Date: Thu, 27 Mar 2003 09:13:22 -0500
Reply-To: John Lunetta <blun1432@OPTONLINE.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: John Lunetta <blun1432@OPTONLINE.NET>
Subject: Re: replacing noisy lifter for 91 multivan
Content-type: text/plain; charset=iso-8859-1
I had this same problem with my 90 vanagon 2.1. It turned out that on close
inspection of the valve train I noticed that the the rocker on the valve
that was making the noise had play from mside to side. The adjusting screw
was hammered unevenly where it makes contact with the valve stem. This was
do to the wavy washer that keeps that rocker from moving side to side was
broken and actually i found part of it stuck to the inside of the valve
cover. The parts are cheap. I removed the whole valve train as an assmbely.
You need some one to hold it for you in order to take off an reassemble the
clips that keep it all together. When you put it back in the engine you must
make sure the pushrods are seated firmly in there lifters. It helps to put
wheel bearing grease on the ends of the push rods so that they stay in place
while you reassemble. Torque to specs. You can set up engine to put it at
top dead center and any other positions by observing the distributer. On the
out side of the distrbuter body mark the location of the cylinders with a
marker. 1234. Looking at the engine from the back of the van no. 1 piston is
on the right at the back of engine flywheel side. no. 2 is in front of that
one, no 3 is at rear of engine on left side. no.4 is in front of that one.
Adjust valves in 1,2,3,4 order. Align rotor with no 1 firing pos. pulley
groove aligned with center line of case joint on block. adjust no 1. turn
engine and align with no 2 firing pos adjust no 2. so on till all four are
done. If the problem was only on one side of engine, you just have to do
that side. I discovered this only after trying mmo, thicker oil, using VW
oil filters, adjusting all valves twice. nothing worked. It went on for
about 10,000 miles before I found the broken washer. I did this repair last
Aug and it has been heaven since. Only rarely will I here some tapping on a
cold start if the van has not been used for a few days. But it qiuckly goes
quiet after about a minute of less. I used the adustment specs in the
bentley manual..
180 deg means 90 deg of distributor movment.
If you take out the spark plugs you can easely turn the engine with the
drive belts buy hand.
Good Luck.
John 90 vangon gl 193,000 miles same engine.
----- Original Message -----
From: "Kun Chang" <Albert3365@WMCONNECT.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, March 26, 2003 11:59 PM
Subject: replacing noisy lifter for 91 multivan
> The light tapping noise on starting the engine been going on for a while,
but
> this time it just keep tapping very loud, and no sign of quiting. I have
try
> the MMO trick, did not work. Because of the different tapping pattern this
> time, I am hesitate to drive it on the highway for 10 - 20 minutes, afraid
> that too much heat might burn the head gasket. I have therefore decide to
fix
> the source by replacing the possible collapsed lifter. It doesn't seems to
be
> too difficult to do. I have the Bentley manual to refer to and have
obtained
> lots of information from the Archieve. However, there are several simple
> things just cannot be found in the book.
>
> 1. When I turn the cranshaft to set cylinders 1, 2,3, and 4 to TDC, how do
I
> know which valves/lifters belong to which cylinders?
> 2. My vanagon has auto trans, do I turn the center large pulley bolt to
> rotate the cranshaft with the transmission in neutral? This bolt is really
> big.
> 3. The manual says rotate cranshaft 180 degree, and adjust the next
cylinder.
> Does it mean clockwise direction? Can I judge my watching the distributor
> rotor?
>
> Any suggestion will be really appreciated.
>
> Albert
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