2016 Camaro 3.6L P0017 With Alot Of New Parts
2016 camaro unknown background auction car
Was towed in as a no crank which was a bad key. After a new fob was programmed we had a crank no start.
Cranking cadence was off and performed compression test and found low on all cylinders. We pulled valve covers and found timing chains stretched and both exhaust cam phasers unlocked. Engine is very clean inside so we installed new chains phasers and guides all genuine dealer parts.
Upon initial start up the engine runs well but as soon as the phasers are actuated and it returns to idle p0017 sets and idles rough. Swapped vvt solenoids but issue remained on the same cam.
We found exhaust cam phaser unlocked and obtained replacement from dealer. But the same symptoms reoccured. At this point I am expecting an oil pressure issue so we pulled the valve cover and cranked the engine with the cam caps that have vvt oil flow removed and observed poor oil flow to the cam that was not locking the phaser.
We removed the oil pump and replaced with new dealer part and re tested oil flow and found approximately three times the oil volume when cranking the engine. We also replaced the exhaust camshaft to ensure the oil seals where in good condition as i have had issues in the past on bmw/mini with the same symptoms.
Guess what same symptoms returned p0017 and exhaust phaser not locking. Im wondering if anyone else has run into similar issues with this engine or has an idea where to look next.
Hello Eliot, Are you certain they gave you the correct new exhaust cam? Or did you only replace the seals. The way it written is a little confusing. Camshaft Bank 1 sensor B leans toward the exhaust cam having an issue. Here is a video I found that talks about a GM extended warranty. It also mentions the tensioners. bing.com/videos/search…
Yes I replaced the complete cam. I am sure it is the correct one as it is longer than the others do drive the hpfp.
Please don't take offense to my comment, but want to make sure you know that bank 1 is the right bank on the 3.6L (unlike most GM engines)?
No Offense taken, just repeating the information. I enjoy the way they switch things up every few years. LOL
No offense taken. We are looking at the right bank exhaust cam and it is the one that phaser will not lock.
Almost every transverse engine on a GM has Bank 1 on the firewall side. So it is LIKE every other transverse V6 in GM's history. Longitudinally mounted engines (V6/V8) are Driver's side oriented, but not the transverse engines.
I was specifically referring to the longitudinally mounted engines such as is found in the Camaro (although in all fairness I did not call that out).
Yes, the 3.6L is it's own animal: all of them are a right-side orientation, whereas, all the ‘older’ engines were left-side oriented.
Eliot, while there are plenty of chain stretch failure conditions, many are related to poor oil change service intervals and incorrect lubricants on HFV6 engines. This can result in metallic debris in the system. Inspect closely. Secondly, follow the GM published procedure for chain replacements, using the OEM parts and nothing else, or it may haunt you, despite some big name companies offering…
We are only using oem parts from the dealer. They are also ironically the cheapest option.
You are describing an unhappy situation where I am thinking you have an oil supply problem. Where though? I have been a big proponent of using the oil pressure pig to supply the system while poking around and searching. It is messy and not easy without the engine out of the chassis. I will be surprized if you don't have to pull the head off.
I have replaced a few of these pcms for cam sensor codes but the phaser being unlocked has me stuck thinking oil pressure/mechanical fault. What is an oil pressure pig?
A small pressure tank that holds oil (about 7-8 quarts max.) with an air pressure to push the oil out. These pressure gauge equipped pressure tanks will easily operate at 90-100psi through a hose (with a hand operated ball valve for shut off) connected to the oil pressure switch port. I have used ours for over 40 years. No engine gets built without pre-lubing. No timing chain job like this one…
Unknown background auction car scares me. I wish I had something to offer, but I'd be stuck on the phaser unlocking too
We removed cylinder head and oil pan and made sure all oil passages where not obstructed. We reassembled engine and same symptom has repeated itself. New pcm is on order.
Eliot, did you get an oil pressure test performed when you were together? Low pressure will not be enough to push the phaser back to lock at low idle I think.
Might be better to see pressure when hot at idle? Maybe with the actuators disconnected. Which reminds me, are the actuator solenoids new too? How do you know it is not locking I wonder? Does it not return to base timing if you shut the engine off for a while? I might want to put a scope on it to see what the sensors are seeing perhaps?