Last post on May 14, 2002 at 3:08 AM
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Toyota Tundra, Truck
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#517 of 1322 bamatundra
Jan 18, 2002 (12:15 am)
Are the pictures of the pistons from your Tundra? My 2001 Tundra 4x4 SR5 access cab has developed the cold start knocking problem also. On start up, sounds like light tapping against the block with a hammer. Are you saying this is because the pistons are cast? Is your knocking problem more pronounced at cold temperatures? Would changing my oil to a non-synthetic reduce the knocking tendency? I've been using Mobil 1 since about 10,000 miles. The knocking started at about 7,500, has 13,300 miles now. The dealer said Toyota is aware of the problem, but has taken a wait and see approach. With so many reporting, is Toyota planning to make adjustments to the owners of knocking engines for diminished life?
#518 of 1322 Sweetoy...
Jan 18, 2002 (2:18 pm)
I am just curious. Mobil one or Pennzoil or any full snthetic oil will cure your problem only if te engine is an older engine. I have seen studies done on older engines with more then 100K an it helped them with Better fuel economy, and power. I have never seen a claim where it can help knocking. As far as your problem at hand: Has Toyota checke the knock sensors on your truck?? This could be part of the problem. If your truck continues with this problem, document every time you go in and have it checked out. Also go to another dealer and have it checked out. Then go to your personal mechanic and have him check out the problem. Now you have 3 people telling the same story or conflicting stories. Now you have a Lemon Law case and you'll get a new '03 or '02 truck!!
#519 of 1322 Some people's children!
Jan 18, 2002 (7:13 pm)
"Are the pictures of the pistons from your Tundra?"
Yes, Sweetoy they are from my Tundra. I removed them one night in my spare time.
Jan 18, 2002 (7:53 pm)
Sweetoy, your mistake was taking your question to Bama, since "his" tundra is flawless! (LOL!)
Check out the GM engine knock topic. He's much more helpful there, enlightening all the hapless GM owners with his unwanted, toymota engine knock wisdom.
Or read up a few posts. You're not the first Tundra owner to report engine knocking. Just ignore his attacks, and someone else will help with your problem.
Jan 19, 2002 (8:54 am)
Check out www.tundrasolutions.com
There are other toy owners with
engine knock also.....
Them guys over there seem levelheaded
and ready to HELP a fellow Toy owner!
..... Good luck....geo
#522 of 1322 Has toyota checked the knock sensors on your truck...
Jan 20, 2002 (7:03 pm)
Knock sensors for a cold start knocking problem!!!
Guess them there knock sensors tighten up them clearances real quick now!!
I've heard it all.
#523 of 1322 You can't take your truck to have it listened to...
Jan 22, 2002 (8:27 am)
Remember - this is a cold start anamoly. Mine makes the sound (I won't call it a "knock") after it has sat all night in the cold. You can't just drive it to your mechanic or the dealer unless it's right next door. After only one or two minutes of driving, the sound is gone. Unless it's very cold (like, around zero) waiting for the engine to cool and the sound to come back would take an overnight or wait all day in below freezing temps to duplicate. And even then it's hit or miss - I've had my truck in the parking lot all day long in 30 degree temps and not have it come back... but leave it in the garage overnight in the teens or twenties and first thing in the morning, there it is.
So far it's no big deal - like Toyota, I'll watch it and see.
Jan 23, 2002 (5:47 pm)
I know it is an inconvience, but could you leave it at the dealer's overnight? Maybe they could arrange a loaner for the overnight? Just a thought.
Jan 24, 2002 (5:27 am)
Yes - I could - if it was worth that. But then you have to count on it being cold enough over night and then you're still at the mercy of some guy actually going out and doing it. You don't hear it at idle, only when accelerating. After going to all the trouble, I can just hear the guy saying "we couldn't get it to make any sound out of the ordinary."
And even IF they did duplicate it - what are they going to do? "Try" something? And how would they know if they fixed it? Wait around til the next cold morning and give it another go! So now we're on day TWO with the loner - and in all likelihood they still haven't fixed it.
So why do it unless there's something known to be wrong in the first place? Satisfying idle curiousity just isn't worth my time. Now if Toyota comes out with a TSB or warranty action, that would be quite a bit different.
It's wait and see for now.
Jan 24, 2002 (6:05 pm)
Well, I know the issue, as I have it with my GMC. Best of luck to you with the problem, and keep us informed if there is a "fix" in the future.