oil pump gasket, yeah or nay

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Rapid Robert

Rapid Robert

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I bought a std vol pump from a member & he included the gasket. should I use it or toss it? I do lightly drawfile to get the mating surfaces flat. thank you for your time. RR
 
Six of one, half dozen of the other.
Personally, I've never pulled apart one that had a gasket, so I don't use them going back together. With a high pressure pump it might be a good idea... But I don't think you're wrong either way. Considering the current state of quality control on machining of replacement parts, it's probably not a bad idea.
How's that for a wishy-washy answer? :)
 
If a gasket is included, I say use it.
 
Do you want to draw air or oil into the pump? There is a reason the pickup is at the bottom of the pan.

Use a gasket.
 
Professor Fate said:
Six of one, half dozen of the other.
Personally, I've never pulled apart one that had a gasket, so I don't use them going back together. With a high pressure pump it might be a good idea... But I don't think you're wrong either way. Considering the current state of quality control on machining of replacement parts, it's probably not a bad idea.
How's that for a wishy-washy answer? :)
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That gasket is so thin I don't think it would help with any manufacturing irregularities.
 
Especially with a aftermarket or different-than-the-factory oil pump, use the gasket. I always use Indian Head Shellac on both sides the gasket (very thin coat)
 
Good to see you are paying attention! No sense have a leak there. Gasket seems good.
 
Do it. if it makes you feel good.
* true liberal!
I don’t think it makes any difference. Both surfaces are flat, torque it down and go.
 
6pak said:
Do it. if it makes you feel good.
* true liberal!
I don’t think it makes any difference. Both surfaces are flat, torque it down and go.
Click to expand...


Yeah, actually it does. A Melling engineer said in a webinar that an oil pump needs a gasket. He ought to know and he’s not guessing like some people do.
 
Rat Bastid said:
Yeah, actually it does. A Melling engineer said in a webinar that an oil pump needs a gasket. He ought to know and he’s not guessing like some people do.
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I'm not arguing the point, because it is valid. But Chrysler engineers didn't think it was necessary, and that's not a place where "cost cutting" would come into play. Like I said earlier, probably with an HP/HV pump is where it may become more critical.
 
Professor Fate said:
I'm not arguing the point, because it is valid. But Chrysler engineers didn't think it was necessary, and that's not a place where "cost cutting" would come into play. Like I said earlier, probably with an HP/HV pump is where it may become more critical.
Click to expand...


I don’t know Chrysler protocol for what got a gasket and what didn’t, but every engine I’ve pulled apart that I could verify was a virgin had a gasket. And to add to that wacky-ness, I never took apart a virgin that had soft plugs in the oil galleries.

I wish there was an explanation but I damn sure don’t have one.
 
Coat the #5 main cap with Diekem and put the pump on finger tight and tap it sideways with a ball peign hammer. It will show if the mating surfaces are good or not.
 
Often a surface will suck air before it will leak a liquid...I have had that issue on oil fittings.
 
OKI will use that paper thin gasket with maybe some permatex "high tack" thin spray on & first drawfile it lightly, thanks guys. RR
 
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