Date: Sun, 17 Apr 2005 20:26:41 -0400
Reply-To: ROBERT DONALDS <donalds1@VERIZON.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: ROBERT DONALDS <donalds1@VERIZON.NET>
Subject: Oil pump sealing questions... and more
Content-type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original
this went out to the list a while ago and I think its worth posting again
Doug
freeway driving is when you see the most crank case pressure so that's when
the oil is forced out of any possible opening but with a new engine you
should avoid the freeway for the first bunch of miles to avoid damage to the
rings.
wash it up and see there the oil leaks from without driving it the wind
moves the oil every place raise the idle if need be.
I have found that new pumps and cover are often not flat and aviation
formagasket wont cure that.
the self sealing nuts for the oil pump loose there torque rather
quickly when the plastic heats up and softens up I never use them. what
sucks is that you cant get at the cover nuts when the engine is in place and
its many hours to access the dam cover .
the other spots are the dip stick tube where it sits into the case you had
a green oring in the gasket set for this and a little silicone would be a
nice touch in the same spot. Its almost impossible to see the old gasket is
still in the case. The pulley seal is a common leaker did you scotch bright
the seal surface on the pulley to get rid of the build up of varnish and
crud and did you go to the dealer and get the oring for the crank pulley
that does not come with the gasket set. The front pulley needs to be torqued
to 252 pds or it comes loose and could be leaking. there is a plug in the
front of the case its pressed in and can leak I put a bead of silicone
around the edge as im prepping the case. I use a scratch brush to prep the
sealing surfaces of the case half's and run a file over the surface to check
for burrs. case prepping can take most of a day.
Then I install the oil pump I use a bead of silicone on the inner pump
flange after I install the gasket on the pump before I install the pump into
the case. I throw the gaskets away that comes with the gasket set for the
oil
pump cover. The reason I do this is that although it has the same part # as
the type one gasket it measures .006ths rather than .004ths as the type one
gasket does. the distance of the cover to the pump gears helps determines
the oil pressure warm. the thicker the gasket the lower the pressure. to
seal the outer cover I draw the thinnest bead possible of silicone on the
outer edge of the oil pump cover gasket with it sitting on the cover itself
as a palate. next I flip the gasket into its final resting place on the
cover with a razor blade and coat the second side of the gasket again with
the thinnest bead around the outer edge of the gasket. I try to avoid
getting any silicone into the pump or gears once the cover is installed onto
the pump I draw a bead of silicone around the studs and with a wave washer
and a new 8 mm nuts I bring the cover tight onto the pump in a criss cross
fashion this spreads the pressure over the pump cover and drives the pump
the rest of the way into the case I don't use a torque wrench but Im sure it
most of 20 pounds when Im done tightening the 4 nuts
good luck
at a parts store you get only parts
at Boston Engine you can get the rest
going faster miles an hour with the radio on
I remain
Bob Donalds
http://www.bostonengine.com
all rights reserved
----- Original Message -----
From: "Donald Adams" <donald65@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, April 17, 2005 11:52 AM
Subject: Oil pump sealing questions...
Hi, I'm putting together my first 1.9 engine and have a few questions.
a>There are two oil pump gaskets in my gasket kit. Bentley shows only
one on page 17.7. Do I put one gasket between the block and oil pump
housing and the other between the oil pump housing and the oil pump
cover? What kind of sealant is best to use here?
b>Bentley says to use new SEALING NUTS on the oil pump. It this what
most people do? Or can you just re-seal them with RTV or similar?
-Don