps were making all kinds of squeeks and squaks. We had a hard time figuring out what it was? Turned out that is was perfectly normal noise! We just had never had a production engine quiet enough to hear it before.
Going with a full synthetic and thicker oil will pretty much stop 95% of the wear because it creates a thicker and slicker film between the two parts. (piston and wall)
Rich
Last edited by wydopnthrtl; 12-03-2007 at 03:01 PM.
#15
so its a really bad video and it didnt make the noise too much this morning but here it is. I'll try and take another one tonight after the truck has been sitting and its cold outside. Two nights ago it was about 44 and the truck sat for a while, sounded like the engine was about to fall out of the truck.
http://youtube.com/watch?v=zyH3xYQmTgU
http://youtube.com/watch?v=zyH3xYQmTgU
#17
#18
also, this morning i started it 3 or 4 times and kept hearing it
when I got back in after class I didnt hear it at all. Its usually only when cold that it makes the clacking noise, but it always rattles.
I've had the truck to ford for the timing chain and they never heard anything of course, and i'm out of warranty now. If i've already brought the truck into them for it would they still fix it from warranty?
when I got back in after class I didnt hear it at all. Its usually only when cold that it makes the clacking noise, but it always rattles.
I've had the truck to ford for the timing chain and they never heard anything of course, and i'm out of warranty now. If i've already brought the truck into them for it would they still fix it from warranty?
#19
#20
Originally Posted by 5speedin2.3
my ex g/f's moms expo did the same thing when you started it, started at about 80k.
ford had a problem with the chain tensioner, your not the first person to have this problem.
you have to pull the entire motor out to get to the rear chain, its a real pita.
ford had a problem with the chain tensioner, your not the first person to have this problem.
you have to pull the entire motor out to get to the rear chain, its a real pita.
#24