Valve loose again???
 

I adjusted my valves (using the Back-Side method) to my 3.2 about 200 miles ago and made sure they were nice and tight and to spec. I recently started feeling the car shaking a bit when at idle, and also some excessive noise. I opened up the passenger side valve covers and starting taking the valve-gap measurements, and to my surprise, they were all loose:eek:!! WTH!!

Using both of the required Go No-Go gauges, I was able to slide both of them, one at a time with no resistance at all!! What is going on here??

Note- according to the PO, the engine had been "overhauled". So here is my question, when a engine has been "overhauled" or refreshed, would this cause
"general" items to loosen up? I did have one loose head-stud last time I adjusted the valves, so it makes me wonder??

Thanx,

Serge

Don't know......but adjust them again.
.0025 go .003 no go....... works for me.
Pelican Technical Article: 911 Valve Adjustment - The Backside Method

Did you adjust you valves with the engine stone cold?

And have your loose, subsequent measurements been taken with the engine stone cold?

I haven't measured my valves when warm, but others report that when warm the valves loosen. So that may be your issue.

Were they quiet after the first setting? If so, my thoughts are: perhaps the settings changed because the lock nuts were not tight enough or something is wearing in the valve train - cam lobe or rocker face. Rocker shafts moving could be an issue too. Good luck.

Thanx for the input - First, I am familiar with the process and yes, I adjusted the valves in the "Cold-Stone" state. It sounds better and they weren't too loud, but I wanted to just check them. I really don't think the Cam Lobes or Rockers have worn that much in 200-300 miles.

Any other thoughts??

Sergio