Honda D16 timing belt not tracking straight Help!
12-14-2008, 11:22 AM
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Honda D16 timing belt not tracking straight Help!
Ive re-tensioned the new belt once and it still rides off the crank/cam and WP and tensioner about 3/16th of an inch with the covers off its real obvious . This is a fresh build not sure what to do but ask here if anyones ver seen this crap before.
Thanks for any advice in advance .
Thanks for any advice in advance .
12-14-2008, 01:34 PM
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Re: Honda D16 timing belt not tracking straight Help!
How long does it take to mis-align itself like that? Is it almost instantaneous once you start the engine or does it take a little while?
Is it an OEM belt?
Did you replace the tensioner and the water pump? It's possible that the tensioner bracket may be bent or the tensioner pulley may be loose, which could be creating just enough misalignment for the belt to start walking.. I'm not sure what engine we're talking about here, so if you have additional idlers, etc., they could be a problem also. usually what happens is that if the bearing has too much play in it, it will cause the pulley to tilt and make the belt walk off; the same thing can happen with a frozen tensioner bearing because of belt drag.
Same thing with a overly worn water pump bearing, although by that point everything is usually loose enough that the seals will wear prematurely so you might see the pump leak.
Other than a bad tensioner or a poor quality timing belt, I can't think of anything else that would make it walk like that unless there was something really wrong with one of the other pulleys or there was a spacing problem, like the wrong aftermarket cam gears for that engine, etc.
It could be something as simple as having the belt too tight, which can flex the spokes of the cam gears or flex the water pump housing such that the pulleys will tilt (same concept as a loose tensioner bearing but for different reasons).
Basically your problem shouldn't be happening if everything is in good working order and adjusted correctly, so take the belt off and take a good hard look at everything to see if it's too loose, too tight, etc.
Is it an OEM belt?
Did you replace the tensioner and the water pump? It's possible that the tensioner bracket may be bent or the tensioner pulley may be loose, which could be creating just enough misalignment for the belt to start walking.. I'm not sure what engine we're talking about here, so if you have additional idlers, etc., they could be a problem also. usually what happens is that if the bearing has too much play in it, it will cause the pulley to tilt and make the belt walk off; the same thing can happen with a frozen tensioner bearing because of belt drag.
Same thing with a overly worn water pump bearing, although by that point everything is usually loose enough that the seals will wear prematurely so you might see the pump leak.
Other than a bad tensioner or a poor quality timing belt, I can't think of anything else that would make it walk like that unless there was something really wrong with one of the other pulleys or there was a spacing problem, like the wrong aftermarket cam gears for that engine, etc.
It could be something as simple as having the belt too tight, which can flex the spokes of the cam gears or flex the water pump housing such that the pulleys will tilt (same concept as a loose tensioner bearing but for different reasons).
Basically your problem shouldn't be happening if everything is in good working order and adjusted correctly, so take the belt off and take a good hard look at everything to see if it's too loose, too tight, etc.
Last edited by Fabrik8; 12-14-2008 at 01:48 PM.
12-14-2008, 03:11 PM
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Re: Honda D16 timing belt not tracking straight Help!
did you put the washer behind the crank pulley? the timing belt goes on the oil pump pulley first, then the washer then the lower timing belt cover, then the crank pulley?
i knew someone who forgot to put this washer back on, and the timing belt rubbed in his valvecover and timing belt covers. we put the washer back on and had 0 problems after that!!
i knew someone who forgot to put this washer back on, and the timing belt rubbed in his valvecover and timing belt covers. we put the washer back on and had 0 problems after that!!
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