This Wix 51061 filter specs no bypass valve, so what happens if it gets clogged or if the oil is cold and really thick? Does the engine run with NO oil circulating or is there some other way oil moves around the filter?
Oil filter without a bypass valve
- Thread starter fozzdesy2001
- Start date
dnewton3
Staff member
These are spec’d for applications which have a BP elsewhere; typically in the block at the filter mount. Was very common in many GM engines, but not isolated to that brand.
Also, many hydraulic filters have no BP.
Also, many hydraulic filters have no BP.
My ole chevy v8s has a bypass in the adapter between the filter and the block and another in the oil pump.
BrendanC
$100 site donor 2024
my silverado also has the bypass built into the block. uses a fram 3675 sized filter without a bypass.
Thank you it is for a 88 Chevy 6.2 honestly, this must have been in bypass for a long time due to how tight and hard the filter was to take off. The date code on the filter was from 2016! the dents from the previous removal attempts combined with all the crude on the can leads me to believe it has more than 5 years in service, probably clogged after the first 2.
Your engine block has a bypass located somewhere within if the OEM calls for a no bypass filter. Imo the built in block bypasses are supervisor to filter bypases on account of you're not relying on how cheaply the filter maker can slap together a bypass and no bypass in the filter also means no risk of sucking up sludge off the bottom of the filter and sending it into the inner workings of the engine.
I've completely disassembled 6.2, 6.5 diesel engines and the 6.2L diesel for sure has a weak bypass up in the filter adaptor.
Thank you, that adapter made taking the filter off a nightmare! I want to replace it with a remote so if I do get rid of the adapter that means I should find a filter with a bypass correct?
BrendanC
$100 site donor 2024
IMO, the Ford FL1a, fram PH8a sized filter is what i would want as a remote filter. i’ve thought about running two in parallel for extended filter life.
You'll still use the block filter adaptor even with a relocation kit. So no need for a bypass filter. That factory bypass is probably going to start bypassing at 3 to 5psid. So even if you do run a bypass filter it likely won't get used.
Have you seen the extended and ridiculously extended run time cut open filters on here?
I just cut one open that had been on a 16L heavy duty diesel engine for 1,344hrs and it looked like it was still serviceable.
Another guy cut open an old fram titanium with 73,000 miles, still looked great.
Lots of other filters get cut open with the normal 50 to 300hr run time and they're looking almost new.
The only engines that have oil filters full of nasty stuff are engines that hadn't had their oil changed in a timely manner.
That has nothing to do with how hard the filter was to remove.
It was hard to remove because it was on the engine for a very long time.
Hard to believe it would be set that low ... new filters would even be bypassing at higher RPM with hot oil, and certainly filters would with debris loading. I know the LS series of GM engines have the built-in filter bypass set to 10-12 PSI.
Third of an inch surface area and it took about 17oz to off begin off setting it.
What's the diameter of the bypass valve?
Whatever gm was using back in the 1980s. I remember I came out to a third of a square inch.
The valve is in the oil filter adapter
