Distributor Cap Wiring for Wisconsin VH4D

 

We have a Ditchwich Circa 1960 something with a Wisconsin VH4D, Spec 408206,
Serial 5804809 engine. Please be kind with me as my knowledge of engines is
pretty minimal.

After trying to get it to start for some time we replaced the Distributor
Cap, Rotor, Wires and plugs, air and oil filters, and coil.  We labeled all
the wires for the plugs and are pretty sure that we have them all in the
right place, though would like to be sure.

There also seems to be quite a bit of back pressure in the engine and every
once in a while trying to start it , the Dipsick will shoot out. I'm not
sure if that could be caused by the miswiring of the plugs or not.

Does anyone have this unit and could they tell me where the wires should go?

Thank you,
   Scott<-

 

Anybody with a great last name at least deserves me to try my best.

I've no specific knowledge on this engine but that dipstick blowing out
leads me to suspect a more serious issue with the engine. I'd suggest you do
a compression test on each of the cylinders. When I've crossed plug wires
before, I've always gotten a great deal of popping sound and backfiring
through the carburetor. What's it doing when you try to start it?


--
<(©¿©)> An apple a day keeps the doctor away.
    Two apples a day gets the doctor's OK.
 Five a day makes you a fruit grower like me.

Karl Townsend

 

Hey Karl,

As I mentioned before, I pretty much show not be working on an engine with
the amount of knowledge I have on them... Ask me to build a PC and I'm down
with that...

So when I start it up, its not at a point where it sputters, I can see a
Spark from the Plugs, which I was not getting before.  I can see gas in at
least 2 of the chambers The left 2 As you are sitting behind the engine.

I wouldn't know a carburetor if it bit me on the hand. And as far as a
compression test, er um. Can I use my Cat 5 RJ45 Crimper for that?  (-;

My ear still hurts from the popping that emanates from the backfire that
comes out of the place that the oil goes in. Oh and the Oil Cap is also not
on either, as it keeps popping off too.

Thank you for your assistance!

Scott<-

P.S.
   Cool Last name!

 

Scott Townsend wrote:

Sounds like you have either got broken rings in one cylinder or a hole
in the piston..... it's about the only way you will get an explosion in
the oil sump. I'd say the rings have been the primary cause of your
problems all along.

 

wrote:


Yup, you probably have a hole in the piston.  There should be no
communication of air-gas mix into the crankcase below the pistons
enough to ignite.  My brother had the same thing happen to one of
those Pontiac overhead cam straight sixes back in the late '60's.  He
was running at very high revs when he heard CHUFFA - CHUFFA - CHUFFA -
BLAAMM!  It blew off the oil filler pipe.

There's plenty of info on the web to educate yourself about engines.
http://library.thinkquest.org/C006011/english/sites/ottomotor.php3?v=2
has an animation of what's going on.  Now imagine if you get a hole in
the piston.  Instead of compressing, you'll gradually pump the
crankcase below the piston full of fuel-air.  When the fuel-air mix
gets enough fuel to support combustion, the sparkplug sets it off.

Pete Keillor