Miata Mailing List: October 1997, Message #151
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From: 	guerrero@eiws.esid.northgrum.com (Joe F. Guerrero)

Subject: Re: Timing belt change question

Date: 	Wed, 1 Oct 1997 14:32:13 +0000



> I was poking through PBC's site and I noticed in their "timing belt kit",

> it included a new tensioner spring. I've never replaced this spring in all

> the belts I've done and never noticed any problems (like jumping a tooth

> due to lack of tension.) In fact, I'm not even sure what the spring is used

> for since the tensioner is held down with a lock bolt.  The shop manual

> doesn't consider it a maintenance item either.

> 

> Anyone know what the deal is with replacing the tensioner spring?

> 

Hi Gary,



I replaced the tensioner spring when I did the timing belt.  It was

only a couple of dollars.  The Miata Enthusiast Manual says to 

replace the spring, so I did.  I figured it would be better to spend the 

extra dollars now, rather than re-do the timing belt if anything happened.



Like you said, the tensioner doesn't do much.  You loosen the tension

pulley "lock bolt" after the new timing belt is in place.  The tensioner

spring applies the proper tension and then you lock the bolt down.  The 

tensioner spring doesn't move after that, so I don't see how it

can really get fatigued.  Oh well...



Joe G

'92 Silver