Yes to all the above. My first post was based upon a
quick-look and an assumption. I was wrong. The
intake valve has been hotter as evidenced by the
discoloration on the valve. I'll get it opened
tomorrow and will share photographs.
rick
--- Richard Ewald <richard.ewald@gmail.com> wrote:
> Don't you mean #2 intake is discolored?
> (Working from memory, cause I am too lazy to go grab
> my shop manual)
> 5 port head
> Two intakes, three exhaust.
> Looking at the head, the bigger valves are closest
> to each other in 1 & 2
> and 3 & 4 these would be the intakes.
> The small valves at at the ends (1 & 4) and next to
> each other for cylinder
> 2 & 3
> That gives three exhaust ports, and two intake
> ports.
> Also aren't intakes always larger as the air
> pressure is lower?
> rick
>
> PS, Set the head on its side and try filling the
> valve tracks with liquid to
> see which ones leak. Old mechanics trick.
>
> On Jan 4, 2008 2:09 PM, Rick Lindsay
> <rolindsay@yahoo.com> wrote:
>
> > A bit ago I wrote:
> >
> > > And now, a look at the combustion chambers and
> the
> > > valves: http://www.aubard.us/MGB/HPIM0862.JPG
> In
> > > this view, the #4 cylinder is on the left.
> Again, >
> > there is nothing visually revealing about #2's
> > > pressure problem.
> >
> > Upon reinspection, I have noticed that the
> > discoloration on the #2 exhaust valve is
> asymetrical.
> > Check it out. Once I disassemble the valve train
> I
> > will inspect that discolored side and will
> probably
> > find that the valve and/or seat is burned there.
> Who
> > knows how the valves were adjusted before I got
> the
> > car. I'll send pictures once I get it opened.
> >
> >
> > More as the discovery process continues.
> >
> > rick
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