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Re: SVO: Valve noise fixed!
On Sun, 14 Dec 1997, Carl Haines wrote:
> I posted 2 wks ago about my valve train going clack clack. Well, it's
> fixed now. With Nick's help I found that the assembled valve spring height
> was too high. On one of my valves the follower was hitting the edge of the
> spring retainer, causing the follower to lift off the valve tip. Also, the
> lash adjuster was always bottomed out. I suspect the noise was coming from
> the follower losing and regaining contact w/ the valve tip.
> The fix consisted of a different set of valve keepers that lowered the
> spring height by .050".
> The lesson learned here is that if you need work done to your head
> concerning the valves, you should be sure you go to a shop that knows how
> to set up a 2.3l head. Even though a shop may be good at setting up V8
> heads doesn't mean they know how to set up a 2.3l head. If you need head
> work done and you don't know who to do the work, you might want to contact
I think there is a lesson here...
No matter what a shop tells you (or sells you...)...you need to
double-check stuff before you run it.
That means checking clearances between the rocker and the retainer, the
collapsed tappet clearance (in the shop manual) and the retainer/guide
Got a post from a lurker on the list. Seems he had a "slight" problem on
a new motor which (coincidentally?) had one of Nick's cams in it...
After running 20 minutes, it stuck a valve and evidently had to be
completely rebuilt. Apparently, the cause of the stuck valve was a tight
guide. He also got stuck with the expenses...Nick didn't exactly run to
his assistance from what I understand...
Hmmmm...this is now "Case History #5"...all are valve guide-related...
Suppose it could be the fact that the valves only have a little over .600"
of travel and the seals take up between .140 and .150" of that? Maybe.
Maybe it's because there isn't really such a thing as a "bolt-in" .500"
Check your own clearances, because you're the one who's gonna be footing
the bill if you don't.