why is my compression bad? :(

[Rabbit16v@attbi.com (Rabbit16v)]

I'd like to here why too, Daun.  I haven't ever really been EASY on any
break-in but I have never been told to run a motor HARD to break it in.
Just doesn't sound right??!!

Dave

> From what I've read on breaking in engines, there seems to be two ways:
run it hard for awhile, or run it relatively easy for a longer amount of
time.  I broke the engine in on a road trip, for the first 400 miles I would
get up to about 65mph, drop down to 40, then mash the gas back up to 70mph.
It has been revved above 5k, but only maybe once every 3 weeks or so!  What
exactly do you mean by screwed?  If I did break it in wrong, what are the
results of that?  Thanks-
> Rob
>  Daun Yeagley <vwdaun@yahoo.com> wrote:Robbie,
>
> The wear limit on the JH is 109 psi.
>
> Now as for babying the engine, that's the worst thing you
> can do, especially when breaking in an engine. In order to
> break in the engine you need to run it h-a-r-d. If it's
> been 10k though, you may be screwed. Won't hurt to try
> however. Just be sure the oil is up to 80 C or so
> beforehand, but then wind it out to redline often, and do
> the same on downshifting, i.e. time it so you'll be in the
> 5-6k range.
>
> Daun
>
>
> --- Robbie Cotner wrote:
> >
> > I ran a compression check on my JH 8v today, 135-140psi
> > on all cylinders. Adding some 80w-90 to the cylinders
> > raised all readings ~10-12psi. This thing was rebuilt
> > 10k ago, immediately after the rebuild I had 150psi on
> > all cylinders!? I was hoping compression would increase
> > once the rings got seated. From what I've read 130psi is
> > the minimum for JH's, I'm not happy. Is this why my
> > engine has such low power? I really have babied this
> > thing, never revved above 5k, I've changed the oil many
> > times and am running synthetic 10w-30. My exhaust smokes
> > all the time, but the smoke is white as a ghost and I
> > attributed it to the cold... my spark plugs also show no
> > indication of burning oil. Any opinions on this? Thanks
> > in advance,
> >
> > Rob
> >
> >
> >
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