engine noise
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*** Copied from Previous Board - nhparrot **************
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Topic: engine noise
jeffd
TS Member
Member # 173
Rate Member posted 02-14-2002 12:47 AM
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13500 miles and no plug change
quote:
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Originally posted by Al_G:
I changed my plugs with Bosh Platinum+4's at 16K hoping it would improve gas mileage. It did for the first couple thousand miles. However, it later developed a pinging sound only when the engine was warm. And as mentioned in the old posts, this was common. Changing to Super Unleaded 93 Octane was out of the question. If the manufacturer recommends regular 87, use it. It also helped me make the decision to go back to the original plugs. After changing to the original plugs purchased from the dealer, I noticed a popping sound, almost like air escaping from one of the cylinder banks. But only when the engine was warm. I also noticed a major reduction in my MPG (loss of 4-5 MPG). I decided to bring it into the dealer and am waiting for the diagnosis today.
jeffd, how many miles on your Tundra? Have you changed the plugs yet?
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jcd
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Posts: 4 | From: wv | Registered: Feb 2002 | IP: Logged
Ricey
TS Supporter
Member # 203
Member Rated:
posted 02-12-2002 08:50 AM
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quote:
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Originally posted by James:
I do believe you could own this Truck for years with just such a noise (piston/wrist pin-slapping) with no ill side effects at all.
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"James", I agree, it's just sounds real bad until warmed up!
Ricey
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Posts: 37 | From: N. Attleboro, MA | Registered: Feb 2002 | IP: Logged
Al_G
TS Member
Member # 201
Rate Member posted 02-12-2002 08:19 AM
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I changed my plugs with Bosh Platinum+4's at 16K hoping it would improve gas mileage. It did for the first couple thousand miles. However, it later developed a pinging sound only when the engine was warm. And as mentioned in the old posts, this was common. Changing to Super Unleaded 93 Octane was out of the question. If the manufacturer recommends regular 87, use it. It also helped me make the decision to go back to the original plugs. After changing to the original plugs purchased from the dealer, I noticed a popping sound, almost like air escaping from one of the cylinder banks. But only when the engine was warm. I also noticed a major reduction in my MPG (loss of 4-5 MPG). I decided to bring it into the dealer and am waiting for the diagnosis today.
jeffd, how many miles on your Tundra? Have you changed the plugs yet?
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Posts: 4 | From: PA | Registered: Feb 2002 | IP: Logged
James
TS Member
Member # 236
Rate Member posted 02-12-2002 06:05 AM
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It is my understanding, that with all mass-produced engines, the motors are assempled from parts-bins.
You have mass produced rods, cranks, pistons, wrist-pins, and they are randomly pulled from the containers and assembled. So you have parts being quickly put together and put thru the standard checks and if the "Minimum" tests are passed, into the truck it goes. What that means, in the long run is the odd chance that every once-in-awhile a piston is matched with a Cylinder where the clearances are 'off' just enough to produce just such a noise.
Quality Control (which is why most of us bought the toyota to begin with) should catch this. However, this is something that takes expansion and contraction to produce, sometimes over a period of weeks...months...years....??? and it is almost next to impossbile for them to catch something like this during post assembly.
I do believe you could own this Truck for years with just such a noise (piston/wrist pin-slapping) with no ill side effects at all.
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Posts: 5 | From: Virginia | Registered: Feb 2002 | IP: Logged
thisiscjh
TS Supporter
Member # 594
Rate Member posted 02-12-2002 03:28 AM
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My 2000 started out doing the noise only once in a while on chilly mornings. Now it last longer and is louder. Dealer told me it's piston slap and is normal. My question is why don't all eight pistons do it then? Chuck
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Posts: 2 | From: Mountain Home, AR. | Registered: Feb 2002 | IP: Logged
2001 cobra
TS Member
Member # 590
Rate Member posted 02-12-2002 12:38 AM
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Mine is a 2000, and it had a cold engine tap. We took it to the dealer because it has 55,000 on it and we figured it would still be under powertrain warranty. Well when we picked it up they said it was "probably" a cracked exaust manifold. They said they couldnt justify spending the money to fix it because that might not be it. So that could be your problem too.
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2000 Tundra SR5 4X4
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Posts: 1 | From: ky | Registered: Feb 2002 | IP: Logged
Tundra 5150
TS Supporter
Member # 98
Member Rated:
posted 02-11-2002 07:18 PM
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Mine has a light clatter that lasts no longer than 30 seconds. The only reason I noticed it was because of the many posts on this site. In order to get mine to rattle, I have to put a light load on the engine by placing it into drive and applying very light throttle while holding the brake down. Even then you really have to listen for it. The morning temps have been around the mid thirties and low forties here. I heard that on others it is a lot louder. I guess I'm lucky for now.
My 83 Toy 4X4 with the 22R motor had the characteristic cold piston slap since my Dad bought it new and is still running strong today with no ill effects. In fact, the noise seems to have disappeared sometime in the last couple of years. Maybe Toys improve with age and mileage. I think the old Toy is finally nicely broken in.
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Posts: 17 | From: Sacramento, CA | Registered: Feb 2002 | IP: Logged
James
TS Member
Member # 236
Rate Member posted 02-11-2002 10:11 AM
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Well, I can say that my new 2002 Tundra will make some engine noise at startup, (very slight tapping) on a very cold morning. However, it will do this only about 1 out of 10 times and after about five minutes it is gone before the temp gets fully up there. So, I have come to the conclusion that it is not worth the effort, at this point. I do NOT believe this is an exhaust leak.
Funny thing, right before I sold my Honda and bought the Tundra, the Honda had about 170,000 miles a LOUD knock could be heard within the engine on cold startups (funny how things like that POP UP right before you go to sell something) anyway, every Honda dealer told me that it is normal to hear that 'Piston Slap' on higher mileage Honda Engines and told me not to worry about a thing. I was cusious and threw some 20w-50 oil in the Honda for it's next oil change and the knock never came back, even on the coldest mornings. No way am I putting that thick a oil in the Toyota, just a little side note.
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Posts: 5 | From: Virginia | Registered: Feb 2002 | IP: Logged
Ricey
TS Supporter
Member # 203
Member Rated:
posted 02-11-2002 09:41 AM
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Before everything got "dumped" there were many ongoing discussions about a "diesel" knocking sound from a small percentage of Tundra owners. This was more noticeable when the colder weather set in. The most common dealer feedbacks were "could not reproduce noise", "normal for that engine", "piston slap", and "wrist pin noise". Most common symptons where noticed upon start-up in the morning and then after a 5-10 minute warm-up the noise would subside. Get your truck listened to by the service department and get something on paper to verify that they acknowledge the noise. Then contact Toyota Corporate and let them know your dissapointment in the noise. Maybe if enough of us respond there will be some sort of action on their end, nothing ventured nothing gained. Good Luck.
Ricey
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Posts: 37 | From: N. Attleboro, MA | Registered: Feb 2002 | IP: Logged
jeffd
TS Member
Member # 173
Rate Member posted 02-11-2002 03:44 AM
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has anyone or is anyone experiencing a pecking or knocking noise at start up on cold mornings? mine has always done it. it sounds bad but runs fine. after it warms up its fine
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jcd
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Posts: 4 | From: wv | Registered: Feb 2002 | IP: Logged
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