Date: Mon, 31 Mar 2008 09:09:12 -0400
Reply-To: Bob Donalds <donalds1@VERIZON.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Bob Donalds <donalds1@VERIZON.NET>
Subject: Re: New oil pump not snug in case
Content-type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original
Pascal
That's my thinking on the aftermarket oil pumps as well.
If the wear marks are on the top right side of the OEM housing then I reuse
them.
I have compared the pump housings and they seem to measure the same BUT they
are loose in the case as you stated and the loss of pressure around the
housing is of concern
I wrote this a little over a year ago to doug in Ca. It covers a little more
than pumps but it is relivant
> 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 gasket 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 but it measures .006ths or more rather than .004ths as
> the type one
> gasket does. the distance of the cover to the pump gears 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 ge 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: "Giasson, Pascal (DNR/MRN)" <Pascal.Giasson@GNB.CA>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, March 31, 2008 8:04 AM
Subject: New oil pump not snug in case
I have a new Schadeck 26 mm oil pump that I dry fit in my 1.9. It goes
in much easier than the OE one that I took out. My original one had
some wear in one location where the top gear rubbed on the pump body.
My understanding is that the pump body needs to fit tightly in the case
opening so the oil galleys of the pump and the case fit tightly
together. Anyone run into this before? Any suggestions? My concerns
is that the new pump may not be much of an improvement over the old one
if the galleys are not snug. Thanks
Pascal
'84 Westy
