Jake Posted November 11, 2005 Share Posted November 11, 2005 In Tony's How to:- Valve Stem Seal Replacement thread he mentioned that you need to compress the tensioner and put something in it to hold the spigot down until the tesioner is refitted. Like this : http://img454.imageshack.us/img454/5887/cambelttensioner5ma.jpg Now, I don't remember doing that when I refitted mine after I changing my broken idler wheel bracket (even though Mig told me to, I may have forgotten). What does pinning the spigot achieve? Is it just to make reassembly easier? What would happen if I fitted it without pinning the spigot? The reason I'm asking is that my engine is making a weird whirring noise. It sounds a bit like a supercharger from one of the Mad Max movies. I'm thinking that maybe the cambelt is way too tight. Any thoughts? (other than not letting me near your car) Thanks Quote Link to comment Share on other sites More sharing options...
absz Posted November 11, 2005 Share Posted November 11, 2005 your cambelt is too tight. if you don't press the tensioner in and just bolt it back on. it will be at its maxium tension it will result in belt failure Quote Link to comment Share on other sites More sharing options...
Miguel Posted November 11, 2005 Share Posted November 11, 2005 The spigot maintains its tension by gently pushing against the idler wheel braket it won't over tension as it only has enough force to maintain the correct pressure but the belt and wheel doesn't have enough energy to push it back in either hence the constant corrent pressure is maintained. Now if you re fit it without doing the "rewind the the spigot" the shaft will travel to it's maximun extent, when off, and there will be far too much tension on the belt system. It won't reduce it's tension as the whole system is designed to keep the correct pressure and take up slack in the belt over it's full life. Now doing this will result in belt wine and possible breakages most comonly idle wheel braket failure. And yes i did tell you LOL next time ill write it in bigger font:no: Quote Link to comment Share on other sites More sharing options...
Jake Posted November 11, 2005 Author Share Posted November 11, 2005 Right I'll whip it off and refit it properly. Thanks guys. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 11, 2005 Share Posted November 11, 2005 I'd fit another new cam belt, the old one may have suffered structural damage to the cords (invisible) having been run so tight it whines. The tensioner MUST, absolutely MUST be fitted in the compressed state. I am surprised you got the tensioner bolts to start fitting it extended. Quote Link to comment Share on other sites More sharing options...
bedlam Posted November 11, 2005 Share Posted November 11, 2005 chris Thats what i was thinking how on earth it went back on fully extended, cause the bolts arent that long . Andy Quote Link to comment Share on other sites More sharing options...
Miguel Posted November 11, 2005 Share Posted November 11, 2005 Right I'll whip it off and refit it properly. Thanks guys. Here i just noticed ...you should know all this seeing as you have "guru" ranking:p Quote Link to comment Share on other sites More sharing options...
veilsideTT Posted November 11, 2005 Share Posted November 11, 2005 If money isnt an issue (which it isnt when it comes to doing a cambelt) Id put a new tensioner on aswell! Scott Quote Link to comment Share on other sites More sharing options...
Jake Posted November 11, 2005 Author Share Posted November 11, 2005 I am surprised you got the tensioner bolts to start fitting it extended. It was a struggle actually. I remember thinking "I don't fancy doing this too often" I'm not going to fit a new cambelt. That would mean stripping the whole thing down again. Quote Link to comment Share on other sites More sharing options...
Jake Posted November 11, 2005 Author Share Posted November 11, 2005 Id put a new tensioner on aswell! I can do that. I've got a spare one. Cheers Quote Link to comment Share on other sites More sharing options...
Jake Posted November 15, 2005 Author Share Posted November 15, 2005 I changed the tensioner today and refitted it correctly this time I'm happy to report that the nasty sound has gone away. Quote Link to comment Share on other sites More sharing options...
Pete Posted November 15, 2005 Share Posted November 15, 2005 It was a struggle actually. I remember thinking "I don't fancy doing this too often" I'm not going to fit a new cambelt. That would mean stripping the whole thing down again. Oh lordy - is this your other Supra you're trying to kill? Quote Link to comment Share on other sites More sharing options...
Jake Posted November 15, 2005 Author Share Posted November 15, 2005 Yeah I've ordered the parts to my valve stem seals so I'll be stripping it all down again soon enough. Quote Link to comment Share on other sites More sharing options...
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