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Showing results for tags 'lash'.
Found 2 results
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I finally got the chance to take off the valve cover and check the valve lash clearances and I noticed a strange consistency with my measurements. I have measured every exhaust valve clearance to be exactly .009mm and every intake valve clearance was between .004-.006mm except for one. The one valve was too tight for the smallest feeler gauge which was .004. To measure, I used a feeler gauge to feel for the highest gauge where it could slide between the cam and the lash pad while the lobes were facing straight up. This was also done with a cold engine. Now, I know the stock clearances are .008mm and .010mm when cold, but my engine has been modified. I am unaware of the exact specs, but my camshaft (E30 Japan) says "Americam 060 1" on the end of it and the PO stated it had been bored/ported at some point. Regardless of the modifications, the clearances should be much higher than .004mm-.006mm on the intake valves, correct? The only reason my awareness has been raised is the consistency of my measurements. Could there be a reason the PO or a previous tuner to have set the intake clearances that low? Or were they likely properly set at one point, but over time have all evenly deteriorated to their current state? Edit: Car is a 1973 240z with an L24 and E88 head
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Apparently my engine has a bit hotter of a cam, and there's a little bit of valve ticking, but I just adjusted the valves and the sound prevails even when at factory recommendation. Would a hotter cam alter the required amount of valve clearance? If so, is there a trial and error method of adjusting the valves until the ticking is gone, and therefore a proper seat is found? Or am I just doing the adjustment wrong?
