Why 10K Miles Oil change may not be good!

[OVERKILL]

What is debris sweep? How does the described bypass valve help? Can you provide an image of such a valve? It would be nice to compare to a non-threaded valve.

Old diagram from Ford:

 

[BigShug681]

Old diagram from Ford:
View attachment 111500

Now would this effect all after market filters? Other than Ford? Makes me question my choice of Fram Ultra for my 4.6 in the crown Vic

 

[Thermo1223]

Well that was quite a read.

I guess I will just go on my heathen ways in the VW 10k OCI cycle, lol.

The truck's OLM seems to recognize my short tripping & excessive throttle usage at times. So it has been forcing oil changes a lot earlier than expected but I feel it may be a tad conservative. So I may just head to 5k OCI's with M1 0w40 since it never failed me in the past.

 

[OVERKILL]

Now would this effect all after market filters? Other than Ford? Makes me question my choice of Fram Ultra for my 4.6 in the crown Vic

Beauty of the synthetic depth filtration media is that the particulate tends to embed in the media and not be inclined to rinsed off the surface like with conventional media, so it wouldn't be as likely.

And yes, if you have a filter mounted with the dome end down, this is a possible issue for you.

That said, I don't know how much of a "real" issue it is in service. The vast majority of filters aren't produced in the manner that Ford requires for their Motorcraft ones.

 

[The Critic]

He didn’t even pull the valve from the head, used the wire brush to clean the carbon build up, didn’t test the head for integrity, no chemical cleaning of the head and parts (just some break cleaner and good to go), didn’t prep the head surface and so on and so forth. There was nothing that I liked in the video (not the 5k oil change preaching but how he actually worked on that car)

It wasn’t part of the service…

 

[Elkins45]

He answers some of those questions in the intros.

I agree with some of what the guy says.

He clearly has an agenda (5000 mile oil changes) as he alludes to i think part of the problem here is what kind of oil dealers are pumping. But Toyota does not have the best record with oil control rings and pistons. Prius have rep of using oil, the 2.4 or 2.5 have known issues with piston design. Frankly if someone had gone into the bottom end and cleaned the oil squirters and done a piston soak when it started using 1qt per thousand it probably could have been saved. Especially since he claims the squirters are "always plugged" (WHY)... The engine is clean why are the squirters plugged?

One should have no problem figuring out I'm not a member of the Toyota fan club, but the cleanliness of that engine points to something other than OCI...

I watched a video where a guy rebuilt his 2az-fe oil burner because it was past the time where he qualified for the factory service campaign. He bought the Toyota rebuild kit with the new pistons and rings. One of the things he mentioned is that the rebuild kit includes a new set of piston squirter nozzles.

 

[Brian123]

I watched a video where a guy rebuilt his 2az-fe oil burner because it was past the time where he qualified for the factory service campaign. He bought the Toyota rebuild kit with the new pistons and rings. One of the things he mentioned is that the rebuild kit includes a new set of piston squirter nozzles.

Do you have a Link to the Video?

 

[Elkins45]

Do you have a Link to the Video?

Right at the beginning.

 

[Bill7]

Each person can answer this question easily for themselves by asking the following question:
Question: "If I were buying an expensive used car, would I prefer the previous owner to have done 5k or 10k oil changes?".

I bet 100% of the people would want the 5k oil changes done by the previous owner. It's that simple.

 

[JohnnyG]

This was all covered on the OTHER OTHER thread. Has nothing to do with oil change frequency, except for the fact that the oil cooling nozzels plugged up for some unknown reason. Either the oil was of low quality for the service this engine was used in, or some kind of water/coolant intrusion. The other possibility was an overheating episode, which we have no information on.
Only cyl 1 and 4 were damaged if I recall correctly.

 

[OVERKILL]

Each person can answer this question easily for themselves by asking the following question:
Question: "If I were buying an expensive used car, would I prefer the previous owner to have done 5k or 10k oil changes?".

I bet 100% of the people would want the 5k oil changes done by the previous owner. It's that simple.

Depends on what they ran in it. If they ran 10K with AMSOIL SS or M1 EP vs 5K with Supertech/Kirkland/Part Store special, I'd choose the 10K engine.

 

[billt460]

Only cyl 1 and 4 were damaged if I recall correctly.

How many have to be damaged?

 

[JohnnyG]

How many have to be damaged?

For the damage to be caused by too long an oil change interval, all would be impacted similarly.
For only two to be damaged leads me to think something else is going on. Those piston cooling jets should not have plugged.

 

[billt460]

For the damage to be caused by too long an oil change interval, all would be impacted similarly.
For only two to be damaged leads me to think something else is going on. Those piston cooling jets should not have plugged.

But they DID plug. And when they did it allowed the pistons to overheat, there by coking the oil, which in turn froze up the oil rings, which then scored the cylinder.

No matter how you look at this, it all comes back to the oil clogging the 2 cooling jets on the 2 scored cylinders.

 

[OVERKILL]

But they DID plug. And when they did it allowed the pistons to overheat, there by coking the oil, which in turn froze up the oil rings, which then scored the cylinder.

No matter how you look at this, it all comes back to the oil clogging the 2 cooling jets on the 2 scored cylinders.

Or the rock catcher oil filter...

 

[DuckRyder]

I watched a video where a guy rebuilt his 2az-fe oil burner because it was past the time where he qualified for the factory service campaign. He bought the Toyota rebuild kit with the new pistons and rings. One of the things he mentioned is that the rebuild kit includes a new set of piston squirter nozzles.

The fact that these are included in the "kit" would seem to point to the strong possibility they know there is something rotten with the original ones.

Again this is a Toyota design problem not an oil change problem no matter how the BITOG Toyota lovefest committee wants to spin it.

 

[buster]

Each person can answer this question easily for themselves by asking the following question:
Question: "If I were buying an expensive used car, would I prefer the previous owner to have done 5k or 10k oil changes?".

I bet 100% of the people would want the 5k oil changes done by the previous owner. It's that simple.

What if the guy doing 10k changes was using Mobil 1/Amsoil etc.? I'd have no problem in that instance.

I'm impartial to it because there is no right or wrong. Depends on a lot of things.

I'm not one to cut corners on oil quality though either.

Pretty much everyone I know uses the cheapest oil available at OLM intervals. In most cases that is sufficient.

 

[OVERKILL]

The fact that these are included in the "kit" would seem to point to the strong possibility they know there is something rotten with the original ones.

Again this is a Toyota design problem not an oil change problem no matter how the BITOG Toyota lovefest committee wants to spin it.

TDS is real!

If you saw the patent I shared earlier, it seems Toyota has implemented a valving assembly along with a screen in the units making them far more complicated than one might originally assume. Perhaps that's the source of the issue?

 

[Thermo1223]

TDS is real!

If you saw the patent I shared earlier, it seems Toyota has implemented a valving assembly along with a screen in the units making them far more complicated than one might originally assume. Perhaps that's the source of the issue?

Subaru did the same thing with banjo bolt screens on the actuator valve for cam phasing thinking it would save the valve when in fact it caused for more issues even with regular oil changes. I also think there were screens for the turbo as well. They learned quickly this was a bad idea.

It would not surprise me if that screen is the cause.

 

[BigShug681]

But they DID plug. And when they did it allowed the pistons to overheat, there by coking the oil, which in turn froze up the oil rings, which then scored the cylinder.

No matter how you look at this, it all comes back to the oil clogging the 2 cooling jets on the 2 scored cylinders.

Am I missing something that undoubtedly proves the OCI caused this? If it was the oil how is the rest of the engine extremely clean and also why would only 2 squirters be effected and not all 4