PureOne knocking

[Eddo]

I have a light knock on a cold start-up that probably last 30-60 seconds. Kind of sounds like marbles rattling around. Very similar to a diesel engine. I've never really noticed it before. I could have just never paid attention, but I doubt that. I seem to notice things like that.

Anyways, I put a Pure One filter and it has a little bit of a knock on start-up. I normally run just the Purolator Premium or something like Motorcraft or Bosch Premium. I don't think it is the ADBV because the filter sits pretty much vertical near the bottom of the engine so very little if any would leak out.

Actually, this is my second Pure One in 2000miles. The first one leaked, just a little bit but about a drop or two a day. Maybe I just put it on wrong, but I've put on many filter before and never had a problem.

I did a search and it seems pretty common to have a start-up knock with the PureOne. Is this knocking caused by the filter? If it might should I go ahead and change out the filter, or assume that the knock will not cause any damage and wait to my next oil change.

 

[Gary Allan]

I'd say that it's uncommon for problems with a PureOne, Eddo. That doesn't mean that a PureOne doesn't bring this out in certain engines more then others ..just that the problem doesn't occur much to begin with. PureOne would be a filter that could present the most resistance to flow.


..but let's get the essentials. Engine? Mileage? In a typical engine the filter should be transparent for the most part. If you've got an older engine that may have a few minor issues from advanced age ..then sure. You may have a weaker then spec pressure relief valve and you're seeing the brief effect of "things at rest tend to want to stay at rest".

Would I be correct in that you don't experience this when the oil is warm? That is, it does't occur with every start ..just an overnight/8 hour/extended shut down?

It can obviously be relieved with a different filter ..but I don't believe that it's anything more then annoying.

 

[dickwells]

Be aware that the position of the filter has no (or minimal) effect on leakdown. It is the oil in the passages going up to the cam, crank, and lifters that can leak back and have to be refilled upon startup if the drainback valve is bad. Good luck, RW

 

[Eddo]

quote:

---

Originally posted by Gary Allan:
I'd say that it's uncommon for problems with a PureOne, Eddo. That doesn't mean that a PureOne doesn't bring this out in certain engines more then others ..just that the problem doesn't occur much to begin with. PureOne would be a filter that could present the most resistance to flow.


..but let's get the essentials. Engine? Mileage? In a typical engine the filter should be transparent for the most part. If you've got an older engine that may have a few minor issues from advanced age ..then sure. You may have a weaker then spec pressure relief valve and you're seeing the brief effect of "things at rest tend to want to stay at rest".

Would I be correct in that you don't experience this when the oil is warm? That is, it does't occur with every start ..just an overnight/8 hour/extended shut down?

It can obviously be relieved with a different filter ..but I don't believe that it's anything more then annoying.

---

Thanks, Gary.

Its a 3.7L V6 OHC engine in a Jeep. Doesnt have lifters but according to the Tech Service Manual it has hydraulic lash adjusters. According to the TSM "The valves are opened by using roller rocker arms which pivot on hydraulic lash adjusters"

The engine has 40k on it has been well maintained with regular oil change using mainly M1. Runs excellent and have done some UOA and everything looks good. And yes it only occurs on a cold start after it has been sitting for quite a few hours.

 

[Eddo]

quote:

---

Originally posted by dickwells:
Be aware that the position of the filter has no (or minimal) effect on leakdown. It is the oil in the passages going up to the cam, crank, and lifters that can leak back and have to be refilled upon startup if the drainback valve is bad. Good luck, RW

---

But wouldn't that only take a matter of 5-10 seconds if that. Similar to when you change the oil it clatters for about the first 5 seconds or so. Mine definitely lasts longer than that. More like a good 30-60 seconds. Normally, I just let it idle and warm up for a minute until the noise pretty much goes away before I pull away.

 

[unDummy]

Swap the filter and see if problem goes away. Don't forget to top off the oil after the filter swap.
If problem goes away, don't use the Pureone!

 

[Triple_Se7en]

I do not like the idea of 40W oils with DOHCs or even single OHCs.

Go back to your former filter brand & use a thinner oil.

Just my opinion....

 

[Gary Allan]

Now I didn't read every word over again ..but I didn't see 40 weight oil mentioned anywhere

His last UOA states M1 5w-30 EP

Eddo, HLA's are eraser tip kinda things with metered holes through them that allow oil to pass. They rest in a bore on the end of the rocker. The holes are designed to pass a limited volume of oil ..allowing the bore to be pressurized ..extending the adjuster to maintain contact. They're sometimes called lifters ...a misnomer but it's just a misuse of nomenclature ..the effect is the same. They take up slack in the valve train.


I believe that your engine uses the 3/4-16 thread like most other DC products. If you have room, then you can perhaps fit it with a longer filter. This should reduce any resistive component of the filter during that brief period. This would allow you to keep the fine filtration of the PureOne and eliminate the noise.

..or..as tripsev suggests ..go back to the old setup

 

[muddawgs]

hmm, i also had a light knock with the quaker state/puro filter from menards after a change. i know it's not pureone quality but it was the same style. i swapped back to a old clearanced fram that was left and it was gone. i figured the filter was bad and tossed it and took the others back.