[AT] Old test for a bad valve?--followup

[John Wilkens]

Thanks for the great response!  My question is answered.  Forgot to say I 
can't do a compression test since its a diesel engine and don't have that 
kind of equipment--especially for a Perkins (MF 175).  Looks like I have a 
bad exhaust valve on cylinder 3 or 4 since thats the port that is "poping" 
the paper.  Hope a valve job is all I need! ....which I can handle myself 
with my semi-antique valve seat grinder and valve re-facer.  Then, if the 
injectors are OK I'll be back in business.   I found a shop in 
Milton-Freewater that will bench test them at no charge.   Nice to find 
people like that!     John



At 08:11 AM 09/01/2004, you wrote:
>John:
>
>I remember that test from many years ago. The concept is to use a piece of
>fairly stiff paper as a flapper over the end of the exhaust pipe to check to
>see if the exhaust valves leak during the intake cycle of the engine. The
>paper flap should not be sucked closed on the exhaust pipe at any time.
>
>Dean A. Van Peursem
>Snohomish, WA 98290
>
>What people can dream, people can do! George W. Bush
>
>www.deerelegacy.com
>
>http://members.cox.net/classicweb/email.htm
>
>
>
>
>-----Original Message-----
>From: at-bounces at lists.antique-tractor.com
>[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of John Wilkens
>Sent: Wednesday, September 01, 2004 8:03 AM
>To: at at lists.antique-tractor.com
>Subject: [AT] Old test for a bad valve?
>
>I sorta remember that there is a simple test for a bad engine
>valve--something like holding a piece of paper against the end of a tail
>pipe (exhaust stack for a tractor).  Anyone remember the details?     John
>
>                     In the wide-open spaces of NE Oregon
>
>
>
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                    In the wide-open spaces of NE Oregon