Honda 1.5T Valvetrain Pictures at 133K.

The Critic said:
There are two UOAs posted of this vehicle. Both showed >5% fuel dilution. Camshaft lobes continue to look fine, but I will admit that this vehicle gets driven very gently and sees mainly highway miles.
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I am still boggled by the fuel dilution. GREATER THAN 5%?!?!. Holy. Wife never had more than 1%. Same 2017 CRV Touring around 120K miles I believe.

Amsoil 0W-30, Premium every tank. It must be our longer drives. But I have been doing 12 month OCI regardless of miles for the last 3 years+ (since we moved)

Valve adjustment ours looked similar, people are just seeing oil I think..........

Yes I will do a UOA this time even if I change oil a bit early (not a full year).

New plugs at the same time the valves checked, seems like MPG went up a tad according to wife unit.

How much did the valves need adjusting?
 
Pablo said:
I am still boggled by the fuel dilution. GREATER THAN 5%?!?!. Holy. Wife never had more than 1%.
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Hard to believe. High levels of fuel dilution is a 1.5T trait.

Pablo said:
How much did the valves need adjusting?
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Not much at all - probably could have skipped the service altogether. Almost all of them were pretty much dead on.
 
JHZR2 said:
What do I see on those cams? What’s the brown, and why are the lobes looking worn?

MB diesel cams with twice that mileage look like new, compared to that. Does this one look so dirty and worn because of the low viscosity oils, or the valve actuator approach or something?

I’d guess that our 2.0 and 3.5 will look like this, but time will tell.

Is that a giant handle for a feeler gauge?
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Tough audience. It doesn’t look new to me, but I am not seeing wear on those lobes. I see the color change on the contact area, but not the wear.
 
TomYoung said:
Tough audience. It doesn’t look new to me, but I am not seeing wear on those lobes. I see the color change on the contact area, but not the wear.
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Well it isn’t exactly a close up photo. But it is obvious that there are variations on the lobes, which may or may not be normal. But they’re much more obvious than the wear/contact marks on my MB diesel cams which I’ve been messing with a lot recently. Thus the question…

Before too long I’ll probably do a valve adjustment on our 3.5 and 2.0H Honda engines, so knowing what I’m looking at is valid.
 
Nice to hear a good report on the 1.5. I read of some complaints but there are millions of those engines out there. Looks ok to me especially for the longer duration oil changes.
 
The Critic said:
Hard to believe. High levels of fuel dilution is a 1.5T trait.
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It's hard to believe that trait wasn't noticed in initial testing of that engine. Yet here we are with several years in the books, and fewer problems than most would expect.
Of course there was that update to the programming, but still the oil dilution persisted.
Interesting long term experiment still ongoing. Thanks for the pics.
Edit: After witnessing many drain plugs removed, and the oil shooting out like water, 5% is probably very low on the scale of what many of these engines have been through.
 
joekingcorvette said:
Nice to hear a good report on the 1.5. I read of some complaints but there are millions of those engines out there. Looks ok to me especially for the longer duration oil changes.
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That's the interesting thing about this engine. Despite the high fuel dilution and sporadic HG issues, these engines tend to run a long time without a problem.
 
ARB1977 said:
5% fuel doesn’t take much considering these engines only hold 3.7 qrts of oil. I just went up a grade in the 19 Pilot to Amsoil 0W30 since it’s DI.
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I'd bet that I've seen 5-6 quarts shoot out like a fire hose, several times on drain.
It was hard to guess where to position the drain bucket at times.
The initial complaints were "fuel smell" in the garage. So imagine how much dilution that would take.
 
Mechanician said:
I'd bet that I've seen 5-6 quarts shoot out like a fire hose, several times on drain.
It was hard to guess where to position the drain bucket at times.
The initial complaints were "fuel smell" in the garage. So imagine how much dilution that would take.
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These people must just move the car and/or drive very short distances after starting.
 
Pablo said:
These people must just move the car and/or drive very short distances after starting.
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That was back when they first hit the streets.
After the updated programming, the frequency did go down quite a bit. But it didn't completely disappear.
(What I saw was in the great white North.)
 
The Critic said:
View attachment 232723
I was in a hurry, so only one decent photo was taken.

133K on vehicle. It is a 2017 CR-V with the 1.5T. Up until the 112K mark, I performed every service using Mobil 1 EP 0W20 at 10-11K intervals per the OLM. Between 112-133K, it received two oil changes with dealer bulk 0W20; one of which had BG MOA added.

View attachment 232726

There are two UOAs posted of this vehicle. Both showed >5% fuel dilution. Camshaft lobes continue to look fine, but I will admit that this vehicle gets driven very gently and sees mainly highway miles.
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Can you post link to your previous UOA? I’m having a hard time finding them.
 
I’m pretty sure Critic would recognize cam wear if there was any.

The cams ride on a roller follower so it will drag oil all over the contact surface, unlike the bucket over shim designs.
You can even see the same brown oil pattern on the rollers.
IMG_4005.webp
 
JHZR2 said:
Well it isn’t exactly a close up photo. But it is obvious that there are variations on the lobes, which may or may not be normal. But they’re much more obvious than the wear/contact marks on my MB diesel cams which I’ve been messing with a lot recently. Thus the question…

Before too long I’ll probably do a valve adjustment on our 3.5 and 2.0H Honda engines, so knowing what I’m looking at is valid.
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Normal for this style of roller followers, they leave "tracks". Base circle will appear matte, while the ramp and nose will get shiny from pressure. Contact patch is much narrower in appearance than with a non-roller follower.

Edit: I see that @KrisZ beat me to this, lol.
 
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