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Old 04-21-2006, 15:22   #1 (permalink)
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Exclamation FORD 429 cam problems

I have a 1968 429 that keeps eating cams if any one has any ideas please let me know. I am on my 5th cam. I have even had a machine shop put the motor together.
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Old 04-21-2006, 15:49   #2 (permalink)
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Re: FORD 429 cam problems

whats it doing to the cam?
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Old 04-21-2006, 18:56   #3 (permalink)
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Re: FORD 429 cam problems

Maybe there is an oiling issue.

You don't by chance have some incredibly strong valve springs fitted.
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Old 04-21-2006, 20:25   #4 (permalink)
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Re: FORD 429 cam problems

Quote:
Originally Posted by garth04
whats it doing to the cam?
I lose at least two lobes on the cam, the first two times the cam moved forward in the block the last two times four difrent lobes have gone flate. this time it is the number 7 cylinder last time it was the number two cylinder.
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Old 04-21-2006, 20:27   #5 (permalink)
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Re: FORD 429 cam problems

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Originally Posted by Big Block Ford
Maybe there is an oiling issue.

You don't by chance have some incredibly strong valve springs fitted.
the machime shop worked the heads over and check my springs and replaced a few so I don't think I have a spring problem. I just thought I was an inept idiot who couldn't build a motor.(I almost feel better knowing it did the same thing after the machie shop built it)
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Old 04-21-2006, 20:29   #6 (permalink)
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Re: FORD 429 cam problems

Quote:
Originally Posted by garth04
whats it doing to the cam?
It goes flat every time a put anew one in. It takes les than 500 miles before they go flat. and its on difrent cylinders.
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Old 04-21-2006, 22:52   #7 (permalink)
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Re: FORD 429 cam problems

Quote:
Originally Posted by popestev
the first two times the cam moved forward in the block.
was the retaining plate behind the cam sprocket left loose or did it break to allow this?

Quote:
Originally Posted by popestev
four difrent lobes have gone flate.
Are you running the camshaft in?

Did you lift the tappet covers off to make sure the push rods are rotating when the engine is running?
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Old 04-21-2006, 23:06   #8 (permalink)
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Re: FORD 429 cam problems

I'd almost put money on a valve spring prob. Is there clearance so they are not coil binding? What cam are you using,solid /hydraulic? Do the lifters rotate freely in the block.? What oil are you using ? Cam endfloat???

I assume new lifters on each cam??
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Old 04-22-2006, 17:56   #9 (permalink)
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Re: FORD 429 cam problems

Do you run the new cams in , @ 2000rpm for 20-30 mins,,,then put some kms, on it with out reving too hard. And always let engine get to operating temp, and oil temp is up to operating temp too...you will chew lobs off if you are thrashing it cold.
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Old 04-23-2006, 11:35   #10 (permalink)
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Re: FORD 429 cam problems

Quote:
Originally Posted by garth04
was the retaining plate behind the cam sprocket left loose or did it break to allow this?



Are you running the camshaft in?

Did you lift the tappet covers off to make sure the push rods are rotating when the engine is running?
The retaining colar is fine it is not broke and yes the pushrods spin while the motor is runing, and yes I do a cam break in.
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