Date: Thu, 23 Sep 1999 11:31:15 +0300 From: "Heppu" <Usernopsam.com> Subject: Re: Noisy top end from cold
paulnopsamternet wrote in message <7s6bms$mmu$1nopsamonium.btinternet.com>... >Hello >I just recently bought a 1990 4door 900i 16v with 160,000 miles on the >clock, overall I am realy pleased with the car, the only thing that slightly >concerns me is that on starting the engine from cold there is a sort of >whirring/tapping noise that sounds as if it is coming from the timing chain, >(the engine sounds realy sweet when up to operating temp.) is this normal?If >not any ideas on what I should check. >all ideas/suggestions much appreciated > My 900i16 -89 240 000km has the same sympthom. When starting cold the chain ratlles and the noise slowly disappears when engine is getting warmer. At normal temperature there is no noise. I've changed hydraulic tappets, no help. One morning the noise did not come at all and it stayed away for half a year. Nowadays it has developed again the same noise but not so loud yet. I'm pretty sure that the chain tensioner don't push hard enough the chain follower and chain is slighly loose when cold. And when tensioner goes one step further the noise disappears. I have not yet tried with a new tensioner. I don't know why temperature changes the noise. I would imagine that the chain is more loose when hot. Or does the cylinder block expand slighly when hot??? Seppo Metsala semenopsambaud.fi_no_spam
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