From Rennlist's 928 FAQ this is what they say;
"The 16 valve engines pre -1985 are non interference engines and will not damage the engine if the belt breaks. I have never seen one really break, but the teeth do get chewed up causing the belt to slip accomplishing the same end result. The 1985 and up engines were 32 Valve engines and are interference engines and will bend the valves if a timing belt slips of breaks."
Quote:
Originally posted by mattdavis11
Maybe some one can step in here. A family friend, and Porsche mech, took me for a ride in his 84 928 last weekend. He told me the same about the 944 being veritually 1/2 of his V8, but the design was not an interference engine, thus a grenaded cam belt(s) would not bend valves. Did the engine design change? He has one nice ride, but it's an auto.
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