Belt tensioner
01-28-2011, 07:48 PM
#2
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No... because that's a horrible idea on a car with variable valve timing which (I'm pretty sure) requires variability of belt tension, not to mention, most morons would screw up the tension and destroy their engines when the valves impacted the pistons.
And it's not hard to change the timing belt... you're doing it wrong if you think otherwise.
And it's not hard to change the timing belt... you're doing it wrong if you think otherwise.
01-28-2011, 08:41 PM
#3
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How would vvt require a variable tensioner? I don't see how it would work, as there are a pre determined number of teethe between the pulleys. I don't see where it would put or take the extra tension from? You are correct about people messing up their engines, but as long as the deflection is measured and to spec I can't see how it could hurt, unless it goes unchecked and stretches then piston to valve contact...
01-28-2011, 08:57 PM
#4
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Nevermind, you're right about the belt tension not adjusting (I forgot that the VTC springs prevent the transfer of the altered cam angle to the cam sprocket).
But your proposal is still absurd because the belt itself stretches over time, so adjusting it manually for a new belt would require readjustment several times before it was at its proper final tension. The automatic tensioner keeps it at the proper tension for its entire lifespan.
Whenever you think you have a better idea for the way something mechanical about the VG30DE[TT] works, just remember - you're not smarter than Nissan engineers. They got the VG30DE[TT]'s design right the first time.
But your proposal is still absurd because the belt itself stretches over time, so adjusting it manually for a new belt would require readjustment several times before it was at its proper final tension. The automatic tensioner keeps it at the proper tension for its entire lifespan.
Whenever you think you have a better idea for the way something mechanical about the VG30DE[TT] works, just remember - you're not smarter than Nissan engineers. They got the VG30DE[TT]'s design right the first time.
Last edited by ZLover4Life; 01-28-2011 at 09:02 PM.
01-29-2011, 09:02 PM
#6
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Location: ElDorado Springs, MO
Posts: 94
Also when the heads warm up and expand it tightens the belt and the auto tensioner takes care of this. That is why when adjusting the belt you leave a certain amount of space between the tensioner arm and the body. I think it was Ash that posted about this. According to him you could watch the gap on the tensioner close as the engine warmed.
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