Date: Wed, 8 Sep 1999 07:11:18 -0700
Reply-To: Coby Smolens <cobys@WELL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Coby Smolens <cobys@WELL.COM>
Subject: Re: An Introduction and noise question
In-Reply-To: <19990905143051.7170.qmail@hotmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi Dennis,
Sorry to be so long replying - this sat in "drafts" for a couple days and I
forgot it was here...
Is the noise synchronous with engine speed?
Sounds like the fan may be rubbing against the fan housing - look for fine
powdered aluminum around the fan, or a worn spot on the fan or housing. A
bit strange that the noise should come only after 20 minutes running though.
All around I'd say your engine is not sounding too healthy. Normal
compressions on an air-cooled 2.0L should be around 135/cyl, although 120
would be OK if they're all even. 90 - 110 is too low and 65 is off the
scale. I would have recommended doing a "wet" test, i.e. squirting oil in
the cylinders and trying the compression test again. This might be followed
by a valve adjustment to check for sinking seats. I guess you could still do
one, but you'd need to rig up a bell housing/starter on the engine. Or just
throw the engine back in enough to do the testing. Or just tear it down -
it's going to come to that anyway.
There's not really a GOOD way to restore power in one cylinder, especially
when all the others are so far out to lunch. If the other readings were all
135, you might think about replacing the bad head (probable cause if one
lone cylinder's low) and leaving the rest alone, in a pinch.
But as long as you're taking the thing down to the short block for
inspection purposes, you've got a great opportunity to fix all the other
stuff that needs attention. The end float should definitely be checked,
along with the lifters, cam, rod bearings
I suspect the air shrouds may need some work, maybe the flaps - the temps
you're talking about are not what they should be, even for a rolling toaster
like the AC 2.0. With a clean oil cooler, properly installed flaps, complete
set of correctly installed shrouding tin, properly functioning EGR system
and engine compartment sealing in good shape your van should not go over 220
except in extreme conditions. They do run warm, but normal around-town temps
should be 200+/- 10 degrees.
Coby
Valley Wagonworks
"Intimately acquainted with VW Vans since 1959"
Volkswagen Bus, Vanagon, Westfalia and Eurovan
Repair and Service Specialists
1535 Sir Francis Drake Blvd., San Anselmo, CA 94933
Voice:(415) 457-5628
Fax: (415) 457-0967
http://wagonworks.com
mailto:contact@wagonworks.com
...
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
> Of Dennis Coggia
> Sent: Sunday, September 05, 1999 7:31 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: An Introduction and noise question
>
>
> Hello folks, first an intro. It'been a while since I've had my
> fingers in a
> VW. What I do remember clearly is all the nonfacts I received
> from local VW
> "pro's" so I'm looking forward to everyone's input on this list and
> hopefully I may be of assistence to someone as well. I've got a 80 westy,
> just purchased recently. The previous owner put a rebuild from cali in it
> but never really got it on the road. A year later I got a hold of
> it. Almost
> immediately I noticed a grinding type of noise once it warmed up. To me it
> sounded like the flywheel rubbing. I do have a cylinder running at 65 psi,
> all others are
> about 90 to 110 which is actually another question but I don't think it is
> related to the noise. I've got a tempature gauge and at first startup the
> engine runs beautifully
> at about 210. After about 20 minutes the noise starts and the temp slowly
> rises to a n overheat. The noise seems to only appear at idle or very low
> engine loads.
> Tonight I pulled the motor to inspect the flywheel but everything looked
> normal. I haven't checked the endplay yet. Could endplay cause this
> condition? Any Ideas?
> Any tricks to increasing compression in a single cylinder? THANKS IN
> ADVANCE..... Dennis in New Hampshire
>
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