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Old 11-06-2019, 09:37 PM   #1 (permalink)
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Aluminum or silent timing gears

As I said in my past posts .... may as well change everything I can on the bottom end while the engine is out ... 1986 F-150 4x4 4.9 i6

So, I am going to put a new oil pump in ....

I may as well change the timing gears at the same time (this went on my last motor).

So do I use "silent" gears ( plastic with a metal center) or do I go with aluminum gears?

Just an old work / plow truck so noise does not matter.

Thanks .... Mike
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Old 11-06-2019, 10:16 PM   #2 (permalink)
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Factory for your 86 would have been aluminum crank, phenolic cam. They last installed the steel/steel gears 82 or 83 in pickup apps. Not sure what they are selling as silent gears.
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Old 11-06-2019, 10:31 PM   #3 (permalink)
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Rock Auto has lots of choices ...

Lots of choices on Rock Auto ...

All have either steel or cast iron crank gears ... the cam gears vary ...

Cheapest ... metal center with phenolic teeth

Complete cam gear phenolic

Complete gear aluminum

Most expensive ... steel / cast iron gear

I tried to read up on this. It "seems" people think steel (or aluminum) gears last longer but make more noise.

I am not sure if this is true so I wanted to check with you guys.

Thanks .... Mike
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Old 11-06-2019, 11:21 PM   #4 (permalink)
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Look up Sealed Power 2212764S.
Should be steel/steel.
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Old 11-07-2019, 05:01 AM   #5 (permalink)
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Get metal/metal (steel or aluminum) since it's all around superior and doesn't really make any more noise than the engine fan.
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Old 11-07-2019, 08:36 AM   #6 (permalink)
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So alum is ok?

Great ...

The aluminum one is only $5 more than the plastic one ... no brainer.

The steel one is over double ... that hurts a bit.

So it there a good reason to spend over double on the steel one or will the aluminum one be OK?

Thanks so very much again !!!!!!

Mike
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Old 11-08-2019, 12:59 AM   #7 (permalink)
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Originally Posted by xtal_01 View Post

So it there a good reason to spend over double on the steel one or will the aluminum one be OK?



Mike

I have no opinion on either material, they should both be fine in a stock build, but I'd look for a set that's adjustable. With that much of a price difference the steel may be an adjustable set while the alu is straight up. Those couple of degrees can wake up an engine.
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Old 11-08-2019, 04:59 AM   #8 (permalink)
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Originally Posted by Trick95 View Post
I have no opinion on either material, they should both be fine in a stock build, but I'd look for a set that's adjustable. With that much of a price difference the steel may be an adjustable set while the alu is straight up. Those couple of degrees can wake up an engine.
I wouldn't spend extra for adjustable since you can get an offset key for like $5. Either set should outlive the truck the engine is in.

Last edited by arse_sidewards; 11-08-2019 at 05:00 AM.
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Old 11-08-2019, 10:31 AM   #9 (permalink)
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Thanks!

I had never heard of an off set key ... makes sense.

I think the last time I saw and ajustable cam was way back in my college days when I rebuilt a 911 engine .. holes in the cam gear and a plate with another series.

Anyway ... not trying to push this old engine, just make it as reliable as I can without spending a lot of money.

Thanks so very much for the advice!

mike
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Old 11-08-2019, 02:14 PM   #10 (permalink)
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Comp Cams sells a timing gear set for the Ford 300, also Fordsix is a great forum all about these inline engines
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Old 11-08-2019, 02:23 PM   #11 (permalink)
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never heard of them!

Thanks again ... didn't know about that forum!
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