You guys are all aware the valvetrain uses hydraulic lash adjusters, right?
If they're draining down, they have to pump up (but they should not drain down.) If the oil is a little heavy it might take a moment longer than if it is lighter.
Most performance mods need a watch and timed course to demonstrate actual improvement. Few deliver the advertised claims. Many are actually worse than stock. The best performance mods are made to the driver.
Emotional arguments - They're not just for chicks anymore.
You guys are all aware the valvetrain uses hydraulic lash adjusters, right?
If they're draining down, they have to pump up (but they should not drain down.) If the oil is a little heavy it might take a moment longer than if it is lighter.
Lobux... I think you may be onto something here...
This coupled with the TSB on the 250 that calls for replacement of the lash adjusters... That TSB was for the 'Check Engine - VSC Light' problem on the 250. But, I remember once within 2 months of owning the car I picked it up from the tinter and when I started it up I got that check engine/VSC warning. It went away quickly but I've always remembered that. I know the TSB doesn't cover 350s (what I have) but the overall design of the engine is certainly very similar and it would stand to reason would suffer from the same design issues. I wonder if I should take it back in and mention this...
I'd bet a pretty sizeable amount of money on the hydraulic lifters - your description above is absolutely classic hydraulic lifter noise. the rocker arms are not mounted on a shaft of any kind, they're basically loose in the head and they pivot on the top of the hydraulic adjuster, so if there's any back draining at all, you're going to hear some clatter while they pump up. The "roller" rocker claim is because they have a needle bearing roller in the middle where the cam contacts the rocker instead of a simple hardened pad (as motorcycles have done for many years.) It's a damned shame they didn't just go with variable thickness buckets as they have with so many other Toyota engines. They NEVER make noise.
Which brings us back to the small number on the oil rating - 5w vs.10w. 5w will get to the top end faster than 10w on any given day.
Bichon - my closest dealer says the same thing - we're using 5w-30 period. They're ignoring the TSB. I won't have them change it again, I just took advantage of their 1 free change. I have noticed a mileage decrease over the same trip since my oil change. It's only 1 mpg, but it's still 1 less than before.
Most performance mods need a watch and timed course to demonstrate actual improvement. Few deliver the advertised claims. Many are actually worse than stock. The best performance mods are made to the driver.
Emotional arguments - They're not just for chicks anymore.
I'd bet a pretty sizeable amount of money on the hydraulic lifters - your description above is absolutely classic hydraulic lifter noise. the rocker arms are not mounted on a shaft of any kind, they're basically loose in the head and they pivot on the top of the hydraulic adjuster, so if there's any back draining at all, you're going to hear some clatter while they pump up. The "roller" rocker claim is because they have a needle bearing roller in the middle where the cam contacts the rocker instead of a simple hardened pad (as motorcycles have done for many years.) It's a damned shame they didn't just go with variable thickness buckets as they have with so many other Toyota engines. They NEVER make noise.
Which brings us back to the small number on the oil rating - 5w vs.10w. 5w will get to the top end faster than 10w on any given day.
Bichon - my closest dealer says the same thing - we're using 5w-30 period. They're ignoring the TSB. I won't have them change it again, I just took advantage of their 1 free change. I have noticed a mileage decrease over the same trip since my oil change. It's only 1 mpg, but it's still 1 less than before.
I took my IS350 to the dealership today for the 5000K service and they explained EXACTLY what "lobuxracer" is stating in his messages. The sound is normal in the IS350 models. They talked about the fuel pressure also and something about hydraulic and electric pumps...
I've had this noise since new. I don't post much in the forum, but I've been a memeber for a while and I'm always reading new posts.
I'll post as soon as I get my car back and see if they do anything about the sound.
mine does something like this too.. its doing it more often now. i was thinking that it might have something to do with the cooler weather. it last only a few seconds. sounds like something is hitting something. i may take mine to the dealer soon.. my window started squeeking too yesterday.
I just started hearing this same noise this week. It is very hard to duplicate because it only does it once in a while. On mine it only does it right when the engine cranks for a few milliseconds and then goes away. Hopefully somebody can find out what this is...
I picked up my car yesterday. They call it a ticking sound and everytime they said that i say I hear a metal sound hitting medal. They said that it was normal but then on the work order i just reviewed it said they couldnt duplicate it the issue. I also inquired about the TSB and oil type and they seemed to act like they didnt know. I even think he said that they used 10w-30. I am switching to 5w-20 like the TST says next time. Ironically this morning when I started the car it didnt make the noise, but it is warmer than it has been.
My car started to make this noise two days in a row now. I'm using 5w-20 synthetic oil and it only make that noise on the first start of the day. I really don't think it because of the cold weather since I live in south florida and this morning I started the car at 10AM and it was pretty warm by then.
OKay guys I got some update on the problem. After I made that post on 11/29 I took my car to the dealership but they couldn't do anything about it because they couldn't replicate the noise. I found out the problem is because of low OIL level. I came to that conclusion because when I did my last oil change before I bring it to the dealership I only put 6 quarts in there. A week ago I started the car up after an oil change, the engine made some horrible metal hitting noise and disappear like 2 seconds after. The noise hasn't come back since then and it has been a week. So those of you who get that weird noise on the start up, check your oil level.
Well, you guys can add me to the list. It's been very intermittent but unmistakable when it happens. I have checked the oil level and it was right at the upper notch. I have a call into my service advisor and he's going to give me a call back in a few.
I'm not terribly worried about it cause the oil level is good and I'll take it in for them to have a look. If they can't find anything, then they certainly can't blame me for not finding anything either.
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'06 IS350 Black on Black, Nav, ML, Sport, Volk Progressive Spoke 18"s w/ PS2's, 6000K d4s Xenondepot HID's
OKay guys I got some update on the problem. After I made that post on 11/29 I took my car to the dealership but they couldn't do anything about it because they couldn't replicate the noise. I found out the problem is because of low OIL level. I came to that conclusion because when I did my last oil change before I bring it to the dealership I only put 6 quarts in there. A week ago I started the car up after an oil change, the engine made some horrible metal hitting noise and disappear like 2 seconds after. The noise hasn't come back since then and it has been a week. So those of you who get that weird noise on the start up, check your oil level.
Very interesting. I changed my oil this past weekend (Royal Purple 5W30). Of course as everyone knows oil and filter change requires 6.7 qts. I decided to add a little bit more (just under 7 quarts).... lo and behold, it appears that the sound is gone. I think this is the key. Either the dealership didn't put enough oil in (which is not unbelievable) or my car has been burning more oil than I like to imagine on break-in (I'm at 12.5K right now). I was reading the manual the other day and I was quite surprised at how much oil the engine can burn and still be within the normal operating parameters. Anyway, this is my experience for what it's worth.
Very interesting. I changed my oil this past weekend (Royal Purple 5W30). Of course as everyone knows oil and filter change requires 6.7 qts. I decided to add a little bit more (just under 7 quarts).... lo and behold, it appears that the sound is gone. I think this is the key. Either the dealership didn't put enough oil in (which is not unbelievable) or my car has been burning more oil than I like to imagine on break-in (I'm at 12.5K right now). I was reading the manual the other day and I was quite surprised at how much oil the engine can burn and still be within the normal operating parameters. Anyway, this is my experience for what it's worth.
I haven't had that problem since my most recent oil change which I put about 6.5q in there.
Don't believe the dealership saying that the noise is normal, why some car has it and some car don't? Mine started to do it when I only put 6q of oil and it stop since I put more. Those of you with the problem should give it a shot, it doesn't take much effort to add a little more oil in there.
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