Date: Fri, 3 Oct 2003 16:02:08 -0400
Reply-To: Hans Brouwer <h.brouwer@SYMPATICO.CA>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Hans Brouwer <h.brouwer@SYMPATICO.CA>
Subject: Re: Compression test on 1982 aircooled westy
Content-Type: text/plain; charset="iso-8859-1"
I had the same problem with #1 cylinder on our 86 Westy.
After the compression test (150, 150, 150, 135), I changed the cap, rotor,
plugs, and wires but number #1 still did not work. Frank Condelli suggested
to check the fuel injection wires by unplugging the electrical injector
plugs. Sure enough the problem was a break in the negative wire to the #1
fuel injector.
In your case a quick check is to take the #3 injector plug and plug into #4.
If #4 works after this swap than it is a break in one of the white wires (on
the '86 all the wires are white, yours might be different).
In my case since both wires are white on the plug, I used a double test
light to see if it was the + or - that was faulty. Since all the negative
white wires join together somewhere in the harness (same counts for the
positive white wires), I just spliced in the negative wire from #2 cylinder.
Where do all these white wires join?
I did this fix this morning and the Westy runs great again..
Good luck,
Hans Brouwer
Cumberland, Ontario
69 Bus (Speedy)
86 Westfalia (Slowpoke)
92 Cabriolet (for sale)
----- Original Message -----
From: "David and Shirin" <daveshirin@ENERGYUNITED.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, October 03, 2003 3:13 PM
Subject: Compression test on 1982 aircooled westy
I have been having problems with my 2.0 aircooled engine since halfway back
from our trip to the Outer Banks in August. I just now had the time to
really check into it. I assumed the worst and was preparing for an engine
rebuild, assuming we had burnt a valve, or cracked a head. The symtom was
the engine was only running on three cylinders. Number four cylinder was
not doing anything and its plug was badly fouled out. Installing a new plug
had done nothing.
So before pulling the engine I did a compression check on all the
cylinders, hot and cold, wet and dry wet meaning I added 1 tablespoon of oil
down the sparkplug hole.
Bently manual compression check values for this engine are taken with a
minimum oil temp of 86deg F
Compression pressure values, 87-131psi
Wear limit bar 73 psi
Maximum permissible difference
between all four cylinders 44psi
#3 120 cold dry #1 130 cold dry
125 cold wet 135 cold wet
123 hot dry 125 hot dry
125 hot wet 135 hot wet
#4 145 cold dry #2 145 cold dry
150 cold wet 150 cold wet
130 hot dry 125 hot dry
140 hot wet 140 hot wet
It is definitly not firing on cylinder number four at all. So we have
spark, we have compression, what could be missing???
David White
1982 aircooled Westy
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