Bypass in filter and block……?
- Thread starter DHBWA
- Start date
No, not a bad thing.
The bypass valve in the block will probably open before the bypass valve in the filter. Seems most bypass valves in the block are not set very high. Any service manual info, etc that says what the built-in bypass valve is set to?
Should I Block Off My Oil Pump Bypass?
I’m confused. I’ve seen magazine stories that say you should plug off that oil filter bypass in a small block Chevy but I’ve also heard that you shouldn’t do that. …
www.onallcylinders.com
For a SBC, 15 - 18psi
Cant really find anything concrete for a LS block...
If you say my 2007 F350 6.0L & 2008 Volvo 3.2L is "Common" then I'd say so. They both have built in bypass.
According to someone on the Z06 boards I participated in, he measured the filter bypass valve in an LS6 and it started cracking open at 11-12 PSI.Should I Block Off My Oil Pump Bypass?
I’m confused. I’ve seen magazine stories that say you should plug off that oil filter bypass in a small block Chevy but I’ve also heard that you shouldn’t do that. …
For a SBC, 15 - 18psi
Cant really find anything concrete for a LS block...
From that article, it says:
"In the case of the small or big block Chevys, the designers built in a simple bypass valve with a small
spring behind it that is rated to open at roughly 17-18 pounds of force."
They say pounds of force, not PSI. Two different things, and you would have to know the acting area of the bypass valve to determine what PSI it opened at.
Yeah, I'm a little confused as he said 17-18 but links to Summit a couple of times for the valve itself and a comment there says the same as your Z06 finding...
He was saying it took 17lbs of pushing force which unless the surface area acting apon the valve is 1” it will different than the hydraulic pressure.
I noticed a little bit farther down in that article they say 17-18 PSI ... so not sure which statement is accurate.
I do know the guy who determined it on the LS6 measured both the force and the acting area of the valve, then calculated 11-12 PSI opening pressure.
No, in fact, redundancy could be a good thing if it's at all possible that the internal engine bypass could fail to open. You'll want the pressure rating of the bypass valve in the oil filter to be at least as high as the one in the engine.
ACDelco 25013759 bypass valve ... says here opens at 11 PSI.
sdparts.com
Genuine GM Parts 25013759 - Engine Oil Filter Bypass Valve
11psi oil passage bypass valve. See description below for full information on which bypass valves you should use!
sdparts.com
I have measured old gm engines from the 1980s and 90s they're around as low as 3psid to 7psid and the 7 is me being optimistic.
They're supposed to be like 10, 11, 12psid. Oh and they all probably leak at least a little.
They're supposed to be like 10, 11, 12psid. Oh and they all probably leak at least a little.
OVERKILL
$100 Site Donor 2021
Very common on GM applications, so quite common, given GM's market share. Ford and Chrysler left them in the filter.
Yes ... very common.
25013759 AC Delco Oil Filter Bypass Valve for Chevy De Ville Suburban Impala C10 | eBay
87 V20 Suburban Custom Deluxe Eng Oil Clg(Kc4). 87-88 V20 Suburban (submodel: Scottsdale, Silverado) Eng Oil Clg(Kc4). 89-91 V2500 Suburban (submodel: Scottsdale, Silverado) Eng Oil Clg(Kc4). 91 R2500 Suburban Base.
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As long as the filter bypass pressure setting is equal to or greater than the bypass pressure setting in the block I can’t see a problem with it.
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