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turboram
 Post subject: broken chain
PostPosted: Sat Apr 25, 2009 6:08 am 
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Last night I was driving my truck and snap! the motor went silent. :cry: So does anyone have an idea what would cause the timing chain to break and all the teeth to shear off of the crank gear in 5000 mi?
Also can anyone tell me if this is an interfirence engine,my cam has .460 lift.I may try a used set to do a compression test today

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sandy in BC
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PostPosted: Sat Apr 25, 2009 6:18 am 
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Its not an interference motor.

Until you have a new chain you wont be able to do a compression check.

Sounds like the cam stopped turning and the crank kept goin'

What does the OPDG look like?

Any bent pushrods?

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terrylittlejohn
 Post subject:
PostPosted: Sat Apr 25, 2009 11:56 am 
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you better check the cam pin and crank keyway for damage :?
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Dart270
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PostPosted: Sun Apr 26, 2009 5:14 am 
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What type of chain?

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slantzilla
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PostPosted: Sun Apr 26, 2009 5:58 am 
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Oil pump failure. :shock:

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turboram
 Post subject:
PostPosted: Sun Apr 26, 2009 3:23 pm 
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Its a melling timing set. I put a used set on yesterday and the compression is good and it also pumps oil.but I will pull the distributor plug and check the gears.I'm just wandering what would cause the failure. Ill post picture soon

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terrylittlejohn
 Post subject:
PostPosted: Sun Apr 26, 2009 6:04 pm 
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have you drain the oil to see were all the metal from the gear is? if it`s in the sump the pan is going to have to be flushed out.
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turboram
 Post subject:
PostPosted: Mon Apr 27, 2009 5:17 am 
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every tooth was shorn off and was in the front of the pan fished them out with a magnet.The teeth show no wear

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dakight
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PostPosted: Mon Apr 27, 2009 5:21 am 
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It sheared the teeth from a steel cam gear? :shock: :shock:

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Joshie225
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PostPosted: Mon Apr 27, 2009 8:11 am 
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A friend's Cheby ate the timing set and hurt the damper when the crank broke. :shock:

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turboram
 Post subject: pictures
PostPosted: Mon Apr 27, 2009 1:16 pm 
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heres the carnage
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THOR
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PostPosted: Mon Apr 27, 2009 6:28 pm 
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Holy crap.... :shock:

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bigslant6fan
 Post subject: tc
PostPosted: Mon Apr 27, 2009 8:34 pm 
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I agree with Slantzilla,something else is wrong and caused the timing chain to fail.Either the oil pump or cam bearings are bad.

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