Edmunds.com | Inside Line | Auto Observer Your Account | Help | Directory
You are here:
![[F]](http://a332.g.akamai.net/f/332/936/12h/www.edmunds.com/media/townhall/webxicons/site.gif){kind=small}
Forums
Pickups Toyota Tundra Toyota Tundra New Owner Reports
1963 messages, Last post on Jul 07, 2009 at 8:51 AM
You are in the Toyota Tundra Forum. Your Host is kcram
The noise that 75% of 5.7 liter engine owners hear for a few minutes after startup is piston slap plain and simple. It is impossible to say without testing and inspection what is causing the slap. It could be the cylinder(s) or piston(s) are out of tolerance. The piston or block could have a manufacturing defect. The piston or block could be poorly engineered. I am sure Toyota knows because the TMC regional rep admitted to me  they no longer build the engines like they did in 07 & 08. Typically, a loose piston (if not broken) causes excessive wear of the piston and cylinder wall resulting in increased blowby. This in turn exacerbates the problem further because the loose piston cannot transfer heat to the cylinder adequately. What you have is an engine that, providing something doesn't actually break, wears out much earlier than it should. In a State where smog inspections are done it much more likely that the vehicle will fail the emissions test long before it should have, not to mention degraded performance. Toyota no doubt takes the stand that as long as it lasts at least 100,000 miles, the length of the extended warranty, then who cares. One of the reasons we all bought a Toyota was the reputation of their products for durability which equates to resale value. That expectation no longer applies to the 07 & 08 trucks not only because something is wrong with them but because TMC has not the honor to fully admit the problem and fix it. I am exploring the potential for legal action as this problem is becoming widely recognized in many forums across the Internet and it is time for Tundra owners to get some satisfaction from the manufacturer with respect to repairs and warranty coverage of this issue. The owners of the 3.0 liter T-100s and Tacomas with cast iron blocks and aluminum heads that all had bad head gaskets were ignored until they resorted to legal action. Toyota finally replaced all the head gaskets but unfortunately trucks with those engines are now almost worthless because everyone knows you can't keep a head gasket in one. Is that the future of our 07 & 08 5.7 liter Tundras?
|
|
|
Replying to: kl67 (Apr 10, 2008 7:31 am) It take at least 15 mintues of driving to get the knock out . Sounds like a diesel Please if you could email me at : msportraits  salsburystudio.com then I can discuss this with your dealer |
|
|
Replying to: kl67 (Mar 17, 2008 5:57 am) Can you tell ne the name of the dealer ( and address or were it is ) that replaced your engine on your 5.7 L . My dealer just says " its normal " . It take at least 15 mintues of driving to get the knock out . Sounds like a diesel Please if you could email me at : msportraits salsburystudio.com then I can discuss this with your dealer |
|
|
Replying to: kl67 (Feb 21, 2008 8:18 am) My dealer just says the engine knock (the diesel sound that last at least 15 minutes or more before it quiets down but does not go away ) they say " its normal " I even listened to my neibours tundra and his does not do that
|
|
|
Replying to: Mojaveman (Jan 24, 2009 7:54 pm) Chevrolet, Ford, Dodge, Isuzu, Internationals, Freightliners? others? how many individuals do you think will not purchase remaining 2008s after reading this discussion/ being educated by toyota engineers as to what is progress of investigation / transparency / open dialogue, is this a sticker for purchase, resale values, detriment to investments for the stockholders? it is design / manufacturing / engineering / or business problem? why does it happen on some as opposed to others? what type diagnostics are needed to discern this problem on others that may have not heard? Do the vehicles in question have similarity ,,time date manufactured? one run two runs,,what type numbers quanify recall? reason for lower prices in Texas? discounts showing tundratalk.net 21.56% to 26% realcartips.com will the discount grow greater as time wanes on? will anyone purchase 2009s 2010s for fear that the problem will manifest without follow up? a potential custome wants to know these things in advance, having nvever worked with toyota before. what has changed with Toyota and spirit of excellence? |
|
|
Replying to: msalsbury (Jan 28, 2009 7:51 am) What after the 100,000 mile mark with noise issue being detected prior to 100,000 mile mark>>#1 customer inquiries, #1001 customer inquiries Toyota will Replace Engine with other associated mechanics problems all in Good Faith at What Cost to Consumer? at What Cost to Stockholder? $20k turning into $40k actual cost of vehicle to be determined? Cost benefit Ratio How many actually will notice? How many will actually contact Dealer? How many will actually know that this is Toyota's problem and not consumer? Did you change your oil? Did you change your transmission? You had work done to vehicle outside the Dealership? Does this void the warranty? Free of charge , to consumer, parts and labor ,,handshake,,Moving Forward |
|
I'm sorry but those are two of the most unintelligible posts I've ever seen. What language are they written in?
|
|
|
Replying to: kdhspyder (Jan 29, 2009 7:33 am) with piston slap engine noise damage, are isolated issues this group seems to be very consistent alot more toyota messages than other brands possibly someone know s 2007 2008 5.7L owners who do have 100k miles on truck ,,extra ordinary but perhaps uncle friend neighbor, person work mechanic who works on american vs japanese tundra 5.7Liters what is the response of driver with mulitiple miles behind wheel of newer engine,,short piston? |
|
Anyone comparing the head gasket issues on an older 3.0 liter V6 to the 5.7 liter V8 is confused or not mechanically inclined. The 3 liter V6 was a cast iron block with alum. heads. The 5.7 liter V8 is a alum. block/ alum. head construction. The reason the 3 liter would pop a head gasket was due to the difference in heating (expansion) and cooling (contraction) characteristics/timing of the two different metals. The engine knocking on the 5.7 liter V8 is due to the use of short piston skirts. As I have previously stated in a past posting. Most auto. manufactures use this technology on ALL their cars. You will hear the same exact "piston slap" on a new Nissan or Dodge for that matter. Granted the Dodge would probably slap due to poor build quality.  There will be no long term adverse effects caused by the use of this technology when the engine has been built properly. I am positive given Toyota's racing heritage and high build quality that the 5.7 liter is built to last. You can talk about wear to the cylinder walls and piston rings all day long. The fact is that all vehicles have a small gap between the pistons and the cylinder walls and the pistons by nature (if you will) are going to rock (slightly) back and forth due to the fuel/air mixture igniting. (during the power stroke) Some are just moe audible than others. If anyone thinks there is going to be blow-by due to the slight rocking of the pistons, they are wrong. Blow-by is caused by excessive wear of the piston rings or worn valve seats and so forth. Short skirt pistons are designed to lighten the weight of the piston and are coated with DLC or diamond like coating on the skirts themselves were they make contact with the iron cylinder sleeves. This coating is like Teflon on the skirts and is extremely slippery. It lessens the wear of the cylinder wall and pistons by adding an additional "lubricant" to the internal items of the engine there by increasing fuel efficiency while lessening stress on the moving internals of the engine. If someone were to disassemble a 5.7 liter in front of you, you could then see with your own eyes the construction and how smart it is. Especially if you were to have an engineer on hand to explain the various components and their function. 
|
|
|
Replying to: 1972ck (Jan 30, 2009 9:53 am)
|
|
You are here:
Forums
Pickups Toyota Tundra Toyota Tundra New Owner Reports
New? Join Now!
Forum Tools
Search Forums
Browse by Vehicle
2010 Toyota Tundra
Browse by Board
Browse by Topic
Today's Chats
