[Vwdiesel] temp gauge/sender

[LBaird119 at aol.com]

>  068 103 373 M    Also there is a
>  circular symbol that  shows a arrow pointing to a 1
>  then a 8 over a 9 then a "3" face down in the circle.
>  My question is what year engine is this?

  That's just the head, not the engine.  I've seen that number before but
don't remember which series it is.  It doesn't narrow it down much.
The revision "M" is the closest to a determining factor of what it came
on.  I knew how to read those date clocks once but it's hard enough
when you can see them!
  I just checked ETKA and all the heads there are 351 with various
revisions.  Maybe that recollection was from a new/aftermarket head?
  The engine code is on a flat spot on the block, right below the head,
between #3 and #4 cylinders.  The two letters will give the series, perhaps
the numbers will denote a date.  Probably just a serial number but then
those of us with known, original engines might be able to work up an
approximate date from that. :)

I think the guy who cobbled this
>  engine into the car was a bit crazed & and so far I've had to connect
things
>  the proper way on the fuel system ect... I'm & trying to hook up the temp
>  gauge and I have found the plug under the hood that goes to it. the
>  plug is  the black rectangle with two small connectors on the
>  inside. The problem is I can't find where to plug it in to. I think
>  that the engine most likely is from a earlier & car ( mine is a '89
Jetta).

  It plugs onto the sensor on the end of the head nearest the transmission.
Most of us have two sensors in the adapter between the head and the
hose.  You apparently have the plug for a later, dual sensor but the
two sensor adapter?  You could make an adapter plug, splice in different
ends, (female spade) or get the different adapter and sensor from a
wrecking yard or even dealer or aftermarket.

> I
>  also cannot find where to plug the Altitude  compensation Vac. line into as
>  there seems to be no place for  that either near the injector pump. I want
> to

  If you have an altitude compensator, you'll also have the aneroid like on a
TD.  The line just connects to what is the vent on the TD and the lid is then
plugged.  That's the biggest part of it. There's the "pressure regulator" and
filter that mount on the inner fender or something.

>  make sure the auto cooling fan for the engine works too.    TIA Jeff
>
  Easiest way to do that is after driving the car, lift the hood and stand
there, heater and fan off and wait.  If the weather's cool then you'll need
to rev the engine a bit or youl'll be there a long time!  Check the temp
gauge from time to time and see if/where the fan kicks on.  You can
stick a candy thermometer, or one that is designed for up to about 250F,
into the reservoir at that time and you'll know the temp the fan kicks in at.
Likewise for when it kicks off.  I wouldn't run it with the cap off though,
until the thermostat's for sure opened up.  If it has a hot stat in it, it
may
not open without that added pressure.
     Loren