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Originally Posted by pdonnell
After looking at the engine mounts for a low level vibration. Higher level after car has been sitting a few days out in the cold. I am going to do my valve adjusment on this rolla. Since buying it new in '93 its never been done. So I figure I'll tune it up and adjust the valves. Ordered a valve adjustment tool today and will get a micrometer at home depot. I've done more complicated valve adjustments (removal of cam's) so its pretty straight forward.
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Since the motor mounts look good I figure a poorly tuned engine might be the cause of the vibration. Who knows. But it needs a tune up anyway as I got it smogged the other day and the hydrocarbons registered 92. (Calif limit is 93) And I wasn't getting any faults on the O2 sensor. So what the hey.
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Anyways has anyone done there own adjustment? How did the car run after the valves were adjusted.?
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Just curious.
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Whoa, you're running pretty rich! That can make it vibrate more than usual.
Anyways, for the valves. I doubt that they're that much out of spec to cause a vibration. All you need is some time and a feeler gauge to check the lash. The numbers will be on the VECI sticker. IIRC, Exhaust is 0.25-0.35mm (0.0010 -0.014 in.) and Intake is 0.20 - 0.30mm (0.008 - 0.012 in.). If the measurements are really outta wack, sometimes you can swap shims. Forget going to the dealer for shims...they're going to be around $10 each!
I haven't tried it yet, but I believe you can get them from a Yamaha dealer as some of their engines used shim overbucket designs. Plus, they've designed a lot of Toyota's engines (heads mainly).
How did you go about testing the O2 sensor to make sure it was working correctly?
-Tim