Timing belt tension

[thfrider]

What is the best way to set the timing belt tension?  The manual states to apply like 4.4 lbs. to the long section and the belt should deflect .2 to .3 inches.  How are you guys setting this?

[Chrisj CMA]

Practically everyone I have talked to or read about that tried to go by the book ended up with belts too tight.  Myself included.  I think the best way is this:

After both belts are on and youre sure all the marks are up and in line then put it on the 1/2 mark and loosen the bolts holding the tensioners just enough that the tensioners can move (swing on the bolt that it pivots on) but not loose enough that they can wobble or bind and let that spring set the tensioner where it wants to.  

I usually press on the belt and watch the tensioner move make sure the spring is doing its job.  This will be very close to the right tension.  Do this on both belts and then compare the tension between the two.  

When you press on the LONG length of belt it should easily depress a little bit but quickly get taught, not spongy....if you already tried to measure the movement (by the book) and ended up with screaming belts, then you know what too tight feels like.  

I then decide which belt I like the tension better and make the other one the same (usually just means a very slight nudge of a tensioner as I re tighten it).

Hope that isint too confusing

[Hook#3287]

I usually remove the tensioner bolts, clean them, then install new lock tight.  Am I wasting my time?

[Chrisj CMA]

I usually remove the tensioner bolts, clean them, then install new lock tight.  Am I wasting my time?

no, not wasting time, because one of them can lead into the crank case oil and could leak if you dont seal it....ask how I know that one

[thfrider]

Thanks, so it sounds like this is not an exact science.  What are you calling the 1/2 mark?

[Chrisj CMA]

Thanks, so it sounds like this is not an exact science.  What are you calling the 1/2 mark?

timing marks 1/2...3/4...5/6