Can replacing timing chain in gm ecotec result in oil pump failure ?

Based on the symptoms you have described, it is possible that you are experiencing issues with both the timing chain and the sensors. It is not uncommon for a low oil level to cause damage to the timing chain, especially in an engine with high mileage like yours. The reduced power and hard shifting can also be related to timing chain issues.
However, the oil leak and oil residue in the air intake tube could also be indicative of a valve cover gasket issue, as you suspected. This could also explain the brown liquid building up in the air intake tube.
In terms of next steps, it would be advisable to address the oil leak first and replace the valve cover gasket. This should stop the oil from dripping onto the exhaust manifold and eliminate the burning oil smell. Additionally, cleaning the air intake tube and replacing the air filter may also be necessary.
Once the oil leak and air intake issues have been addressed, it would be best to address the sensor codes next, starting with the camshaft and crankshaft sensors. If the codes persist, then it may be necessary to look into replacing the timing chain.
Given the age and mileage of your vehicle, it may be worth considering whether it is worth investing in the repairs. However, if the repairs can extend the life of the vehicle for a few more years, it may be worth it in the long run

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Watch this GM 2 2L Ecotec timing chain replacement 03 Cavalier part 1 Intro and valve...

What year?? If 2003 or earlier, then you need to replace the timing chain guides/tensioners. BUT you said of no oil going there (do you have oil pressure light on in your dashboard??? If so, then you have oil pressure issue, meaning likely oil pump failure), that usually a bad sign of engine failure soon.

plz simple & easy salutation

STOP the engine immediately !!! There is an oil pump failure of 2.0 TDI engines !
Remove the oil pan and the oil pump & balancer shafts assembly.


Either the shaft driving the pump from the balance shaft rounds off or the balance shaft drive gears eat themselves.
The same issue ... low oil pressure warning light, noisy rattling engine, and the turbo has gone. Diagnosis: oil pump balancer shaft assembly ...



Many Passat show excess chain noise and wear anywhere from 50,000-100,000+ miles. Cars have broken the chains/tensioner as low as 65,000 miles. This is just a range of cars that have been reported, diagnosed, and repaired. The actual statistics on dealer repairs or failures is unknown and I've heard cars over 100,000 miles that, in my opinion as a non mechanic (most mechanics wouldn't recognize this sound and problem either), aren't noisy. From what has been reported, noticeable noise/chain-tensioner wear/greater risk of breaking is around 60,000-150,000 miles. Your case may vary. The most obvious symptom is a rattling loose noise from the oil pan. Unless you listen to a Passat TDI with a tight chain and one with a loose chain, it's hard to describe the difference other than rattling chain noise.
The reason the gear drive oil pump modification was started is because a few mechanics who specialize in TDI have seen many worn oil pump chains/sprockets/tensioners. There will always be a few defective parts that come off the assembly line and all mechanical components like chains wear out sooner or later, but in my opinion, the failure rate is abnormal considering the number of Passat TDI sold versus the number of reported oil pump failures. This does not necessarily mean that every or even most Passat TDI will have this problem, just that the reported failure rate is high enough to consider this part a design failure. Nobody, not even VW-Audi knows the average time between failure for these parts and the percentage of cars that will have this problem, but they changed this design and if you want to not have this specific failure, the only sure way is to swap to the geared module.

The best way is to pull the motor out. The timing chain cover needs to come off of the front of the motor (behind the water pump) and this can be done with the motor in the car. The problem comes when you try to put the cover back on. There is a seal that fits in a groove on the bottom of the timing cover. The seal will not let the cover go back into place without damaging the seal. The oil pan needs to be dropped down and then the timing cover goes into place. The oil pan goes on after the timing cover is in place. Any other way will result in premature failure of the timing cover to oil pan seal. If you have enough room under the car and can remove the oil pan, that will work also. I hope this helps.

Most overhead valve engines have a belt. You need to get your engine size, make, model and year and call your local parts house and they can tell you this for sure.

Just the guide is probably making the noise. So either a new guide or a new chain. I would start with guide first, unless chain looks loose or cruddy