|
Issues | Warranty | Recalls / TSB Problems, issues, recalls, TSBs |
|
Thread Tools | Search this Thread |
01-28-2023, 03:11 PM | #1 |
Junior Member
Join Date: Jul 2022
Drives: 2015 BRZ
Location: Poland
Posts: 7
Thanks: 0
Thanked 3 Times in 1 Post
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Rebuilt engine cam issue (P0019/P0021)
Hi All,
Need help diagnosing strange behavior after a rebuild. MY15 BRZ - rod knock started a couple months ago at 36k. The Decision was to rebuild the engine using an OEM short block, refurb and clean heads, gasket kit, new plugs... Last week the engine went back in but had issues starting - turns out the cam chain was not put on properly due to wrong instructions sent by Subaru (at least that is what the shop is claiming). The Engine came back out, another expert was called for help and this time the car started successfully. No issue running, oil flushed after the first heat cycle (decided to switch to Millers 5W30). Unfortunately it was not all happy days, P0021 and P0019 errors popped up. Sensors and valves were swapped sides but the codes remained the same. Second issue was detected during a test drive. There is a slight vibration/tapping noise from the chain/valvetrain when off throttle above 2k rpm. After experiencing rod knock, all noises like that give me chills... Apart from that it is running fine, no issues idling or accelerating. I am not pushing it above 3-3.5k rpm as it is a brand new short block but seems to drive fine apart from the noise. I cleared the DTCs, went for a drive and they did not come back (yet?). My mechanic is suggesting to drive it for a bit, until the oil change in 1-1.5k. Then decide if we need to replace the cam chain with a new one (old one was put back on after rebuild) and do further diagnostics on the error codes if they persist. I am however not convinced. At this point I have no clue if the suggested new cam chain will really solve the issue and what's more if it's safe to keep driving it. Any experiences like that or advice on what to check? |
01-28-2023, 03:20 PM | #2 |
ProCrastinationConsultant
Join Date: Sep 2013
Drives: '14 Ranger, '18 Tacoma 4Dr LB
Location: chicago-ish
Posts: 11,330
Thanks: 35,240
Thanked 13,673 Times in 6,781 Posts
Mentioned: 98 Post(s)
Tagged: 0 Thread(s)
|
do you have more details on how the cam chain wasn't installed properly?
my first suspicion anytime a code pops up in a case like this is the sensor. it sounds like you tried checking this by swapping the sensors on each side. i'm not fully convinced that a sensor wasn't damaged, but i'd also be wary of assuming that the timing chain is fully installed correctly if you're getting odd valvetrain noises. iirc, the tensioners aren't always re-usable, so if they're re-using it from the 'incorrect procedure' method, it's possible they damaged the tensioner removing and reinstalling it.
__________________
"The time you enjoy wasting is not wasted time"
|
01-28-2023, 04:04 PM | #3 |
Senior Member
Join Date: Jan 2018
Drives: Crapcan
Location: Oregon
Posts: 11,167
Thanks: 18,159
Thanked 16,325 Times in 7,383 Posts
Mentioned: 107 Post(s)
Tagged: 0 Thread(s)
|
I recommend you stop driving the car and find a new shop to work with that is more familiar with FA engines. P00019/00021 is not one you want to ignore and drive around on.
__________________
"Experience is the hardest kind of teacher. It gives you the test first and the lesson afterward." -Oscar Wilde.
|
The Following User Says Thank You to NoHaveMSG For This Useful Post: | soundman98 (01-28-2023) |
01-28-2023, 04:40 PM | #4 |
義理チョコ
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 31,871
Thanks: 52,137
Thanked 36,521 Times in 18,922 Posts
Mentioned: 1107 Post(s)
Tagged: 9 Thread(s)
|
nope. I don't know how long it takes for those IPVs to slew out, but I'm thinking new ECU at this point. OP needs a guy that knows techstream to be certain.
__________________
|
The Following User Says Thank You to Ultramaroon For This Useful Post: | x808drifter (01-29-2023) |
01-29-2023, 12:15 PM | #5 | |
Junior Member
Join Date: Jul 2022
Drives: 2015 BRZ
Location: Poland
Posts: 7
Thanks: 0
Thanked 3 Times in 1 Post
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Thanks for your suggestions - I will definitely stop driving it and try to resolve this.
Would you say that the next step should be to redo the timing with a new chain and tensioners? Hoping that solves the noise issue at least. If the DTCs persist, then the old chain/timing/tensioners could be excluded from the list of potential causes... Also, I've read that there has been a TSB for sensor clearance, probably also worth checking right? BTW finding a local shop with any experience with FA motors has been difficult - even the official Subaru dealer/service said they have never done this sort of work when I reached out to them for a quote. Quote:
Is there no way to reset/flash the ECU back to 'factory' settings? |
|
01-29-2023, 07:33 PM | #6 | |
義理チョコ
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 31,871
Thanks: 52,137
Thanked 36,521 Times in 18,922 Posts
Mentioned: 1107 Post(s)
Tagged: 9 Thread(s)
|
Quote:
First the VVT servo does a sanity test to verify that it knows approximately where the camshafts are relative to the crank. If it is reasonably close, it sets an "ok" flag and goes through a calibration cycle which updates the initial position value for each cam. If the saved initial value swings too far out for whatever reason, when the root cause is suddenly corrected, because the saved initial position is always applied, the system never passes subsequent sanity checks because it's too far out of whack. I don't know why it was done that way. The flawed logic is a severe handicap for the system but here we are. I hope it's not the case for you. Techstream would give us a conclusive answer in minutes.
__________________
|
|
The Following 5 Users Say Thank You to Ultramaroon For This Useful Post: | CTB727 (02-08-2023), NoHaveMSG (01-29-2023), RedReplicant (01-31-2023), soundman98 (01-30-2023), x808drifter (01-30-2023) |
01-29-2023, 09:39 PM | #7 | |
Senior Member
Join Date: Jan 2018
Drives: Crapcan
Location: Oregon
Posts: 11,167
Thanks: 18,159
Thanked 16,325 Times in 7,383 Posts
Mentioned: 107 Post(s)
Tagged: 0 Thread(s)
|
Quote:
__________________
"Experience is the hardest kind of teacher. It gives you the test first and the lesson afterward." -Oscar Wilde.
|
|
The Following 3 Users Say Thank You to NoHaveMSG For This Useful Post: |
01-30-2023, 02:41 PM | #8 |
Junior Member
Join Date: Jul 2022
Drives: 2015 BRZ
Location: Poland
Posts: 7
Thanks: 0
Thanked 3 Times in 1 Post
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Damn, reading through the forum and all the posts regarding cam timing DTCs sure is depressing. I Was really hoping that replacing a shortblock would be the end of my nightmares with this engine...
I've checked with the workshop a bit more and they have already tried swapping around the sensors and ocvs, the same P0021 kept popping up.P0019 was logged when they initially put back the motor with wrong timing. @Ultramaroon thanks, really appreciate your explanation. I can see now that there really seems to be this issue where an ecu gets stuck with wrong learned values. Coming from a SW engineering background, it still baffles me that it's been released like that. A couple more questions that trouble me:
|
01-30-2023, 04:26 PM | #9 |
義理チョコ
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 31,871
Thanks: 52,137
Thanked 36,521 Times in 18,922 Posts
Mentioned: 1107 Post(s)
Tagged: 9 Thread(s)
|
Don't let it discourage you. Once it's in order, it works beautifully. I'm not familiar with SSM but I imagine that all the same information can be extracted.
VVT hydraulics aren't significantly/functionally affected by oil viscosity. There's a lot of misinformation out there. I've given up correcting stuff every time I see it. This thread is old and long but it is where I spent most of my time helping/learning. The ECU might still be ok. Don't swap it until you're certain.
__________________
|
The Following 3 Users Say Thank You to Ultramaroon For This Useful Post: |
01-30-2023, 08:55 PM | #10 | |
ProCrastinationConsultant
Join Date: Sep 2013
Drives: '14 Ranger, '18 Tacoma 4Dr LB
Location: chicago-ish
Posts: 11,330
Thanks: 35,240
Thanked 13,673 Times in 6,781 Posts
Mentioned: 98 Post(s)
Tagged: 0 Thread(s)
|
Quote:
you already tried swapping sensors, which should rule out most electronic problems. yes, you could have 2 bad sensors, or a bad ecu, but they're much more distant possibilities. my current vote is that there's a mechanical error in the system.
__________________
"The time you enjoy wasting is not wasted time"
|
|
The Following 2 Users Say Thank You to soundman98 For This Useful Post: | NoHaveMSG (01-31-2023), Ultramaroon (01-30-2023) |
01-30-2023, 08:57 PM | #11 | |
Senior Member
Join Date: Jan 2018
Drives: Crapcan
Location: Oregon
Posts: 11,167
Thanks: 18,159
Thanked 16,325 Times in 7,383 Posts
Mentioned: 107 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Looking at it, you may be able to verify timing by pulling the OCV's and turning the crankshaft pulley. Just be careful with the aligning the keyway with the crankshaft extension and oil pump or you could damage parts. Ultra has the service manuals in his sig. You could potentially have a plugged OCV filter. These are in the head and are held down by the cam carrier assembly. You also could have debris affecting the cam gear and not allowing it to cycle properly. I believe SSM is similar to techstream. Both should show you the cam timing values. You can go through the check procedure in the manual. Edit: I just went out and checked and you CAN see the cam timing marks on the sprocket with the OCV's removed. So verifying timing without pulling the engine apart looks possible.
__________________
"Experience is the hardest kind of teacher. It gives you the test first and the lesson afterward." -Oscar Wilde.
|
|
The Following 2 Users Say Thank You to NoHaveMSG For This Useful Post: | soundman98 (01-30-2023), Ultramaroon (01-30-2023) |
01-30-2023, 11:09 PM | #12 |
義理チョコ
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 31,871
Thanks: 52,137
Thanked 36,521 Times in 18,922 Posts
Mentioned: 1107 Post(s)
Tagged: 9 Thread(s)
|
This is the third cool trick I've leeched off of you. First was the homemade guide pins for the timing cover. Second was the cardboard screw holder shadow board.
__________________
|
The Following 2 Users Say Thank You to Ultramaroon For This Useful Post: | NoHaveMSG (01-30-2023), soundman98 (02-01-2023) |
01-30-2023, 11:26 PM | #13 |
Senior Member
Join Date: Jan 2018
Drives: Crapcan
Location: Oregon
Posts: 11,167
Thanks: 18,159
Thanked 16,325 Times in 7,383 Posts
Mentioned: 107 Post(s)
Tagged: 0 Thread(s)
|
I honestly wouldn't have thought to check if the OP didn't ask. I thought the timing marks were farther out on the sprocket.
__________________
"Experience is the hardest kind of teacher. It gives you the test first and the lesson afterward." -Oscar Wilde.
|
The Following 2 Users Say Thank You to NoHaveMSG For This Useful Post: | soundman98 (02-01-2023), Ultramaroon (01-30-2023) |
01-31-2023, 03:53 PM | #14 |
Junior Member
Join Date: Jul 2022
Drives: 2015 BRZ
Location: Poland
Posts: 7
Thanks: 0
Thanked 3 Times in 1 Post
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Many thanks for all the helpful tips!
Gives me a bit of hope that I can finally enjoy the car. I'll schedule some time with a tech who knows SSM. We'll verify the timing and go through the procedure. I'll report back what we find |
The Following 3 Users Say Thank You to hu60 For This Useful Post: |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
To everyone else who has rebuilt an engine | demasrv | Engine, Exhaust, Transmission | 18 | 02-02-2022 11:34 PM |
FR-S engine rebuilt and knocking | DJjoey0812 | Issues | Warranty | Recalls / TSB | 2 | 01-16-2020 06:46 PM |
Good Performance shops to get a engine rebuilt | reckless_brz | Southern California | 47 | 01-19-2016 12:25 AM |
Major accident/Engine failure after repeated P0351/P0017/P0019 | DB86 | Issues | Warranty | Recalls / TSB | 48 | 09-16-2014 03:05 PM |
Testing a Rebuilt Engine | Exage | Other Vehicles & General Automotive Discussions | 0 | 04-29-2011 09:42 PM |