Subject: Push rod
Author: Ian Adkins
Date: Mar 11, 2004, 7:31 AM
Post ID: 1716273073
Hi Gary,
Road was bent at the top end. About a 1/4 of an inch from the bottom edge of
the cup.
I will pull the head this weekend. I am thinking what you are....valve stem
bent or broke. When I intalled the new rod the valve would acuate when the
engine was hand turned. I tried to fire the bike up and she would run on the
right cylinder but not the left. Seems to me that the intake valve has shut
down.
I'll let you know what I find out...Ian
| -----Original Message----- From: Gary Cheek [mailto:kg8-@comcast.net] Sent: Tuesday, March 09, 2004 2:10 PM To: Loopfram-@topica.com Subject: RE: How to identify a loopframe Ian tell me more about the pushrod . You may have already , but should at least check the valve and guide . Check the valve to make sure it is not bent . A quick - QUICK (approximate) check is to roll the valve on the edge of a table or chuck it up in a drill. Note that the head should show no sign of irregular running . Even then it is best to have it checked properly at a machine shop. The valve stem should be checked for the signs og running tight or siezing . A sticky guide can cause an overload to bend a p-rod. NOW for the most often overlooked mis diagnosed cause ; A blown head gasket . The gasket blows hot gasses into the pushrod and the reduced strength will cause the metal to yield and bend . This is most common with Aluminum alloy pushrods . Steel pushrods are not weakened as easily at higher temps and usually survive . Triumph twins are very susceptable and actually break in time when the gasket leaks . Ian Adkins wrote: |