1998 Camry timing belt problem

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Old 28 Dec 2004, 08:43 pm   #1 (permalink)
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Default 1998 Camry timing belt problem

Just had timing belt replaced, along with new tensioners. As soon as I got
it back, I noticed a louder roar than usual. It sounds like it is in the
general area of the timing belt. I notice it more when accelerating.
Anyone have this problem before. Any suggestions to correct the problem
will be appreciated.

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Old 28 Dec 2004, 09:22 pm   #2 (permalink)
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Default Re: 1998 Camry timing belt problem

Let the shop that did it ride in it and fix it.
Could be too loose...was it done with
Toyota parts?
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Old 29 Dec 2004, 09:01 am   #3 (permalink)
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Default Re: 1998 Camry timing belt problem

My guess, as others have suggested, is that the belt needs to be
tensioned correctly.
You'll have to convince the shop to redo the work. Will be very similar
to doing everything again, but the parts are already installed and
already new - and yes, they really should be genuine Toyota parts.
Loosen the tensioner pulley, install a new spring, and apply
significant force by prying against the tensioner pulley with the
adjustment bolt loosened.
When I did this, I pulled upward on the tensioner pulley arm with a
larger "hook" tool from a hook and pick set - used both arms, pulled
smoothly but very firmly - enough to move the whole engine back
slightly - did this three times in succession to really apply a good
strong tension to the timing belt - enough to last for 60,000 miles.
Then release the tensioner pulley, - let the new spring hold the
tension, then tighten the adjustment bolt.
Point is, the tensioner pulley spring is not sufficient by itself to
tension the belt. Installing that way will leave the belt too loose and
it can vibrate against the cover - possibly the noise you're hearing.
If you pry against the tensioner and tighten, it will be too tight.
To get the "Goldilocks effect" - "just right" - pry against the belt
tensioner and then release, allowing the spring to maintain the correct
belt tension - and always use a new spring.
With a new belt, new tensioner and idler pulleys, new water pump, and
new timing cover gaskets, plus oil seals (cam, crank, and oil pump
O-ring and shaft seal) all should be like new in there - quiet, smooth
and powerful, because the new properly adjusted belt should bring the
ignition timing back to original factory spec. (the distributor runs
off the back of one cam - driven by the belt)

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