Originally Posted by 67MercCat
Hey I'm working on my buddy's Ford 289 and it makes a horrible clanking noise at idle. Once it gets up to about 2000 rpm it goes away but it sound like s**t at idle. This condition does not change when it warms up either.
Is it possible that the valve is hitting the piston or do you guys think it's a loose rocker arm that needs to be adjusted? Valve lash issue maybe?
Yes it could be either one IMHO. What heads are on it ? better yet what all has been done to the engine what type work are you doing on it ?