Re: Replace VVTI?

I don't understand why replacing a VVTi control valve would necessitate
replacing the chain. Did they offer an explanation there? I've replaced
more than a few of those things on that engine and its a pretty straight
forward job. Which trouble code are you getting?

qslim wrote:[color=blue]
> I don't understand why replacing a VVTi control valve would necessitate
> replacing the chain. Did they offer an explanation there? I've replaced
> more than a few of those things on that engine and its a pretty straight
> forward job. Which trouble code are you getting?[/color]

Having checked out the diagram it is actually a chain, so no need to
replace even if you're taking it off, and the valve can be changed
without taking that off. The only thing that might require it is if
the actuator needed replacing, and even then the chain would be ok.

Well, this is quite interesting. Basically, they said that they would
have to get down in there and see if they could replace the VVTi
without replacing the chain. I am taking it to another dealer next
week, so perhaps a second opinion couldn't hurt here.

Any ideas on whether I am hurting the engine by driving it around with
the check engine light coming on and off intermittently? I think the
one post says it is just affecting high-end performance, is that right?

Thanks for any help.

"Toyowner" <cefuhrmann@hotmail.com> wrote in message
news:1165437194.145264.210390@79g2000cws.googlegroups.com...[color=blue]
> Well, this is quite interesting. Basically, they said that they would
> have to get down in there and see if they could replace the VVTi
> without replacing the chain. I am taking it to another dealer next
> week, so perhaps a second opinion couldn't hurt here.
>
> Any ideas on whether I am hurting the engine by driving it around with
> the check engine light coming on and off intermittently? I think the
> one post says it is just affecting high-end performance, is that right?
>
> Thanks for any help.
>[/color]
If the VVTi mechanism is not working correctly then there is no long-term
damage to the engine, although it will not pass an emissions test with thee
check engine light illuminated.
--

Ray O
(correct punctuation to reply)

Right on Ray. What the VVTi valve we're talking about here does is direct
oil pressure to the end of the intake cam during higher engine speeds. In
doing so, the intake valve timing advances allowing the engine to breathe
more easily. If the valve is indeed the part in question and not
operating like it should and displaying an MIL, the VVTi simply won't
work. It's just like driving a corolla from a few years back before the
system was installed, no harm done other than the light.