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Valve clearances is not as much of a problem with Volvos as with most other cars. I would check all kinds of things before I start adjusting valves.
Bad valve adjustment would usually just cause tapping due to too much loose space between valve and cam parts. I can't see how it would affect fuel economy.
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DAMHIK: Don't Ask Me How I Know - - - Sven: '89 245, IPD sways, electric rad. fan conversion, e-codes, 28+ mpg - auto tranny. 500 mi/week commute. '89 245 #2 (wifemobile). '90 244 (spare, runs).
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