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Old 09-24-2019, 10:31 PM   #11
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[QUOTE=Focus3cyl;11378075]

Why would anyone run an oil pump with a rubber belt?

Also, found out that the oil pump belt is a maintenance item. Every 150K Mi. Everyone beware!!

Have a look at a dry sump setup, GM runs them in their LS3,LS7 & LS9's in the Z06, ZR1 & Grand sport Vette's, have a look at the Porsche motors as well as all the NASCAR motors......
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Old 09-24-2019, 10:38 PM   #12
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Thanks Felix, can you please enlighten me as to why you think this problem is happening then? I believe it's the vacuum pump, but would love to hear your thoughts...
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Old 09-24-2019, 10:46 PM   #13
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blamed it on the belt breaking... im curious to see how many more focus' have this issue with the belt/oil pump/vac pump.... well before the "150k" maintenance schedule... seems like a significant design flaw. they also want to charge around 7k to fix it too... so...
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Old 09-24-2019, 10:59 PM   #14
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My local mechanic told me that the vacuum pump is not lubricated by the oil pump. Therefore, the vacuum pump should not have been damaged by the oil pump failing.

I do not claim to know everything, but if that is the case, all evidence points toward vacuum pump failing.

I just want to know if others are having the same issue, and hoping that people can shine the light on a manufacturer error.
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Old 09-24-2019, 11:04 PM   #15
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like i say im curious as to how often this fails as 2017's get close to 70-100k miles... which is obviously no where close to the 150k ford says
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Old 09-25-2019, 12:31 AM   #16
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Having worked on vacuum pumps on a number of things I'm gonna say that they just tend to break or lock up similar to the old smog pumps used for pollution control; it's in the nature of the beast. Pumping air up or down in pressure, the environment is hot and dry and sometimes dirty yet pump vanes have to seal to make the pumping work. They at some point lose enough material to back way off in efficiency, or they simply break off pieces of vane or lock up bearings when they get tired of it. Both the latter bring the part down instantly with little warning. If anyone has ever pulled apart an old smog pump you'll know what I'm talking about. Vacuum pumps are often the same way inside, dry dirt ingested wears them out.
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