[T3] Trouble home from Bugorama

Keith Park topnotch at nycap.rr.com
Thu Nov 5 17:09:40 PST 2015


Ya know, I went thru and enjoyed probably 50 pictures of that nice
california car of yours before I even noticed what was in the garage...

:-)

Keith


Topnotch Restorations
topnotch at nycap.rr.com
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback  "Hothe"
65 Notchback  "El Baja Rojo"
93 RX7  "Redstur"
87 Golf  "Winterat"
 

-----Original Message-----
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of Jacob Adam Schroeder
Sent: Wednesday, November 04, 2015 10:04 AM
To: type3 at vwtype3.org
Subject: Re: [T3] Trouble home from Bugorama

After nearly two months to cool off (and repeated thoughts to simply throw
in the towel and sell the car--which I may ultimately do, but not yet), I
finally dropped the engine and stripped it down to find out what happened.

I had zero compression in cylinder 2 because the exhaust valve broke.  If
you are interested in seeing the carnage, here it is:
https://picasaweb.google.com/lh/photo/pXLI0Qm-N97Lyzj7FkY5qNMTjNZETYmyPJy0li
ipFm0?feat=directlink

So this leaves me with a ton of questions for the list, but the biggest one
is "now what"?  Moving forward, is this simply an issue of taking the head
to somebody skilled with VW heads to have them replace the broken valve and
then I can reinstall the head and carry on?  Is this something I can do
myself in my garage or does this require specialized tools and skills?
Also, is there anything else I should do to piston/cylinder 2, which don't
appear to have any noticeable issues?

Next, where did the rest of the valve likely go?  Did these get blown out
the exhaust?  Is that part of the crud I see in the top of the cylinder
head (melted valve)?

Once I am on the other side, what was the likely cause of a broken valve on
cylinder 2?  Overheating due to pushing the engine too hard?  I thought
most of the time cylinder 3 is our weak spot.

Thank you,

Jacob


On Sun, Sep 13, 2015 at 11:11 PM, Jim Adney <jadney at vwtype3.org> wrote:

> On 13 Sep 2015 at 9:57, Jacob Adam Schroeder wrote:
>
> > It was worth a shot, but I didn't observe anything unusual about
> cylinder 2
> > over cylinder 1 when I performed this test.  It was cool to see the
> valves
> > open and close.
>
> If you were able to actually put a finger on each rocker and compare
> the action between them, then those parts must be okay.
>
> It might still be useful to verify that #2 is getting spark and the
> right amount of fuel.
>
> It's easy to test spark by putting the inductive pickup of your
> timing light on that lead and making sure it flashes.
>
> Checking for the "right" amount of gas is harder. You can verify that
> the #2 injector is working by opening the throttle with the ignition
> ON but the engine not running. This will trigger one pair of
> injectors. You can hear them click and feel it, too, if you  put a
> hand on the injector. If #1 clicks, but #2 doesn't, rotate the engine
> enough to advance the dizzy by 180 and repeat.
>
> Checking for too much fuel (injector not closing) is different. Start
> the engine, then unplug the #2 injector and see if the engine speeds
> up after a bit of time. If so, it was just flooded.
>
> Anything that causes that cylinder to not fire can lead to carbon
> buildup on the valve seats and zero compression. You might still fix
> this without an engine rebuild. A burned valve is still a
> possibility, but it's not the only one, and it's a rare one in #2.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
> _______________________________________________
> VWType3.Org mailing list - type3 at vwtype3.org
> To unsubscribe or change subscription options, visit:
> http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
> If you need more help, contact: gregm at vwtype3.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.vwtype3.org/pipermail/type3-vwtype3.org/attachments/20151104/f
f2b8161/attachment.htm>
_______________________________________________
VWType3.Org mailing list - type3 at vwtype3.org
To unsubscribe or change subscription options, visit:
http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
If you need more help, contact: gregm at vwtype3.org



More information about the type3-vwtype3.org mailing list