Oil pump questions

Myasylum

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Just bought a new Melling M-63HV oil pump. I was reading how it should be cleaned and lubed with Vaseline? I have a new cam with break in oil. Will the Vaseline mess with the break in process?? I thought about just using break in lube instead of the Vaseline.
Any ideas?
Thanks!
 

zyzzyx

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Just stick it in a gallon can with two quarts of oil, (Anything cheap) and use a drill and a piece of allen wrench to
power the pump. It will clean everything out of the pump and pre-lube it so when you start the engine it will pick
up the oil through the pickup. Easy-Peasy!
 

Myasylum

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I opened it up and it was prefect inside clean as can be and lubed. I
saw a You tube video where the "new" pump was pretty nasty.
 

493 Mike

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I always open up, inspect, clean and lube (with motor oil) new pumps. I assume they were assembled by humans and we're not all perfect. Prelubing engines is mandatory in my shop!
Mike
 

Geoff 2

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Depends which engine. The SB has the pump immersed in oil, so it is not critical.
The BB is not immersed in oil & will require some sort of lubricant as an initial seal to draw oil from the pan. I think vaseline or light grease is better for this than oil.
 

beanhead

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The method of pre-packing the pump with petroleum jelly or a grease has been a source of debate forever....some swear by it, some swear at it. In truth like '493' said you should always open the pump for a pre-install cleanout and inspection,"just in case". Simply spinning the pump in oil a few times prior to install to get a film on the innards is all that's needed so it's not dry dry. It will then be fine to make a few revolutions later when priming the engine for first fire.

Grease in Oil Pumps??? New Tech Tip on Priming your Oil Pump - Melling
 

beanhead

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I opened it up and it was prefect inside clean as can be and lubed. I
saw a You tube video where the "new" pump was pretty nasty.
That's good news! I'm only batting about .500 on new pumps...only once did I find actual metallic debris that would have ended my day, but many times they were just filthy dirty. It only takes a few minutes to check...now you KNOW yours is good to go for service!
 

WileERobby

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Never stick it in dry. Always lube before putting it in. That way you'll be sure the surfaces slide easily as the pump starts pumping.
 
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