Date: Sun, 27 Jun 2004 23:58:54 -0400
Reply-To: Eric Zeno <vw4x4@FYI.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Eric Zeno <vw4x4@FYI.NET>
Subject: Valve seals
In-Reply-To: <000601c45cb5$75d11850$6400a8c0@masterpc>
Content-Type: TEXT/PLAIN; charset=US-ASCII
Speaking of valve seals. The most recent engine I've taken apart
still had the valve seals in place. I've never installed these,
on Vanagon engines, and I've never noticed a problem. Comments?
Eric 86-VW4x4
vw4x4@fyi.net 86-SS Syncro
Pittsburgh, PA USA 1936-Chrysler
92-Jetta GWC
www.fyi.net/~vw4x4/vw4x4.htm
On Sun, 27 Jun 2004, Dennis Haynes wrote:
> Another possible cause is worn valve guides. Worn intake guides will
> actually suck oil from the back of the head into the manifold. The valve
> stem seals are probably missing either from never being installed to
> them breaking and falling off. They don't do much on a new engine but
> once the guides wear they help prevent an oil burner.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of ROBERT DONALDS
> Sent: Sunday, June 27, 2004 2:19 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Rings? New engine?
>
> This could be rings or it could be a bad valve and the cylinder does not
> fire all the time and you have a crankcase full if unburned gas the
> symptoms
> are the same. you could also have an injector bleeding down when the
> engine
> sits and this would also send out smoke signals
> I think that when you are talking about main bearings in the WBX engine
> you
> need to be very clear that size the engine is. The 1.9 has huge case,
> main
> bearing issues and in my opinion all 1.9 cases need to be align bored.
> Align
> boring when done correctly can solve the loose main bearing problem the
> 1.9
> cases have. One problem with align boring is that some machine shops,
> I'm
> thinking west coast type large production shops set there cutters years
> ago
> and never looked back or measured the difference between the Brazilian
> mains
> and the German main bearing OD's. This alone can be the difference of
> the
> intended main bearing crush and no crush.
> The 2.1 main bearings are a thinner rolled trimetal bearing and do not
> have
> the loose main bearing problem the 1.9 suffers from. The center main
> bearings webs on the 2.1's do have to be closely inspected when the case
> is
> split to determine of the case is reusable
> Zoran is right It does depend on the mileage as to how far to go with
> the
> repair taking into account the warm oil pressure and the compression
> test
> both wet and dry
>
> going faster miles an hour with the radio on
> I remain
>
> Bob Donalds
> Boston Engine
>
>
> ----- Original Message -----
> From: "Craig Oda" <craigoda@GMAIL.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Sunday, June 27, 2004 12:08 PM
> Subject: Re: Rings? New engine?
>
>
> > So, this sounds like rings. My question to rest of the vanagon people
> > is about general rebuilds.
> >
> > First, I was surprised to see symptoms that look like rings, when
> > there are so many other things that can go wrong with the waterboxer.
> > In my own situation, my first engine had severely worn main bearings.
> > I believe this is fairly common. I've also heard conflicting reports
> > on the effectiveness of bore-aligning the case and installating new
> > main bearings.
> >
> > My own situation was that I had low oil-pressure on my first engine.
> > I cracked the case to check out the problem, verified that the main
> > bearings were really worn, then priced out the cost of the bore-align
> > and parts. I'm thinking that it was a bit over $400. Yikes... since
> > other parts of the engine were questionable, I bought a complete used
> > engine on the ebay for $150. I installed that and have been using it
> > for a year with good reliability and good power. However, one of the
> > cylinders if firing funny.
> >
> > I suspect that one of my rings on engine #2 might be messed up and
> > causing this odd sound and misfiring problems. I've tried to isolate
> > the problem with stethoscope and have changed the lifters. However, I
> > think that I'll eventually need to crack the case to check it out. I
> > already have a spare engine seal kit. However, I'm reluctant to open
> > the case of my working engine #2 and check things out.
> >
> > My question as relates to Blake, is it really cost-effective to do
> > only a ring change on a waterboxer? Or, does he have to go in there
> > and bore-align the case, put in near bearings... basically do a full
> > rebuild. The answer for Blake's situation will give me info on how to
> > deal with my own situation and help me decide when/if I should crack
> > the case on engine #2 to change only the rings, or just go ahead with
> > the rebuild on engine #1 with a full bore-align. I have a 1.9L
> > waterboxer, both engines.
> >
> > On Sat, 26 Jun 2004 14:37:41 -0500, Blake Thornton
> <blake@math.wustl.edu>
> wrote:
> > >
> > > I am afraid that my 84 might need some serious engine work. Here
> are
> the
> > > symptoms:
> > >
> > > - When I start up the van, it blows a lot of grey smoke initially.
> Quite
> > > a lot and it keeps getting worse. After the van is warmed up, the
> van
> > > runs alright.
> > >
> > > - I just changed my spark plugs. 3 of the 4 were pretty oily. I
> had an
> > > exhaust leak and took off the forward most exhaust pipe. The pipe
> was
> > > pretty oily and black.
> > >
> > > - Lately, my vans wants to stall out when cold, which leads me to
> needing
> > > to keeping my foot on the pedal when I am driving. This seems to go
> away
> > > when the van gets warmed up.
> > >
> > > I am thinking that my rings are probably shot. My engine has
> 160,000
> > > miles on it (with probably around 20K on new head gaskets). What
> are my
> > > options? I am thinking that I can probably just run this engine for
> a
> > > while longer (assuming I pass emmissions) and see about finding a
> used
> > > engine or something soon.
> > >
> > > Thanks for any input you can offer!!
> > > Blake
> > > 84 Westy
> > > St Louis
> > >
> >
>
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