1MZ-FE is non-interference
in [Toyota]
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From: Mark A on 20 Dec 2007 22:37 "Keith Lee" <cmarvel(a)NOSPAM.nethere.com> wrote in message news:pan.2007.12.21.00.38.33(a)NOSPAM.nethere.com... > Ray: > Oh, I agree wholeheartedly that I should not wait too long. I don't travel > that much; and, I won't have the > money for my local Toyota agency to replace the timing belt until early > January 2008. I think that even with 10 > years use of my car by two previous owners but only 72K of mileage on the > car, I should be alright until then. > Thank you for the help you and the others have given me on this matter. > > > Happy Holidays, > Keith Lee If I were you, I would inspect the belt and if it looks OK, then just wait until 90K miles. The odds of your engine running as well as it does now are less than 50-50 after a timing belt change. Of course if your engine runs poorly now, maybe you should change it.
From: JoeSpareBedroom on 20 Dec 2007 22:40 "Mark A" <nobody(a)nowhere.com> wrote in message news:4yGaj.26014$vt2.20038(a)bignews8.bellsouth.net... > "Keith Lee" <cmarvel(a)NOSPAM.nethere.com> wrote in message > news:pan.2007.12.21.00.38.33(a)NOSPAM.nethere.com... >> Ray: >> Oh, I agree wholeheartedly that I should not wait too long. I don't >> travel that much; and, I won't have the >> money for my local Toyota agency to replace the timing belt until early >> January 2008. I think that even with 10 >> years use of my car by two previous owners but only 72K of mileage on the >> car, I should be alright until then. >> Thank you for the help you and the others have given me on this matter. >> >> >> Happy Holidays, >> Keith Lee > > If I were you, I would inspect the belt and if it looks OK, then just wait > until 90K miles. The odds of your engine running as well as it does now > are less than 50-50 after a timing belt change. Of course if your engine > runs poorly now, maybe you should change it. > Why would a new timing belt make the engine run poorly compared to before the work was done?
From: Mark A on 20 Dec 2007 22:54 "JoeSpareBedroom" <dishborealis(a)yahoo.com> wrote in message news:dBGaj.710$Sa1.99(a)news02.roc.ny... > Why would a new timing belt make the engine run poorly compared to before > the work was done? The timing belt determines the engine "timing". It is very difficult to get it exactly right, and some mechanics are lazy or poorly trained. Plus, once your engine has 8 years of normal wear, then sometimes setting the timing with a new timing belt reveals problems or inconsistencies with older parts in the engine. Let me give you an analogy: Suppose you have 2 keys for your car, but you only use one of them. The key that is used and the lock exhibit wear after 8 years of use, but they wear together. Then after 8 years if you try to use the 2nd key (in brand new condition) then you will find that it does not work well in the 8 year old lock. (Please don't tell me that a lock and key is not the same as a timing belt--you need to look up the definition of analogy). If you search Google groups archives, you will find many people complain that there engine does not run as well after a timing belt change. So my advice applies to you, assuming your engine is non-interference (which I believe is correct since it is the same engine as my 98 Camry V6).
From: nm5k on 21 Dec 2007 05:23 On Dec 20, 9:37 pm, "Mark A" <nob...(a)nowhere.com> wrote: > > If I were you, I would inspect the belt and if it looks OK, then just wait > until 90K miles. The odds of your engine running as well as it does now are > less than 50-50 after a timing belt change. Of course if your engine runs > poorly now, maybe you should change it. I disagree with that one.. Maybe with sloppy mechanics, but it's not hard to properly set up a timing belt. In all the ones I've done, I couldn't tell any difference at all in how they ran before vs after. But I am careful in setting up the timing marks. I'll line them up perfectly before taking the belt off, and not touch the gears when it's off. When I replace, I won't nail it down until it's exactly the same as it was when I took it off. This is not hard to do. I might have to do it over once or twice until it's perfect, but that is not hard to do. Even being one tooth off is enough to cause problems. But you have to be sloppy or lazy to have it one tooth off. Or in my opinion anyway.. If I put one one and it's one off, I'll redo it until it's right. You can tell by the marks if it's off or not if you carefully set it up before taking the old one off. Trust the timing marks! They don't lie. BTW, I always follow the tensioner settings *exactly* as per the manual. Many engines vary a bit in that regard. Some vary a lot.. IE: most hondas set up the tensioner totally different than most of the toyotas. MK
From: Mark A on 21 Dec 2007 12:36
<nm5k(a)wt.net> wrote in message news:a465a8ad-c812-4f05-814d-ac9c26923d0f(a)i29g2000prf.googlegroups.com... > I disagree with that one.. Maybe with sloppy mechanics, > but it's not hard to properly set up a timing belt. > In all the ones I've done, I couldn't tell any difference > at all in how they ran before vs after. > But I am careful in setting up the timing marks. > I'll line them up perfectly before taking the belt off, > and not touch the gears when it's off. > When I replace, I won't nail it down until it's exactly > the same as it was when I took it off. > This is not hard to do. I might have to do it over > once or twice until it's perfect, but that is not > hard to do. Even being one tooth off is enough to > cause problems. But you have to be sloppy or > lazy to have it one tooth off. Or in my opinion > anyway.. > If I put one one and it's one off, I'll redo it until it's > right. You can tell by the marks if it's off or not if > you carefully set it up before taking the old one > off. > Trust the timing marks! They don't lie. > BTW, I always follow the tensioner settings > *exactly* as per the manual. Many engines > vary a bit in that regard. Some vary a lot.. > IE: most hondas set up the tensioner totally > different than most of the toyotas. > MK I am quite sure you are the exception. Most mechanics would not do it over again several times if it was not exact (unless they are working on their own car). |