I posted a week ago about noisy chains after a complete rebuild and installing the oil fed tensioners in my 77 engine. I have pulled them and they do not have air in them and they seem to be OK.
I read on one of the posts that the chamber alongside the piston is a pressure accumulator. The post stated that the nipple or port on the top was the pressure relief for the accumulator and that it was supposed to relieve pressure at 14 PSI.
I made a test setup ( see photo) to test the relief pressure thinking that if they relieved at a lower pressure this could be the answer to my problem and others who say they had 2 or 3 bad ones in a row.
First, my experiment shows that the tensioners will purge air through the relief valve and also through the piston as it is just a close fit with no O ring and air can get out from around the piston. Since it is a close fit it is probable still a good idea to bench plead the piston.
Second, One of my tensioners (R) one relieved pressure at 10PSI the left one relieved pressure at 6 PSI.
Does any one know what the relief pressure should be and if there is a rebuild kit for the pressure relief spring?
