Hastings LF107 about 6000 miles - hole!

[ZeeOSix]

Originally Posted By: oil_film_movies
GM (for about all their engines) is now saying the old bypass valve pressure settings are NOT high enough now for modern engines.


If they increase the bypass valve setting, they better also beef up their oil filters too. The bypass valve is what regulates the max delta-p across the media. Increase the bypass valve opening pressure and there could be even more pressure on the media, resulting in more chances of tearing.

 

[Linctex]

Originally Posted By: oil_film_movies


https://www.corvetteforum.com/forums/att...f-pf64-pf48.pdf explains the initial pressure wave from cold oil.


This is an incomplete/broken link

 

[CR94]

Originally Posted By: ZeeOSix
... Of course thicker oil and higher flow both increase delta-p on the media.
...
So does shrinking the media area (assuming the same media).

 

[njohnson]

There is another thread about a Baldwin filter having a issue. Looking at the websites, both Hastings and Baldwin filters are owned by Clarcor. Then, in Feb. 2017, Clarcor was bought the Parker Hannifin Company.

http://www.baldwinfilter.com/resourceslinksofinterest.html

http://www.hastingsfilter.com/abouthastingsclarcor.html

http://www.purolator-efp.com/About-Us/A-Parker-Hannifin-Company

https://www.parker.com/portal/site/PARKER/menuitem.4a7ba99b3c73ae7cc39acea5427ad1ca/?vgnextoid=d92e6a03af66a510VgnVCM100000e6651dacRCRD&vgnextchannel=c36e4e8717f5a510VgnVCM100000e6651dacRCRD&vgnextfmt=EN&vgnextcat=Clarcor%2BProduct%2BBrands&relatorId=e47188a979bcf510VgnVCM100000e6651dac____&vgnextrefresh=1


Reminds me of when Mann+Hummel bought Purolator, then, quality control issues start popping up.

 

[oil_film_movies]

Originally Posted By: Linctex
Originally Posted By: oil_film_movies


https://www.corvetteforum.com/forums/att...f-pf64-pf48.pdf explains the initial pressure wave from cold oil.


This is an incomplete/broken link

https://www.corvetteforum.com/forums/att...f-pf64-pf48.pdf

 

[ZeeOSix]

The technical bulletin is saying they raised the filter's bypass valve pressure setting on the PF63 & PF64 because of the oil pump main gallery feedback control.

They also say:
"Note: Any aftermarket filter must also have an internal bypass valve opening pressure
specification, element integrity, filtration performance, media particle trap specification and burst
strength that is equivalent to the ACDelco PF64/PF63E filters."

Thing is, they don't say what those specs are on the ACDelco PF64/PF63E filters except for the bypass valve setting of 22 PSI.

 

[oil_film_movies]

Originally Posted By: ZeeOSix
The technical bulletin is saying they raised the filter's bypass valve pressure setting on the PF63 & PF64 because of the oil pump main gallery feedback control.
The total message from that memo is that the pressure wave (spike) at startup is longer lasting and possibly more severe with the new feedback control strategy compared to other older "normal" engines. (Actually I think other engine brands have that same control law, BMW for one...)

For other engines without this strategy, there is still a violent spike at startup, just not as long lasting and severe as on the newer GM engines. This is insight into bypass event physics. Thats the only reason I mentioned it. GM is worried about them and now strongly recommends 22 psi bypass pressure filters to handle it.


Originally Posted By: ZeeOSix
Thing is, they don't say what those specs are on the ACDelco PF64/PF63E filters except for the bypass valve setting of 22 PSI.

Filter manufacturers know those specs. And field experience over the last 5 years have shown that few burst or leak. Certainly if you buy a 22 psi bypass oil filter (Wix 57502 and Fram Racing Oil Filters HP18 & HP19) for your GM engine, you can bet the engineers know its durable at that high bypass pressure!

 

[Trav]

Originally Posted By: ZeeOSix
Originally Posted By: Trav
Originally Posted By: ZeeOSix
It's oil flow combined with the oil viscosity that puts stress on the media, not oil pressure seen inside the can or on the dash gauge. Looks like another case of wide pleat spacing.


Wouldn't that equate to more pressure on the media and wouldn't that be increased with cold oil?

Of course thicker oil and higher flow both increase delta-p on the media.

What I'm asaying is that the "oil pressure you see on the dash" has nothing to do with the delta-p across the media. If there was 150 PSI of oil pressure inside the can with no flow, then the delta-p across the media would be zero.

If an engine was very tight and restrictive to oil flow the oil pressure could be very high, but have a pretty low oil flow volume. That would also mean the flow through the full flow filter was relatively low and give a low delta-p.


Got it, thanks.