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The mkiv Supra Owners Club

Consequence of fitting cambelt tensioner incorrectly?


Jake

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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

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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: :nyah:

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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" :p

 

I'm not going to fit a new cambelt. That would mean stripping the whole thing down again.

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