V-10 Tapping on startup...
Senior User
Joined: Sep 2002
Posts: 209
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From: Lowell USA
V-10 Tapping on startup...
I hear you - I like my V10 also - it may not be piston slap. My 99 did however sound like a lifter or you could also construe it to sound like the lifters hadn't pumped up yet on initial start (oil pressure not up). It was a surface noise (not a deep down noise like a road knock). Didn't last long (15 seconds) and didn't happen again all day once the truck was warmed up
The cure was no cure - tried everything - it still happened. Went the dealership route - no way they would replace an engine on a four year old truck - told me the slap was normal, just a loose engine and would run forever. They did tell me they would put it in writing that if the engine ever failed due to piston slap they would repair it free of charge and they doubled that coverage to cover the motor until 120,000 (for slap issues only however)
If it's slap dont worry - I guess thats the issue I'm putting forward. For anyone else in their warranty period, start documenting it.
Mike
The cure was no cure - tried everything - it still happened. Went the dealership route - no way they would replace an engine on a four year old truck - told me the slap was normal, just a loose engine and would run forever. They did tell me they would put it in writing that if the engine ever failed due to piston slap they would repair it free of charge and they doubled that coverage to cover the motor until 120,000 (for slap issues only however)
If it's slap dont worry - I guess thats the issue I'm putting forward. For anyone else in their warranty period, start documenting it.
Mike
Elder User
Joined: Feb 2003
Posts: 648
Likes: 1
V-10 Tapping on startup...
I have a 1992 Dodge Caravan with the 3.3L that does the same thing. I read a service bulletin that addressed the issue and it said that basically the engines were built with loose tolerances for increased economy ( fuel efficiency) and that it was a benign condition.
I also had a '90 S10 that had a louder 'knock' that was worse and lasted longer the colder it was. When it was warm, I couldn't really hear it. Turns out that engine was too 'loose' and it was replaced under warranty.
It seems that the latest practice in engine building is to build them loosely to be more efficient. It seems like this would contribute to a short service life, but maybe the improvements in metalurgy and oil formulation make up some of the difference.
Take Care
I also had a '90 S10 that had a louder 'knock' that was worse and lasted longer the colder it was. When it was warm, I couldn't really hear it. Turns out that engine was too 'loose' and it was replaced under warranty.
It seems that the latest practice in engine building is to build them loosely to be more efficient. It seems like this would contribute to a short service life, but maybe the improvements in metalurgy and oil formulation make up some of the difference.
Take Care
Posting Guru
Joined: Mar 2002
Posts: 2,245
Likes: 16
From: Vancouver Wash USA
V-10 Tapping on startup...
Originally posted by vze2372e
I hear you - I like my V10 also - it may not be piston slap. My 99 did however sound like a lifter or you could also construe it to sound like the lifters hadn't pumped up yet on initial start (oil pressure not up). It was a surface noise (not a deep down noise like a road knock). Didn't last long (15 seconds) and didn't happen again all day once the truck was warmed up
The cure was no cure - tried everything - it still happened. Went the dealership route - no way they would replace an engine on a four year old truck - told me the slap was normal, just a loose engine and would run forever. They did tell me they would put it in writing that if the engine ever failed due to piston slap they would repair it free of charge and they doubled that coverage to cover the motor until 120,000 (for slap issues only however)
If it's slap dont worry - I guess thats the issue I'm putting forward. For anyone else in their warranty period, start documenting it.
Mike
I hear you - I like my V10 also - it may not be piston slap. My 99 did however sound like a lifter or you could also construe it to sound like the lifters hadn't pumped up yet on initial start (oil pressure not up). It was a surface noise (not a deep down noise like a road knock). Didn't last long (15 seconds) and didn't happen again all day once the truck was warmed up
The cure was no cure - tried everything - it still happened. Went the dealership route - no way they would replace an engine on a four year old truck - told me the slap was normal, just a loose engine and would run forever. They did tell me they would put it in writing that if the engine ever failed due to piston slap they would repair it free of charge and they doubled that coverage to cover the motor until 120,000 (for slap issues only however)
If it's slap dont worry - I guess thats the issue I'm putting forward. For anyone else in their warranty period, start documenting it.
Mike
Senior User
Joined: May 2002
Posts: 312
Likes: 0
From: Oklahoma
V-10 Tapping on startup...
Okay, I've read tons and tons on this phenomenon called "piston slap" that we V10 owners seem to experience. My truck has it, two of my friends trucks have it. My question is, does this problem really do any REAL damage? Any documented cases of failures that can be traced back to piston slap? I've got 139,000 on my truck now, and it gets worked pretty hard at times, and I have had no problems at all. The noise is no worse now than it ever was, and lasts about 8 seconds on initial startup, and then I dont ever hear it again until the next day. Some days I dont hear it at all. I run Mobil 1 5W30 synthetic, changed every 3000 miles, and Motorcraft anti drainback filters, so there are no oil issues there. Since I have heard of no failures related to piston slap, I have to wonder if it is just more of an inconvenience or annoyance than it is a problem. Just my two cents worth though.
Last edited by airtractrdrivr; Jul 30, 2003 at 09:58 AM.
Posting Guru
Joined: Mar 2002
Posts: 2,245
Likes: 16
From: Vancouver Wash USA
V-10 Tapping on startup...
Originally posted by airtractrdrivr
Okay, I've read tons and tons on this phenomenon called "piston slap" that we V10 owners seem to experience. My truck has it, two of my friends trucks have it. My question is, does this problem really do any REAL damage? Any documented cases of failures that can be traced back to piston slap? I've got 139,000 on my truck now, and it gets worked pretty hard at times, and I have had no problems at all. The noise is no worse now than it ever was, and lasts about 8 seconds on initial startup, and then I dont ever hear it again until the next day. Some days I dont hear it at all. I run Mobil 1 5W30 synthetic, changed every 3000 miles, and Motorcraft anti drainback filters, so there are no oil issues there. Since I have heard of no failures related to piston slap, I have to wonder if it is just more of an inconvenience or annoyance than it is a problem. Just my two cents worth though.
Okay, I've read tons and tons on this phenomenon called "piston slap" that we V10 owners seem to experience. My truck has it, two of my friends trucks have it. My question is, does this problem really do any REAL damage? Any documented cases of failures that can be traced back to piston slap? I've got 139,000 on my truck now, and it gets worked pretty hard at times, and I have had no problems at all. The noise is no worse now than it ever was, and lasts about 8 seconds on initial startup, and then I dont ever hear it again until the next day. Some days I dont hear it at all. I run Mobil 1 5W30 synthetic, changed every 3000 miles, and Motorcraft anti drainback filters, so there are no oil issues there. Since I have heard of no failures related to piston slap, I have to wonder if it is just more of an inconvenience or annoyance than it is a problem. Just my two cents worth though.
Senior User
Joined: May 2002
Posts: 312
Likes: 0
From: Oklahoma
V-10 Tapping on startup...
I love my Diablo chip. I could definitely feel the difference when I put it in. Feels stronger throughout all areas of the power curve, PLUS got rid of that pesky speed limiter. As far as whether or not I would do it again with the economy like it is now, my answer is "probably so". I run 89 octane fuel with no problems, and where I live, it is only $1.58, so it's not too bad yet. I ran 91 octane when i first put in the chip, but one day I had to fill up and the 91 side of the pumps were all shut down. Took a chance and filled up with the 89, and it worked fine, so I've been using it ever since. But, with some other mods I am thinking of doing, IF I go ahead with them, I am probably going to have to switch over to a dual program chip like the Kenne Bell or the one that Diablo makes. But yeah, I would do it all basically the same again! It's too much fun not to!
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