joined the timing belt club at ~ 87k
#77
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Is the issue noise, since compression is fine? Is any issue with the TB a done deal? Again, I don't believe it makes any difference which direction the arrows are facing, as long as the tooth count is exact, but this is coming from someone who has not performed the job. Just that I haven't seen any reliable answer on what the difference is, besides it just is, and I have seen a reliable case of where someone openly said he put it in backwards and had no issues, although it is unxplainable that in the pic the crank seemed off. I thought with my Nissan, the valve adjustment would come up where someone said the motor was making more noise than they would like....I believe the cams have to come out at least with the Maxima, it would get shimmed, and it wouldn't be cheap even though it's a V6 (still dohc)....again I never even considered doing it in 240k and didn't seem to suffer as a result...
#79
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This would be my acid test. What were the measurements? There is still a decent amount of labor to measure the clearances, and much more labor to do anything about it. If they say, you just need it, we didn't write down the measurements, SEE YA!
#80
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There's still the question of possible valve damage causing the noise. No noise before? Why should valves need to be adjusted after a TB replacement?
#81
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Is the issue noise, since compression is fine? Is any issue with the TB a done deal? Again, I don't believe it makes any difference which direction the arrows are facing, as long as the tooth count is exact, but this is coming from someone who has not performed the job. Just that I haven't seen any reliable answer on what the difference is, besides it just is, and I have seen a reliable case of where someone openly said he put it in backwards and had no issues, although it is unxplainable that in the pic the crank seemed off. I thought with my Nissan, the valve adjustment would come up where someone said the motor was making more noise than they would like....I believe the cams have to come out at least with the Maxima, it would get shimmed, and it wouldn't be cheap even though it's a V6 (still dohc)....again I never even considered doing it in 240k and didn't seem to suffer as a result...
#83
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Yes maybe the backwards belt works but shows a lack of experience and no attention to detail. It sounds like the shop did something wrong here. It is an interference engine. Someone does the TB and now there's valve train noise. This is a one day job. How long did they take?
#84
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Yes maybe the backwards belt works but shows a lack of experience and no attention to detail. It sounds like the shop did something wrong here. It is an interference engine. Someone does the TB and now there's valve train noise. This is a one day job. How long did they take?
#85
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Give the shop an LS that runs fine. No valve noise. They do the TB. Belt install is incorrect (see Tom 2/27).
Now the valves need to be adjusted? Why didn't they mention this or give a quote?
Now the valves need to be adjusted? Why didn't they mention this or give a quote?
#86
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This is where I am getting irritated. They were trying to say that OCV was a little noisy, but quiets down when warm. I also told him that the noise does not get quiet/quieter when the motor is warm, mentioned this to him before and for some reason he sounded shocked when I told him again. This was when I first got my car back. The statement didn't make sense, as I had a GS430 with the same motor and had to change out the OCV's before and am familiar with some symptoms they exhibit when not working properly.
#87
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This is where I am getting irritated. They were trying to say that OCV was a little noisy, but quiets down when warm. I also told him that the noise does not get quiet/quieter when the motor is warm, mentioned this to him before and for some reason he sounded shocked when I told him again. This was when I first got my car back. The statement didn't make sense, as I had a GS430 with the same motor and had to change out the OCV's before and am familiar with some symptoms they exhibit when not working properly.
If they won't make good, then BBB, Yelp, google, DMV, etc. Dunno why, but it seems every establishment starts out with a A+ rating at the BBB. If they get one complaint and do not resolve, it drops to C-, and establishments seem to care about the BBB whether accredited or not. This case is all of our worst nightmares, the last thing we want is to have our cars serviced and then to have a subsequent problem....good luck...
#88
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Again, I don't believe it makes any difference which direction the arrows are facing, as long as the tooth count is exact, but this is coming from someone who has not performed the job. Just that I haven't seen any reliable answer on what the difference is, besides it just is, and I have seen a reliable case of where someone openly said he put it in backwards and had no issues, although it is unxplainable that in the pic the crank seemed off. I thought with my Nissan, the valve adjustment would come up where someone said the motor was making more noise than they would like....I believe the cams have to come out at least with the Maxima, it would get shimmed, and it wouldn't be cheap even though it's a V6 (still dohc)....again I never even considered doing it in 240k and didn't seem to suffer as a result...
There is plenty of evidence posted by 02Legend that his belt was installed backwards. If it didn't matter which way the match marks on the belt were installed, why would 02's 2nd tech even say the belt was originally installed "backwards"? And why did he flip the belt and re-install it? If it didn't matter which way the belt was installed, why did the belt have arrows with L and R markings from the factory? Why does the manual say to hand turn the engine 2 full rotations on the crank to make sure no valve interference before starting up the engine?
The novice indie tech installed the belt backwards, turning the cams and crank to make the match marks "all line up." He then started the engine and heard a valve(s) hit a piston(s), even if only lightly. That bent a valve(s). The noise 02Legend hears is the damaged valve(s). They now tell 02Legend that they want to "adjust the valves" for $2,400. (Replacing a timing belt and tensioner correctly does not require any valve adjustment. I'm not aware that there is any valve lash which is adjustable on the 3UZ-FE. The hydraulic lifters compensate for that.) But the tech knows they need to tear down the upper engine and replace the bent valve(s), but they're not telling 02Legend that. Perhaps I just wrote what others are thinking as well, but none of us want to tell 02Legend this strong possibility.
I would take the LS to another shop and have them diagnose and fix the cause. Then take up the cost to repair with the original shop. Did you use a credit card for the original timing belt job? Then refuse payment through your credit card company. Also, many credit card companies offer various types of insurance coverage on purchases. Look into that. Finally, since the damage is fixable and relatively small dollars, you can always file a small claim court complaint. Be sure to get a written statement from the shop that fixes the damage, AND be sure they give you the damaged valve(s) for your Exhibit A.
Last edited by Tom57; 09-20-18 at 07:53 PM.
#89
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edit p.s. I googled this topic and it's absolutely hilarious....do it if you want a laugh. There's really only one answer, but two sides of the debate, like what happens if you use 93 octane in a car designed for 87.....etc. To elaborate, you'll find people who state they did in fact technically reverse it, that their cars are running fine, and someone will insist the wear pattern will be different and eventually the motor will fail....sometimes we just need to take a step back and remember, it's a belt. The other thing, is in life, people do make mistakes. It's important to be accurate with what the consequences are, imho...
Last edited by Johnhav430; 03-30-17 at 08:42 AM.
#90
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edit: this doesn't let the original shop off the hook, plenty of what if's. What if they put it on with the arrows pointing forward, missed a tooth, got the error, panicked, now put it on backwards lined up. Anything could have happened, and the "backwards" just casts doubt on the overall job...
Last edited by Johnhav430; 03-30-17 at 08:44 AM.