Timing is Everything
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So you would recomend not using the Genuine Ford part D0AZ 6256-A? I was trying to keep the truck all original, however if this part is prone to failure I would have to reconsider.
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From: Stanley, VA
This works fine for a while but eventually the nylon becomes brittle and the teeth break off allowing the timing chain to lose it's timing. This won't happen with a metal gear (either steel or cast iron).
Another thing that happens, when the teeth start breaking off they fall into the oil pan and get sucked up into the oil pump pick up. This will clog and you'll lose oil pressure. So when the gear fails, you not only have to replace the gear and chain, you have to drop the oil pan and clean out the pan and pick up.
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From: Big Sky Country
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I am a huge fan of NOS parts and keeping it original. However, in this case, I would definitely go aftermarket. The original cam gear is an aluminum hub with nylon teeth molded around it. This was done because it is quieter but mostly because it was cheaper to make.
This works fine for a while but eventually the nylon becomes brittle and the teeth break off allowing the timing chain to lose it's timing. This won't happen with a metal gear (either steel or cast iron).
Another thing that happens, when the teeth start breaking off they fall into the oil pan and get sucked up into the oil pump pick up. This will clog and you'll lose oil pressure. So when the gear fails, you not only have to replace the gear and chain, you have to drop the oil pan and clean out the pan and pick up.
This works fine for a while but eventually the nylon becomes brittle and the teeth break off allowing the timing chain to lose it's timing. This won't happen with a metal gear (either steel or cast iron).
Another thing that happens, when the teeth start breaking off they fall into the oil pan and get sucked up into the oil pump pick up. This will clog and you'll lose oil pressure. So when the gear fails, you not only have to replace the gear and chain, you have to drop the oil pan and clean out the pan and pick up.
Thread Starter
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New User
Joined: Aug 2014
Posts: 10
Likes: 0
I am a huge fan of NOS parts and keeping it original. However, in this case, I would definitely go aftermarket. The original cam gear is an aluminum hub with nylon teeth molded around it. This was done because it is quieter but mostly because it was cheaper to make.
This works fine for a while but eventually the nylon becomes brittle and the teeth break off allowing the timing chain to lose it's timing. This won't happen with a metal gear (either steel or cast iron).
Another thing that happens, when the teeth start breaking off they fall into the oil pan and get sucked up into the oil pump pick up. This will clog and you'll lose oil pressure. So when the gear fails, you not only have to replace the gear and chain, you have to drop the oil pan and clean out the pan and pick up.
This works fine for a while but eventually the nylon becomes brittle and the teeth break off allowing the timing chain to lose it's timing. This won't happen with a metal gear (either steel or cast iron).
Another thing that happens, when the teeth start breaking off they fall into the oil pan and get sucked up into the oil pump pick up. This will clog and you'll lose oil pressure. So when the gear fails, you not only have to replace the gear and chain, you have to drop the oil pan and clean out the pan and pick up.
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