Date: Mon, 12 Jul 1999 07:58:04 -0400
Reply-To: Bulley <gmbulley@BULLEY-HEWLETT.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Bulley <gmbulley@BULLEY-HEWLETT.COM>
Subject: Re: motor rebuild update
Good call, Eric-
I was actually very concerned about this very thing. A number of years ago,
I installed an oil cooler on a 1976, and in the winter, it took forever for
the oil to warm up.
This time I did a little research, and came up with an "Oil Stat" brand oil
thermostat from Mark Stephens High Performance. The new oil circuit still
includes the stock VW cooler. Our circuit starts where the oil filter used
to be, goes through a remote oil filter, about a foot away, then to the oil
thermostat. At that point, if the oil is below 180 degrees it is shunted
directly back to the motor through the fitting where the filter used to be.
Essentially, about 1% of the oil will still flow through the coolers, but
not enough to affect warm-up.
As the temperature in the oil rises above 180, the thermostat gradually
closes, and oil flows increasingly through the oil coolers. At about 210,
the thermostat is completely closed, and all of the oil flow goes through
both coolers before returning to the motor.
While I don't have a gauge on the dash, (I use the hand-on-dipstick
method), I would feel comfortable taking this van across a burning desert
with a load of folks at 75mph without rising oil temps.
G. Matthew Bulley
Bulley-Hewlett & Associates
www.bulley-hewlett.com
Cary, NC USA
888.468.4880 tollfree
-----Original Message-----
From: EMZ [SMTP:vw4x4@fyi.net]
Sent: Monday, July 12, 1999 7:28 AM
To: Bulley
Cc: vanagon@GERRY.VANAGON.COM
Subject: Re: motor rebuild update
I have a comment about the oil cooler. Oil does not lubracate
until about 150 deg. In the died of winter this oil is going to
be like glue! Do you have any way around this?
Eric 86-VW4x4
vw4x4@fyi.net 72-240z
Pittsburgh, PA USA 1936-Chrysler
On Fri, 9 Jul 1999, Bulley wrote:
> Folks-
>
> Just got back from T-Hoff, in Raleigh, the folks doing the machine work
on
> our 1982 Westfalia Motor. For those who are interested in such, here are
> the details.
>
> The balancing of all the parts is now at zero grams across and along the
> crank, including the fan, flywheel and pressure plate. Even though our
new
> counterweighted crank was (nearly) zero to start with, the flywheel was 3
> grams off, and the fan was 8 grams off.
>
> The rods are a matched set now, and balanced end to end. Three of the
rods
> were close to spec (off by .75 grams here or there) One of them was
> obviously from another set, and was WAY out.
>
> The alignment on the block is perfect, and they have cleaned the entire
> block, and bead blasted the outside (aesthetics, mostly).
>
> The pistons and cylinders were trashed. Ordered a set of MSHP 96mm
> pistons/cylinders...their website claims 25-30 hp increase: (From their
> site) "BOLT ON HORSEPOWER!!!
> NOW YOU CAN ADD 25 TO 30 HP
> WITHOUT SPLITTING YOUR CASE -- Street and track tested. Super strong
> hypereutectic pistons. Flat top with valve relief for performance cams.
> Slipper skirt can be used with up to a 78.4 stroke with stock rods
without
> clearancing cylinders. Heat/corrosion resistant coating. Compatable
(sic)
> with standard fuel injection. Cylinders are torque plate honed for in-use
> roundness. Plateau finished for pre break-in. Available for both 66 and
> 71 stroke engines.
>
> 96MM PISTON & CYLINDER KIT $ 349" (end of quote)
>
> I am not holding my breath, betting on +30 hp, but it should be a bit
> punchier. Since we are adding two auxiliary oil coolers, 40-feet of
copper
> oil line, and an oil thermostat, I am not worried about the little extra
> heat from the 96's. The pistons will be balanced when they arrive.
>
> The heads were close to being trashed. They had to do some back-fill
> welding to fix two dropped seats and a couple burned spots. We *almost*
> used one as a boat anchor, and the other as a door stop, but Kerry and
> Jason at T-Hoff assured me they can be good as new...so they are still
> working on them. New guides, seats, valves, and a slight flycut to smooth
> things out.
>
> We get everything back from the shop on Wednesday or Thursday, and that
is
> about when the pistons will be here, so it may be a late night Thursday
and
> Friday. Then we can throw it all back in the van on Saturday/Sunday.
>
> In the mean time, I have all of the copper lines installed under the van,
> and will install the coolers up front in the coming evenings. I won't
mount
> the oil filter relocation or the thermostat until the motor is in place.
I
> have some ideas of where I want to route things, but want to measure
twice
> and cut once.
>
> Will keep you posted.
>
> G. Matthew Bulley
> Bulley-Hewlett & Associates
> www.bulley-hewlett.com
> Cary, NC USA
> 888.468.4880 tollfree
>
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