Re: [Chevelle-list] Ticking from #4 Cylinder :-( (addidional info)

[Dale]

If removing the boot (hence no spark) makes the ticking disappear, I’d check the plug boot for arcing.  A lose rocker arm would make noise whether the cylinder is firing or not – it’s still going up and down.  Try switching #2 and #4 (or #4 and #6) wires at both the distributor and plug and see if the sound moves with it.  Don’t just swap the plug ends as it’ll misfire badly and defeat the test purposes.   Everyone has their own preference for adjusting hydraulic valves so you may get different opinions but here’s my method.  With the engine running at operating temp and clips in place back the nut off until you hear a noticeable clatter.  Tighten until the clatter goes away.  Let it stabilize a few seconds then one-quarter additional tightening turn.  Most books will say a half to full turn but one-quarter works for me.  Listen for any noise after buttoning it back up.  Rocker nuts have known to lose their ability to hold a set and may tend to back off again.  Sometimes switching just the nut with another rocker will solve it and sometimes a new nut is required.  If that happens and if studs are replaceable, a new stud and nut.   Dale McIntosh 1967 Chevelle Reference CD! http://www.chevellecd.com ACES #1709/TC Gold #92 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Nasta Sent: Monday, July 31, 2006 5:12 PM To: The Chevelle Mailing List Subject: Re: [Chevelle-list] Ticking from #4 Cylinder :-( (addidional info)   To adjust the valves you will either need a set of oil deflector clips or you can take an old valve cover and cut open the top above the adjuster nuts. Otherwise oil will fly all over the place and make a huge mess out of your engine compartment.   IIRC you tighten the nut over the rocker arm until the engine starts to run a little bit rough and then back it off 1/4 turn. Somebody correct me if I'm wrong. It’s been a couple of years since I adjusted valves.   HTH, John Nasta       -----Original Message----- From: Pelle Andersson [mailto:[EMAIL PROTECTED] Sent: Monday, July 31, 2006 5:58 PM To: The Chevelle Mailing List Subject: Re: [Chevelle-list] Ticking from #4 Cylinder :-( (addidional info)   It follows the RPM. If i remove the spark plug boot from that cylinder the ticking disappears!   Would you give the same diagnose with the additional info above?   How do I adjust ther rocker arm?   Pelle ----- Original Message ----- From: Dale   To: 'The Chevelle Mailing List' Sent: Monday, July 31, 2006 5:53 PM Subject: Re: [Chevelle-list] Ticking from #4 Cylinder :-(   If it’s not an exhaust leak and you can’t adjust the noise out of the rocker arm, could be a flat lobe on the camshaft, had it happen to me. Lifter would never adjust and turned out to be a flat lobe.   Dale McIntosh From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Shawn Price Sent: Monday, July 31, 2006 7:19 AM To: The Chevelle Mailing List Subject: Re: [Chevelle-list] Ticking from #4 Cylinder :-(   Usually a sound like that is an exhaust leak from the header, a lifter not pumping up or a rocker arm that needs adjustment.   --   Shawn   On Jul 31, 2006, at 7:58 AM, Pelle Andersson wrote:   What is the most likely cause? The sound is quite light & sounds somewhat like a clock tick! Pelle