V10 piston slap
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V10 piston slap
after this darn hurricane went through down here, our temperature went from 88 on sunday to 45 this morning. big change, and once again, i have that ticking noise on startup. i posted awhile back about a ticking noise when i start the V10 up on cold mornings. it lasts maybe 2 minutes then goes away. lots of you told me it might be a sparkplug ready to fly. so i changed them and toqued correctly. but it sounds to me like the old pushrod engines that had lifter noise. this only happens in cold weather starts and goes away by itself. i thought i remembered awhile back someone with a thread on piston slap. anyone have any ideas? thanks, matt
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Joined: Jun 2003
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From: NE Texas
Matt,
I have had that "slap" since new. I can only guess that it affects the engine like the old "wrist pin tap" on the FE engines - which was none to speak of.
Many folks here have it and, like myself, have gotten used to it...or at least realize that it doesn't hurt anything. It's hard to say when you can't listen to another person's engine, but mine is barely audible anyway, but I know its there. It goes away sometimes in 15 seconds and sometimes last as long as 2 minutes, depending on the temps.
IMO, I wouldn't worry about it.
I have had that "slap" since new. I can only guess that it affects the engine like the old "wrist pin tap" on the FE engines - which was none to speak of.
Many folks here have it and, like myself, have gotten used to it...or at least realize that it doesn't hurt anything. It's hard to say when you can't listen to another person's engine, but mine is barely audible anyway, but I know its there. It goes away sometimes in 15 seconds and sometimes last as long as 2 minutes, depending on the temps.
IMO, I wouldn't worry about it.
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Joined: Mar 2002
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From: Vancouver Wash USA
Originally Posted by 10strokin
after this darn hurricane went through down here, our temperature went from 88 on sunday to 45 this morning. big change, and once again, i have that ticking noise on startup. i posted awhile back about a ticking noise when i start the V10 up on cold mornings. it lasts maybe 2 minutes then goes away. lots of you told me it might be a sparkplug ready to fly. so i changed them and toqued correctly. but it sounds to me like the old pushrod engines that had lifter noise. this only happens in cold weather starts and goes away by itself. i thought i remembered awhile back someone with a thread on piston slap. anyone have any ideas? thanks, matt
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Joined: Jun 2003
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From: NE Texas
Originally Posted by ken04
Sometimes I wish it wouldn't start instantly, so I could spin the motor with the starter for a bit, to get oil pressure built up. But such is life.
I can hear it now...
Caller: Yes, I have a Ford Triton V10. What can I do to make it to where it won't crank. I don't want it to crank right away.
Tech: Excuse me?
Caller: It cranks too easy and I don't want it to. I want it to spin over for awhile.
Tech: I...don't...understand.
Caller: Oh, forget it!
LOL!
Last edited by Big Orn; Oct 25, 2005 at 10:07 AM.
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My 05 always takes about a 2 second crank to start, hot or cold and other 3 valve owners say the same. I am used to it now but all my older Ford Gas V8s always started without you ever hearing the engine crank.
I wonder why the new 3Valve has to turn over that long?
On the other hand it starts up in high idle very smooth and very quiet,
hot or cold and even after sitting for 4 days.
I wonder why the new 3Valve has to turn over that long?
On the other hand it starts up in high idle very smooth and very quiet,
hot or cold and even after sitting for 4 days.
Last edited by Wrenchtraveller; Oct 26, 2005 at 04:14 PM.
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Joined: Nov 2004
Posts: 7,988
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From: north west new jersey
mines the same way.probibly due to all the sensers that have to tell the pcm what to do.
since it always starts the same way , cranks the same amount of time hot or cold i leave it alone. now as i think about it so did all the newer vw's i worked on 2 or 3 second crank
since it always starts the same way , cranks the same amount of time hot or cold i leave it alone. now as i think about it so did all the newer vw's i worked on 2 or 3 second crank
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Senior User
Joined: Jul 2004
Posts: 425
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From: Park Ridge, Illinois
Mine too. It seems to start a tad quicker when I allow the computer to boot up by waiting until the idiot lights go off before turning the ignition.
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From: Long Island USA
Does the fly-by-wire throttle still have an IAC on the side of the throttle body, or does the computer just crank open the butterfly? That might be the reason for the delay... Although it sounds like the manufacturers want some "pre-lube" - maybe that way, the piston slap isn't noticable ... 
My '97 Cougar 4.6L ticks when it gets cold out, but randomly - it doesn't always do it - it also has the piston slap sometimes... the tick is related to it...
If I beat the snot out of the car for 15 minutes, running up the RPMs a lot, the tick goes away for months... so does the piston slap...
My '97 Cougar 4.6L ticks when it gets cold out, but randomly - it doesn't always do it - it also has the piston slap sometimes... the tick is related to it...
If I beat the snot out of the car for 15 minutes, running up the RPMs a lot, the tick goes away for months... so does the piston slap...
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Joined: Jun 2003
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From: NE Texas
Originally Posted by krewat
Does the fly-by-wire throttle still have an IAC on the side of the throttle body, or does the computer just crank open the butterfly? That might be the reason for the delay... Although it sounds like the manufacturers want some "pre-lube" - maybe that way, the piston slap isn't noticable ...
My '97 Cougar 4.6L ticks when it gets cold out, but randomly - it doesn't always do it - it also has the piston slap sometimes... the tick is related to it...
If I beat the snot out of the car for 15 minutes, running up the RPMs a lot, the tick goes away for months... so does the piston slap...
My '97 Cougar 4.6L ticks when it gets cold out, but randomly - it doesn't always do it - it also has the piston slap sometimes... the tick is related to it...
If I beat the snot out of the car for 15 minutes, running up the RPMs a lot, the tick goes away for months... so does the piston slap...
Just curious...
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From: Long Island USA
Originally Posted by Big Orn
So basically, what you're telling us Art is that you force-feed the tick and slap some sorely-needed oil? Reckon why?
Just curious...
Just curious...
It works. The tick goes away if I beat on it enough - I kinda wonder if it's really a lazy lifter (hydraulic lash adjuster)
Post Fiend
Joined: Jun 2003
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From: NE Texas
Originally Posted by krewat
Dunno...
It works. The tick goes away if I beat on it enough - I kinda wonder if it's really a lazy lifter (hydraulic lash adjuster)
It works. The tick goes away if I beat on it enough - I kinda wonder if it's really a lazy lifter (hydraulic lash adjuster)
And we did call it "force-feeding"
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Joined: Apr 2000
Posts: 355
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From: Central Pennsylvania
I was doing some research on engine replacements. Jasper uses graphite coated walls on their pistons in their v10 rebuilds. Perhaps this is to help remedy the piston slap problem or to make an engine with piston slap last as long as possilble. Or perhaps they use them on all their rebuilds as I didn't check out that idea... ?
Tony
Tony