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Old 05-16-2012, 06:46 PM
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Cam break in

Hey guys quick question. During cam break in I had a few things to fix during the break in period. So my question is, does each 5 minutes of run time go toward the overall 20 min needed to break in the cam or do you need 20 min straight.

John

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Old 05-16-2012, 07:32 PM
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20 minutes straight is better, thats why we say make sure everything is right. But 20 minutes total works too. Change oil and filter while oil is hot. Stay with an oil with zinc if you have a flat tappet cam.
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Old 05-16-2012, 07:47 PM
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Quote:
Originally Posted by Richiehd
20 minutes straight is better, thats why we say make sure everything is right. But 20 minutes total works too. Change oil and filter while oil is hot. Stay with an oil with zinc if you have a flat tappet cam.
Thank you for the quick answer. Do you do a oil change before seating the rings
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Old 05-16-2012, 07:52 PM
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Yes, after that 20 minutes breakin, change that oil and filter. Its full of grit from machining, assembly, ring and cam breakin.
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Old 05-16-2012, 07:55 PM
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Great thanks for the info.

John
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Old 05-16-2012, 08:47 PM
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Being the amateur I am, I always find myself fixing something with a cam break in lol. In the end I haven't had any mechanical issues that stemmed from it....yet
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Old 05-17-2012, 05:07 AM
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My problem turned out to be my fast efi was too lean making the headers glow red.
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Old 05-17-2012, 06:28 PM
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Quote:
Originally Posted by johntm
My problem turned out to be my fast efi was too lean making the headers glow red.
OUCH! Ihope you dont have the valves too tight.
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Old 05-17-2012, 06:35 PM
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no, once I adjusted the EFI settings she ran no problems at all never heating up at all.
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Old 05-18-2012, 09:53 AM
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I have always heard and will probably abide by this but I always like to break an engine in on a known good carb. Intake gaskets are cheap enough.
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Old 05-18-2012, 10:08 AM
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I try not to idle the engine at all during break in, but I have stopped them several times if needed. Best is 20 min. uninterrupted, but that's not possible if things go wrong. I haven't had issues by stopping either.
I change oil after the break in and a test/tune drive, then again at around 500 miles.
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Old 05-18-2012, 05:01 PM
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Quote:
Originally Posted by 1971BB427
I try not to idle the engine at all during break in, but I have stopped them several times if needed. Best is 20 min. uninterrupted, but that's not possible if things go wrong. I haven't had issues by stopping either.
I change oil after the break in and a test/tune drive, then again at around 500 miles.

thank you for the info.
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Old 05-19-2012, 03:55 AM
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Quote:
Originally Posted by johntm
thank you for the info.
I would add more break in lubricant to the motor oil after the first oil and filter change, same as when the cam was first broken in. Using ZDDPlus, etc. or oil that contains sufficient additives for flat tappet cam break in will do fine. You don't need too much additives, either- just the recommended amounts. This may not be absolutely necessary but I consider it cheap insurance.
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Old 05-19-2012, 05:06 AM
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Quote:
Originally Posted by cobalt327
I would add more break in lubricant to the motor oil after the first oil and filter change, same as when the cam was first broken in. Using ZDDPlus, etc. or oil that contains sufficient additives for flat tappet cam break in will do fine. You don't need too much additives, either- just the recommended amounts. This may not be absolutely necessary but I consider it cheap insurance.
I have no problem doing that. What is your thought, it still needs more break in?

John
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Old 05-19-2012, 08:20 PM
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Quote:
Originally Posted by johntm
I have no problem doing that. What is your thought, it still needs more break in?

John
If you have a total run time of at least 20 minutes, you're prolly OK. If you are the worrying type, give it another ten minutes =/> 2000 rpm w/o idling and call it good.
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