Date: Fri, 16 Dec 2011 13:24:16 -0800
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: 1.9L WBX Compression Test Question
Content-Type: text/plain; format=flowed; charset="utf-8"; reply-type=original
hi,
re
the two rear cylinders measured 155 on each side, the two front cylinders
measured 65. So, the engine sounds pretty OK and runs OK. "
100 psi is considered the lower OK limit.
Running long term with two cylinders that low likely will contribute to the
faster wearing out of the engine overall.
you could do a leak down test to further narrow it down to heads or
cylinders,
and..
something to consider when you have opposite cylinders equally low like that
is worn out cam lobes ..
as one cam lob runs both cylinders.....1 & 3 in the case...one exhaust cam
lobe, one intake..
a flat intake cam lobe would 'fit' for example.
so consider that.
I have not seen any 'for sure' waterboxer cam lobes however..
in many dozens of wbxr engines...
You should consider that for sure.
and I nice thing to do btw ..is put in a 2.1 wbxr.
They'll go in nicely ..
and run very nicely off your Digijet Fuel Injection.
My own personal 85 Adventurewagon has that set up ( manual trans though ) ..
2.1 long block and heads..
2.1 exhaust and intake runners and plenum, and throttle body ..
and running off Digijet just fine.
I even have an oil cooler/heat exchanger plumbed in ..
something you normally don't have with a 1.9 ..
and my engine works great.
on a recent 1,300 mile later summer trip .....it went up almost all hills
between 45 and 65 in 4th gear,
rarely had to use 3rd on hills..
and returned a solid 20 mpg on regular unleaded.
and for the volume inside that rig, and the quiet and smooth aerodynamics ..
can't complain much at all.
a nice do-over with a 2.1 would be a nice way to go.
the auto trans eats up fuel a bit though.
Scott
www.turbovans.com
----- Original Message -----
From: "Skip" <skiplaubach@COMCAST.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, December 15, 2011 6:08 PM
Subject: 1.9L WBX Compression Test Question
'84 Westy, 1.9L WBX, Manual Trans
Runnability issues continue. A couple of weeks ago (after replacing the ECU
and Temp II sensor, and smooth running for 100 miles and good warm starting)
the van was sputtering/losing power, then stopped. Wouldn't restart. Had
my second tow with AAA Premium, this time to my mechanic. When we
off-loaded the van at the mechanic's, the van restarted...I left it with the
mechanic to check over. He identified the usual (hoses that need to be
replaced, etc.), but couldn't figure out the runnability issue. He has a
very good reputation, so I don't doubt his expertise. So he did a
compression test on the cylinders. Results were interesting and I would
welcome recommendations for further study or repair: the two rear cylinders
measured 155 on each side, the two front cylinders measured 65. So, the
engine sounds pretty OK and runs OK...sometimes, and I would guess that the
reason is that the compression is the same on opposite cylinders. So has
anyone experienced this phenomenon or can recommend "steps" toward a
correction? I stopped my an automotive machine shop today and was quoted
about $1500 (labor) plus parts (which include cylinders). BTW, no head
gasket leaks. Thank you.
Skip Laubach
Elgin, IL
| 
