dfc34072   
   From: Not_this_soon@dot.net   
      
   Fowie wrote:   
   > On Jun 3, 1:33 am, "Long Ranger"  wrote:   
   >> "Fowie"  wrote in message   
   >>   
   >> news:eb84415d-e6d5-4cb3-bb73-aa207e0bcef7@i76g2000hsf.googlegroups.com...   
   >>   
   >>   
   >>   
   >>> On Jun 1, 1:17 am, Jeff  wrote:   
   >>>> Fowie wrote:   
   >>>>> My 83 toyota has been running great aside from the occasional part   
   >>>>> here and there going bad.  I drove it from Los Alamos to Albequerque   
   >>>>> Friday and it ran great.  However once I got into town and below   
   >>>>> freeway speed I noticed some tapping.  The tapping only happens when I   
   >>>>> apply minor acceleration, i.e. when I very first shift into a gear or   
   >>>>> when I'm driving around town, 35 mph or so, and don't need to have the   
   >>>>> pedal to the floor.  At freeway speeds when I've gotta have the   
   >>>>> throttle all the way open just to keep up with traffic it doesn't tap,   
   >>>>> same with when I'm coasting, but when I just apply a little   
   >>>>> accelerator I get the tapping.  Suggestions on what I should check/do   
   >>>>> first?   
   >>>> The noise you describe could be timing chain slap. The plastic guides   
   >>>> are known to fail. They can be inspected with the valve cover removed.   
   >>> Thanks for the tips, I'll check it out today.  I lost my Haynes manual   
   >>> though.  What are spec valve clearances for an 83 toyota, 4wd, 4 cyl.   
   >>> 22R carbureted engine?   
   >> Without looking my memory is 8-11 thousandths, exhaust and intake   
   >> repectively. It is normally printed on that little picture of your vacuum   
   >> lines that is pasted on the underside of the hood.   
   >   
   > I removed the valve cover to check things out and realized my valve   
   > check gague had rusted in my toolbox.  I checked the timing chain   
   > guides though and they're doing great (good thing, since I replaced   
   > the entire chain 3 years ago).  Any other ideas?  I've never had valve   
   > tapping so I'm just assuming that's what it is, it only happens when I   
   > mentioned it does.  Even just idling it's hard to make the sound while   
   > revving the engine, it has to be put under a light load, like when you   
   > just barely push on the accelerator.  If I push hard on the   
   > accelerator the tapping goes away.  I've gotta make another 2 hour   
   > drive Friday and I'd rather not throw a rod or something in the middle   
   > of the New Mexico desert.   
      
   Could your valve cover be torqued down too much? Apparently these 22R's   
   can have rocker arm clearance issues.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)