Eric,
Your machine shop is right, unleaded has nothing to do with the bent
valve.
What did? The fact it was en exhaust valve tells a story in itself.
Perhaps lack of proper adjustment, burned the valve, then it stuck
and got struck by the piston?
Or perhaps you overreved the engine and bent a valve.
On valve size, forget what the girls tell you, size DOES matter.
The question is, how much coin you got floating round in your pocket?
You wont be able to open the valves up to a considerable improvement
without spending some serious money.
On titanium, get out cubic coin here.
On grind, a nice 3 angle valve job is nice.
Wont make a big improvement, but is an inexpensive way to get another
pony.
New guides are reccomended as are new valves.
Upgrading to guide seals is fine, but only if the guides are silicon
bronze, not the cast iron originals.
Thats all I can think of for now.
Good luck
Jarrid Gross
SerIIAlpine@netscape.net wrote:
>
> Having bent the #1 exhaust valve on my 3000mile young engine I was wondering
> what my options are regarding upgrading my head. I've already portmatched
>and cleaned up my head as per serII special tuning guide recommendations and I
>just wanted to know what I could do to make the head better and more durable.
>ie:larger valves(titanium?), what type of grind, what type of guides to insist
>on etc.
>
> I beleive the valve failure(It's stuck halfway down) may have been due to
>using unleaded even though the machine shop that did the head said it wasn't
>an issue.
>
> As always, thanks for any and all help.
>
> Eric
> '62 serr II
>
> __________________________________________________________________
> The NEW Netscape 7.0 browser is now available. Upgrade now!
>http://channels.netscape.com/ns/browsers/download.jsp
|