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Alloy Timing Gear Noise

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GTV6
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2014/02/18 23:07:55 (permalink)
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Alloy Timing Gear Noise

Do these gears in a V6 eventually get a bit quieter?  I'm turning heads at the moment but for all the wrong reasons. 
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    gtv6capri
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    Re: Alloy Timing Gear Noise 2014/02/19 00:35:36 (permalink)
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    Sound like a blower initially, but do bed in and become bearable.  I used the Morey Engine Oil Additive to dull the noise.  Take out your fuel pump and you can squirt it onto the teeth directly

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    Re: Alloy Timing Gear Noise 2014/02/19 02:15:48 (permalink)
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    Thanks.  Yeah it sounds like a blower and gets louder as the oil gets hotter.  I have steel gears in a 202 that eventually quietend down but was worried that alloy might not.  Time for a long run I guess (and maybe some insulation under the bonnet).  Other than that its awesome driving around with a new engine.  It's been too long - I had forgotten how nimble these cars can be.
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    gtv6capri
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    Re: Alloy Timing Gear Noise 2014/02/19 19:07:41 (permalink)
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    Try the Moreys its thick like honey and sticks like poo to the doona, it stays attached to the teeth.  Stick a bit in your oil too helps dull the lifter noise

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    ronsmallford
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    Re: Alloy Timing Gear Noise 2014/02/19 20:03:21 (permalink)
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    I have the alloy timing gear with the steel crank gear set purchased from JR. Its done a few thousand kilometers now and does seem to be a bit quieter than at the start. Its always going to be noisy in comparison to the original fibre/ nylon timing gear fitted as original. Is it needed at all? Ive heard of people racing with the nylon gear it just needs changing for new at a certain interval. Much like a timing belt on a modern engine.

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    Re: Alloy Timing Gear Noise 2014/02/19 23:07:00 (permalink)
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    ronsmallford
    Ive heard of people racing with the nylon gear it just needs changing for new at a certain interval. Much like a timing belt on a modern engine.

    I kept my nylon one just in case.
     
    Are they still available new?
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    Johnscapris
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    Re: Alloy Timing Gear Noise 2014/02/20 13:21:54 (permalink)
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    The noise is due to unmatched tooth profiles, excess backlash and or valve train harmonics.  Some aluminium and steel cam gears are installed with the original crank gear.  These combos are noisy.  A set of matched gears , ie crank and cam gears have little noise.  These are machined to provide correct tooth contact areas.  The Ford nylon tooth cam gears are the way to go.  No longer available, but a good used one will not fail.  Generally something else fails first which then causes the cam gear to disintegrate.  Open valve spring pressure dictates what type of cam gear is required.
     
    John
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    v4capmad
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    Re: Alloy Timing Gear Noise 2014/02/20 23:01:13 (permalink)
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    There are 2 types of nylon cam gears, they were changed on the d port motor, the later ones are better as they a metal all the way to the last about 20mm, which is nylon. The earlier ones are only metal about 30mm from the cam. I have see many early ones that have started to stress crack from the cam, tiny cranks that can be hard to see.which is said to allow the gear to wobble untill it fails. Jons is correct that all the gear that is connected to the cam, as in a wild cam with big lift and stronger valve springs can cause them to fail alot quicker. NOS ones pop up on ebay from time to time. You can buy match sets of crank and cam gears, but they can be hard to find. Cheers O

     
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    Re: Alloy Timing Gear Noise 2014/09/13 23:47:19 (permalink)
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    More miles done and still too loud so I put the original gear back.  I emptied the top radiator tank with a syringe and the just twisted it back to get the puller onto the crank pulley.  The gasket ripped a bit but I patched in with permatex and no leaks.  Hope the attached picture help someone later that may want to change the timing gear with  the engine still in the car.

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