No, not a bad thing.My daughters 2002 Avalanche with 5.3L has a bypass in the block and the ACD filters (PF46/PF61) don’t have one but the Microgard Select which I prefer (51522) does have one.
Is doubling up 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?My daughters 2002 Avalanche with 5.3L has a bypass in the block and the ACD filters (PF46/PF61) don’t have one but the Microgard Select which I prefer (51522) does have one.
Is doubling up 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?
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.How common is it for the engine to have its own bypass valve? I haven’t had any auto engines apart but I’ve had a few inline four motorcycle engines apart and they all had a pressure bypass built into the oiling system.
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. …www.onallcylinders.com
For a SBC, 15 - 18psi
Cant really find anything concrete for a LS block...
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.
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.
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.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...
View attachment 194985
I noticed a little bit farther down in that article they say 17-18 PSI ... so not sure which statement is accurate.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.
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.Is doubling up a bad thing…?
Very common on GM applications, so quite common, given GM's market share. Ford and Chrysler left them in the filter.How common is it for the engine to have its own bypass valve? I haven’t had any auto engines apart but I’ve had a few inline four motorcycle engines apart and they all had a pressure bypass built into the oiling system.
Yes ... very common.Very common on GM applications, so quite common, given GM's market share. Ford and Chrysler left them in the filter.
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.My daughters 2002 Avalanche with 5.3L has a bypass in the block and the ACD filters (PF46/PF61) don’t have one but the Microgard Select which I prefer (51522) does have one.
Is doubling up a bad thing…?
Dirty oil is better than no oilMy daughters 2002 Avalanche with 5.3L has a bypass in the block and the ACD filters (PF46/PF61) don’t have one but the Microgard Select which I prefer (51522) does have one.
Is doubling up a bad thing…?