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timing retension at 1500 miles...

retensioned the belts today. i used auto tensioner only, just like the WSM says. then, i tensioned the balance shafts by feel. and i feel totally comfortable with it.
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Old 05-29-2007, 04:33 PM
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How did you tension them the first time you put them in?
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John
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Old 05-29-2007, 05:03 PM
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with the p9201. i'm not CRAZY!!!
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Old 05-29-2007, 05:05 PM
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lol... How much does that tool cost????
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John
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Old 05-29-2007, 05:06 PM
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I believe p9201 is over 700, + calibration bar, if you want awesome tools check out arnnworx tools.
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Old 05-29-2007, 05:09 PM
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good call Nynor... ive got to put this on my short list... just not in the mood to wrench lately, but i did my belts with vinman over the winter, its defiantly time to retension...
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Old 05-29-2007, 05:33 PM
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it was pretty much exactly at 1500 miles. the timing belt was getting a little sloppy, but the balance shaft belt was really bad. i'll look at it again in 1500 miles. it only takes me about an hour to do the whole thing, maybe a little bit longer.

the car does run better. has anyone else experienced this? my theory is that the loose timing belt causes the ignition timing to become a bit retarded.
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Old 05-29-2007, 05:39 PM
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I noticed this as well. My timing belt was at 1.5 using the P9201 and should be 2.7. It was feeling a little sluggish before I retensioned. Here I thought I was being retarded.

Speedy
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Old 05-29-2007, 05:58 PM
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did you notice some whining or slapping? i thought i heard a hint of this the other, day, i really gotta do this....
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Old 05-29-2007, 06:08 PM
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i didn't hear any slapping or whining. however, i did hear it before on my '83. the belts were ruined. luckily, THAT time, there was no damage, other than the belts.

if you hear slapping, it will usually be on start-up. then it will quiet down as the engine warms/expands. if this is happening, you will probably need to change the belts again. look at the timing belt cover for lots of dust.
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Old 05-29-2007, 06:22 PM
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I just had my belts done and the car whines like it has a supercharger now. Higher RPMs the more noise. It didn't make this moise before it got the new belts. Is there something wrong with them? Too tight? Too loose? Normal?
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Old 05-29-2007, 06:25 PM
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also, it is a pet theory of mine that loose belts will wear the rollers out quicker and vice-versa.
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Old 05-29-2007, 06:26 PM
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Quote:
Originally posted by Icey1174
I just had my belts done and the car whines like it has a supercharger now. Higher RPMs the more noise. It didn't make this moise before it got the new belts. Is there something wrong with them? Too tight? Too loose? Normal?
it has been my experience that if you hear a whine, the belts are either too tight, or the rollers are worn out. worn out rollers are a serious problem. this can be checked, to a certain extent, very easily. take out the timing belt idler and spin it by hand. if it spins easily or has any end play whatsoever, it is worn and you can bet that all the others are worn as well.
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Old 05-29-2007, 06:31 PM
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a new belt will whine for a couple hundred miles... then quiet down.
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Old 05-29-2007, 07:51 PM
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like i said, not in my experience, except when things are worn.
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Old 05-29-2007, 07:59 PM
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I noticed if the balance shaft belt is tensioned at the upper end of the specs it will whine. I try to shoot for the lower end of the specs. Also check you aux belt tension. If it is real tight it may whine as well.

Speedy

BTW no slap for me.
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1987 944S Purchased from Legion. Corvette LT-1 V-8 conversion with Mega Squirt II
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Old 05-29-2007, 08:08 PM
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Quote:
Originally posted by nynor
also, it is a pet theory of mine that loose belts will wear the rollers out quicker and vice-versa.
I was coming up on my 1,500 mile retention when a missed shift caused a balance shaft to jump a tooth.

BB.
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Old 06-03-2007, 07:02 AM
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well, i have to say, the balance shaft belt was *VERY* loose. i had at least an inch and a half deflection on that thing, before tightening it a bit.
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Old 06-03-2007, 10:46 AM
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I have the "tool" on it's way. Should be here Wednesday morning. My timing belt is tighter than the balance belt. Once it's here I'll check them both right away to make surre I can duplicate readings. I have never seen this type of tool before. After I check them I'll take them off and chek all the rollers and tensioners.

Any tips or tricks to using this tool?
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Old 06-03-2007, 10:51 AM
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yeah, forget the 'set pointer'. put the tool on the belt, compress the moveable arm, hold the the tool in place, read the dial.
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Old 06-03-2007, 10:57 AM
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