1MZ-FE is non-interference
in [Toyota]
|
From: JoeSpareBedroom on 19 Dec 2007 15:40 Here's his original logic: All: Thank you to those of you who answered my initial question. I have almost 73K on this Avalon; but, it was rarely driven by the previous owner so I am satisfied that I won't need the timing belt and water pump changed for awhile. "Jeff Strickland" <crwlr(a)verizon.net> wrote in message news:5ffaj.28688$JW4.23404(a)trnddc05... >I didn't follow the other thread, and only knew of his question as to the >kind of motor but not the reasoning for asking it. > > > > "JoeSpareBedroom" <dishborealis(a)yahoo.com> wrote in message > news:fdfaj.638$Sa1.359(a)news02.roc.ny... >>I believe Keith is using the new information to justify his logic that >>because it took so many years for the car to log 73K miles, it "wasn't >>used much", so those miles are somehow different than if they had been >>driven in a shorter period of time. Of course, that's silly, but that's >>what he was saying in his other thread. >> >> >> "Jeff Strickland" <crwlr(a)verizon.net> wrote in message >> news:Y8faj.28686$JW4.9295(a)trnddc05... >>>I have to take issue with the comment. >>> >>> I can't say if the motor is a non-interference type or not, but the >>> determining factor is not the presence of a timing belt. That is, simply >>> using a belt as opposed to a chain does not prescribe interference or >>> non-interference. It's possible that Toyota makes such a distinction, >>> but this is not the determining factor in the grand scheme of things. >>> >>> Interference, or the lack of it, describes the ability of the pistons >>> and valves to collide should something go astray. Interference is more >>> accurately denoted by the compression ratio -- a low ratio will have >>> more room in the combustion chamber for the piston and valve to >>> peacefully co-exist. >>> >>> I have to wonder at the response you received because I do not expect >>> the ability for the pistons and valves to collide to be related to the >>> kind of valve timing mechanism. I suspect the motor is the >>> non-interference type, but not because it uses a timing belt as opposed >>> to a timing chain. >>> >>> >>> >>> >>> >>> >>> "Keith Lee" <cmarvel(a)NOSPAM.nethere.com> wrote in message >>> news:pan.2007.12.19.20.13.03(a)NOSPAM.nethere.com... >>>> All: >>>> I just received this email from a Service Coordinator at my local >>>> Toyota dealership and repair place. It's >>>> now official that my 1998 Toyota Avalon engine is non-interference. >>>> Thank you to everyone who helped me >>>> with this question. Here is Mira's email below. >>>> >>>> Keith Lee >>>> >>>> >>>> >>>> Hi Keith, >>>> Your 1998 Avalon has a 6cylinder engine and a timing belt, this >>>> constitutes that your engine is non- >>>> interference. If you have any further questions please respond to this >>>> email or feel free to call us directly at >>>> the phone number listed below. >>>> >>>> Mira Winsby - Service Coordinator >>>> >>> >> >> >
From: Keith Lee on 19 Dec 2007 15:40 All: No, I just wanted to find out more about my new car's engine; and frankly, I got sick and tired of hearing so many different views about whether it was or wasn't. Now, I have the official word from Toyota and feel that I finally have the answer. I will have BOTH my water pump and timing belt changed soon. Keith
From: Jeff Strickland on 19 Dec 2007 15:57 That's cool. I suspect a non-interference engine too, but not for the reason given. I consider the explanation to be a bit more of the run around that is making you so exhausted. I wish I had more concrete information for you, but I do not think the information you got is definitive, but I only say that because I think there is a disconnect between the explanation of what you have and why you have it. I do not question the "what," I only question the "why." If the spec is to replace the belt at 60k, I do not think it matters that 60k was racked up on the freeway in 3 years or racked up going to the super market in 6 years. Having a non-interference motor only means that when the belt finally gives up, the worst that can happen is you get a ride home on a flatbed truck. Lots of bad things can happen because of the inopportune moment that it might fail, but you won't add bent valves and pistons with holes in them to that list ... "Keith Lee" <cmarvel(a)NOSPAM.nethere.com> wrote in message news:pan.2007.12.19.20.40.14(a)NOSPAM.nethere.com... > All: > No, I just wanted to find out more about my new car's engine; and frankly, > I got sick and tired of hearing so > many different views about whether it was or wasn't. Now, I have the > official word from Toyota and feel that I > finally have the answer. > I will have BOTH my water pump and timing belt changed soon. > > > Keith
From: Hachiroku ハチロク on 19 Dec 2007 21:52 On Wed, 19 Dec 2007 20:27:36 +0000, Jeff Strickland wrote: > I have to take issue with the comment. > > I can't say if the motor is a non-interference type or not, but the > determining factor is not the presence of a timing belt. That is, simply > using a belt as opposed to a chain does not prescribe interference or > non-interference. It's possible that Toyota makes such a distinction, but > this is not the determining factor in the grand scheme of things. Perhaps. It used to be SOHC-Interference, DOHC=N-I.
From: Mark A on 19 Dec 2007 22:42
"Jeff Strickland" <crwlr(a)verizon.net> wrote in message news:EAfaj.17361$c82.17244(a)trnddc01... > That's cool. I suspect a non-interference engine too, but not for the > reason given. I consider the explanation to be a bit more of the run > around that is making you so exhausted. > > I wish I had more concrete information for you, but I do not think the > information you got is definitive, but I only say that because I think > there is a disconnect between the explanation of what you have and why you > have it. I do not question the "what," I only question the "why." > > If the spec is to replace the belt at 60k, I do not think it matters that > 60k was racked up on the freeway in 3 years or racked up going to the > super market in 6 years. Having a non-interference motor only means that > when the belt finally gives up, the worst that can happen is you get a > ride home on a flatbed truck. Lots of bad things can happen because of the > inopportune moment that it might fail, but you won't add bent valves and > pistons with holes in them to that list ... I believe the spec is to change the belt at 90K. At least it was when the car was new. |