Date: Sun, 30 Mar 2014 16:43:21 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: Replacing the Head Gaskets (Maybe the Head)?
In-Reply-To: <CAAymtAZs8ZiG+Xz41Yi5=L7yfumF-us7nRoL-VprQ4wEvNn6vA@mail.gmail.com>
Content-Type: text/plain; charset="us-ascii"
With that much coolant getting into the combustion chamber you need to look
for something drastic. As this was sudden I would suspect a cracked head
including the exhaust port. If the engine stops with that valve open the
cylinder will get filled. As this was likely progressing for some time don't
be too surprised if you find a damaged piston and scored cylinder wall. If
this is a head gasket, (inner) the real failure is one or more studs. You're
not going to know all until it is pulled a part. Assume some antifreeze in
the oil so after the repair do a number of oil changes. Antifreeze in the
crankcase in small quantities that cannot be seen can be devastating to
bearings. Also consider the O2 sensor and catalyst to be damaged.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Paul Smith
Sent: Sunday, March 30, 2014 4:31 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Replacing the Head Gaskets (Maybe the Head)?
Yesterday I started the van (89 Westy GL, 2.1, manual transmission) let it
run a moment or two as everyone buckled in and got about 20 feet down the
road when I noticed billowing white smoke/steam around the back window.
Reversed back into my parking spot, jumped out to see that it was coming out
of the tailpipe and shut the van down. Altogether the engine ran for maybe 3
minutes. We used the other car to run the needed errands, but got back too
late to look into the van any further. This morning I opened the engine lid,
checked coolant levels and the oil for evidence of coolant. All appeared
normal, but it had all night to cool down. I decided to try a quick startup
and get a better look and sniff of the steam. The starter engaged solidly
but the engine did not turn (or turned a very small bit then locked). I shut
off immediately and pulled all 4 plugs and manually turned the crank, which
did turn easily. About 1/3 cup or so of coolant was pushed out of the spark
plug hole of the passenger side front cylinder (that plug was dark and wet
when pulled). Liquid won't compress, so the engine didn't turn.
I'm assuming best case is leaking head gasket(s), sucking coolant in on the
intake stroke to cause the smoke/steam and then sucking the 1/3 cup in as
the engine cooled overnight. Next worst case is cracked head. Most worst
case is any further damage.
I have two basic questions:
- Do my assumptions seem correct (blown head gasket, etc.)?
- How hard is it to replace the head gaskets on the passenger side?
The engine is a rebuild (from Boston Engine according to the paperwork) with
about 65,000 miles on it. I've replaced brake lines, power steering lines,
water pump plus normal maintenance work, have metric sockets and
wrenches,torque wench, dremel. I think I might need a small torch for the
exhaust nuts and bolts. I have the Bentley manual. I have some mechanical
experience, but the last time I had the head off an engine was about 30
years ago on an air cooled parallel twin motorcycle (easy to work on). In
addition to the gasket set I plan on getting an exhaust fastener/gasket set
- any other items I should do (maybe replace the coolant hoses)? Any advice
on special tools or gotchas to watch for? I'm in South Carolina and the only
two vanagon mechanics within 100 miles retired awhile ago.
Thanks,
Paul
|