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Old 09-16-2012, 04:14 PM
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Engine break-in paranoia

I just fired up a motor for the first time last night. I was going to let it idle at 2500 rpm for a while to start the break in process. I pretty much immediately had to shut it down due to a fuel leak. I got that repaired and fired it up again earlier today but again, had to shut it down when i noticed a transmission cooler line leaking like mad.

Is this going to hurt the break-in process? It was oiling wonderfully, i had the passenger side valve cover off because I wanted to inspect valvetrain and make sure pushrods were spinning and all, so i didn't exactly notice the tranny line last night.

I could be being paranoid but I really don't want to mess anything up with this one. On a positive note, the thing fired up immediately and I havent had any other problems out of it. It ran VERY well for the 2-3 minutes it has run.

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Old 09-16-2012, 04:21 PM
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It won't hurt it any. I had to shut one down 4 times due to a plug wire issue
about 8 years ago.
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Old 09-16-2012, 06:18 PM
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I agree with DV that you should have no problems. Remember to vary the breakin RPM between 2000 and 2500 to allow for different oiling patterns on the camshaft.
Terry
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Old 09-16-2012, 06:58 PM
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If the engine has a flat tappet cam, are you using a break-in oil, break-in additive, or at least an oil with a high level of ZDDP?
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Old 09-17-2012, 04:35 PM
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of course, break-in oil and I used MPZ cam lube on the whole valve train.
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Old 09-17-2012, 05:05 PM
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It's best not to shut them down, or lower the rpm during cam breakin, but I've had to stop the breakin numerous times. I just keep track of time and make sure I get the breakin done fully, even with stoppages.
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