Date: Sat, 18 Sep 2010 13:21:22 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Update and question inline VW Van block swap (in progress)
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hi don,
I wrote to you once explaining the OP sw. on the oil filter flange, if it's
what it originally was..
is reverse logic of what you want for a regular OP warning circuit on an
early van.
Don't mess with that OP switch. It doesn not supply ground when there is no
oil pressure, like you want.
what you would want to see is ground supplied by the OP sw at the end of the
head.
rig up a test light so it's looking for ground.
if the head OP sw does not supply ground, find another OP sw or whatever you
need to do, to have an OP sw there that supplies ground.
to check your dash circuit, ground the blue/blk van's OP wire .
the dash light should be on, key off.
if you really have 10W ..
wow. must mean 10Wsomething , like 10W30..
I don't see how lighter oil cleans or flushes better really.
Some cheaper oil to run for the first hour or so of a new engine is a great
idea though.
I can't say this enough ..
ignore that there is any OP sw on the oil filter flange !!
replace that with a bolt or plug.
it just so happens the diesel and inline four flywheel mounting bolts are
the same thread as that OP sw ...they make good plugs for the flange
threaded fittings. Some lock-tite as a sealant perhaps.
a basic oil pressure circuit is REAL SIMPLE..
not any more complicaed than a tail light.
if OP is below whatever the threashold is ..
it's about 7 psi ( convert the bar to psi for the actualk # but it's close
to that ) ..
the switch provides ground, turning on the light.
right at the threashold it will flicker.
here's a *perfect* method to set the timing .
as long as it idles fairly smoothy..
turn dist counter clockwise advancing timing until it's *way* advanced ...
like when, idle speed doesn't go up as your turn it more, you're probably at
45 degrees TDC..
then turn it clockwise ..
until it's *way* too retarded and almost dying.
do that back and forth a few times,
put the distributor right in the middle of those two extremes..
the timing will be nigh perfect.
if it pings, retard a bit of course.
I'd run mid-grade at first, sorting it out, since your CR might be higher
than normal.
have fun !
Scott
www.turbovans.com
----- Original Message -----
From: "Don Hanson" <dhanson928@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, September 18, 2010 11:19 AM
Subject: Update and question inline VW Van block swap (in progress)
> Good morning all.
>
> I got my 'new' motor in and running pretty well. Some glitches solved
> and one remains that I can use an electrical Guru's guidance with, if
> anyone could. My Oil light.
>
> Here's the relevant information: 84 Vanagon with (formerly) a 1.8 liter
> Cabriolet inline four motor ('92m.y. I was told) Digifant operating
> system. I replaced the lower end with an ABA 2.0 Jetta motor 93m.y. but
> kept all the head and everything else from the older 1.8liter. So I have
> a
> different oil pump now than before, the one from the Jetta with an
> incorporated water/oil interface(not being used).. Now I get "backwards"
> behavior from before from my idiot light on the dash..
> .No light up when the key is on but not started. (The other indicator
> lights behave as before...Alternator and O2 sensor on, then off after
> start
> and a little increase in RPM. The oil pressure warning light,
> however...stays dark with key on-- motor off.)...then it lights up
> (flickering sometimes) when the motor starts and gets brighter as RPM (and
> I
> assume oil pressure) increases....I have some 10w oil in there right now
> as
> a peliminary wash-out oil so it is pretty light. Ok so when the motor is
> really hot and idles down low....the light flickers OFF....Like when the
> oil
> pressure is low, the warning light goes OFF and when it's high, the
> warning
> light comes on. Wassup with that?
>
> I have a no dynamic oil pressure gauge system...just that idiot light..I
> have tried plugging the sender wire (from the main harness up to the dash
> light) right onto the spade connector on top of the oil filter flange....I
> have also tried putting that wire onto a spade connector that comes from
> the
> front of the motor's head...and I have tried connecting both of those
> spade
> terminals to the instrument light plug at the same time...It is just
> backwards. Light bright when oil pressure is high/light off when OP is
> low..is there a way to reverse the action of the lamp?
>
> I plan on testing my oil pressure with a real gauge soon as I get to it,
> but until then, I would like to have a functioning warning system. Should
> I
> just take the filter housing mount off my old 1.8 liter block and use
> that?
> That seems reasonable but I think I will eventually hook up some plumbing
> to
> the little heat exchanger at the oil filter and get that working ...so if
> I
> can just swap some wires or change polarity or some "electrical thing"
> that
> would be good...
>
> The motor sound really good and strong and quiet in the internals. I had
> to swap on my old water pump because the Jetta one was noisy and I had a
> few
> water and gasoline leaks on start up (fire extinguishers close at hand for
> that event) Then she was overheating till I bled the rad again...And she
> is
> timed by "Ear" since I have no timing light...I have a few more wires to
> clean up and then I am going to go for a test spin....
>
> Thanks, if anyone can help with that oil pressure idiot light's
> bass-ackwards behavior..
>
> Don Hanson
