Last post on Apr 01, 2013 at 9:58 AM
You are in the Toyota Tundra
What is this discussion about?
#1927 of 2007 survey 100K plus miles on newer Alabama 5.7Liter versus Japanese 5.7Liter
Jan 29, 2009 (9:54 am)
maybe the posters who have problems,
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?
#1928 of 2007 3 liter V6 vs. 5.7 liter V8
Jan 30, 2009 (10:53 am)
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.
#1929 of 2007 Re: 3 liter V6 vs. 5.7 liter V8 [1972ck]
Jan 30, 2009 (11:09 am)
I have a 2007 Toyota tundra crewmax 5.7 liter that runs perfect without any noise at all.my question is if all 5.7 are build the same why does some slap and some don't?
#1930 of 2007 Re: 3 liter V6 vs. 5.7 liter V8 [912money]
Jan 30, 2009 (1:27 pm)
Do you live in a climate where the temp.s stay below freezing from longer periods of time? When it is cold (er) ambient temperature outside the metals are "shrunk". Until the engine is up to normal operating temperature (180 degrees F) the pistons are "small" due to the metal confirguration (alloys used) as compared to the cylinder walls and sleeves. I had a 1987 4Runner with the bullet proof 22RE 4cyl. engine. That particular year had short piston skirts in it also. It would knock a little prior to engine warm up on colder days. I had a freeze plug rust out on the side of the engine block back in 2002 w/ the odometer showing 167k on it. I torn the engine down and there was no excessive wear on either the cylinder walls or piston skirts. I decided to check it out by removing the head and inspecting the everything internally while the engine is down for the freeze plugs to be replaced. Everything was well within spec.s and the rig ran great till it met it's final match against a moose. The moose won. The engine still ran great after the collision with the aforemention creature however the body panels looked like tin foil. Toyota manufactures everything the same and have very good quality control. They can tell very quickly when something is not right and have proceedures and measure in place the correct the problem quickly within the manufacturing process. That is why I do not believe their are a "batch" of unexplained extremely bad knocking 5.7 liters out there. That's not to say that Toyota is perfect and if somthing were to be manufactured incorrectly that it couldn't reach the consumer. There has been too many people in my humble opinion clammering about this non-existance "issue". If my 5.7 blows up then I'll have to eat humble pie. And I will be more than happy to report such a problem on this forum. Until then I will not believe that someone sitting behind a keyboard and monitor that can not prove they actually own a Tundra type possibly misleading things about the truck. Remember anybody with internet access can write what ever they'd like whether it be truthful or not. I have researched it because I do own a Tundra with the 5.7 liter and my knocks from time to time when it's cold. I have spoken with my local dealer, Regional Toyota Rep., friends or mine who own the exact same truck. They all say the same thing and I am very familar with engines built like the Tundra's 5.7 liter V8 due to my racing experience...in a former life.
#1931 of 2007 Re: 3 liter V6 vs. 5.7 liter V8 [1972ck]
Jan 30, 2009 (2:36 pm)
I live in the southern portion of Georgia and for the most part we have mild winters down here.But on some occasion the temp.will drop into the teens,but once again when I crank her up the temp inside the truck will show 17 to 18 degrees,with no piston noise,only the high idle that I've learned to live with.
#1932 of 2007 Re: CAN I get your dealers Name ... diesel sounding 5.7 [msalsbury]
Jan 30, 2009 (8:32 pm)
My tundra makes the same piston slap noise...not comforting for a new truck
Neither was the 4wd unit going out, while needed, in the snow.
Now there's an engine noise. This truck is junkier than the dodge I had! Who built this POS?
#1933 of 2007 Re: CAN I get your dealers Name ... diesel sounding 5.7 [mcsmadison]
Jan 31, 2009 (8:22 am)
Perhaps if you are truly that disgusted with your truck you should go back to a Dodge product?
My 4WD unit decided to get itself stuck in 4WD Hi not too long ago. Toyota has since issued a "TSB" or Technical Service Bulletin that updates the actuators for the 4WD system as well as a newer 4WD ECU. I am sorry you feel as though your Tundra is a POS. As to who built your truck...Americans in an American plant not a Mexican south of the border as you will find with a Dodge product.
I realize you are not happy with the truck you purchased and given the amount of money new vehicles cost I can feel you pain. However I am unsure of what expectations you preceive to have. Nothing in this world is perfect. I have answered your noise question with all the knowledge I have acquired through the proper channels. It sounds as if you have two choices...live with the noise or buy purchase another make or model. Good luck.
#1934 of 2007 Re: CAN I get your dealers Name ... diesel sounding 5.7 [mcsmadison]
Feb 01, 2009 (4:33 pm)
mine (07 5.7l 2 door tundra grade with sr5 badging)was built in san antonio but i doubt it has to do with where it was built. there are two things on mine that work flawlessly and easily(big !point on easily) the cruise control and the tail gate lowering mechanism. i have the slap sometimes more than others during warmup but after 10/12 miles it does subside. the transmission is from hell just last night after a quick deceleration i got back on the gas to make the turn and nothing then a big clunk like i had been rear ended. From reflections off the the bend in the hood, dash board plastic, and toyota emblem on the steering wheel to the placement of the wiper control it appears toyota has never built a truck/car before and i have had three toyota trucks this being the 4th and a royal lemon and since they did not cover the door stop complete breakage at 13400 under warranty and the first problem was within a year and under 12000 i am pursuing a lemon law suit. Btw i got out of a dodge 03 3/4 ton with over 100k on the v10, ran like a john deer, with some minor pains in neck
#1935 of 2007 Re: 3 liter V6 vs. 5.7 liter V8 [1972ck]
Feb 01, 2009 (5:02 pm)
I think you're right about the piston slap--I've heard a number of other tundras in colder weather make the same noise on start-up, until about fully warm. It's a bit unsettling, but Ok.
xfer case actuator issue is a whole other can of worms. I'm not how toyota designed this xfer case (2spd on 6 sp AT/5.7) but it is not only fickle, but slow to respond and engage, it seems like aroll of the dice with the xfer case at times.
I've now had mine replaced (at 3K miles). Works OK, but still clunky. Disappointing anyway, from a toyota. Transmission now whines, as if there is something not lined up properly...probably because something isn't! It's been in the shop for more than a month out of the past six months--not what I expected from a new toyota truck.
#1936 of 2007 Re: CAN I get your dealers Name ... diesel sounding 5.7 [1972ck]
Feb 02, 2009 (5:19 am)
As far as expectations.....
1. Toyota should at least acknolage the problem and replace or fix the engines that are knocking. I went to the dealer and started a NEW truck and they do not knock at all . Even my neigbours tundra does not knock.
2. Well yes , I could sell my truck but then who in their right mind would give me a proper market price with an engine that knocks . Maybe Toyota should do a buy back and try to sell their knocking trucks themselves and see how much fun they have trying to sell all the knocking tundra.
So all in all Toyota has left the customer holding the bag with a knocking truck that will be very hard for the owner to getgood resell value on. As started on other posts Toyota's 2009 tundra engines are built different and they do not have those proboems. Hmmm maybe Toyota should be replacing the 07's with the new improved 09's engines there is an idea !!