rngbartek

Hey,
New to the forum. I have owned my 2014 Q7 since 2019, and in January I believe my timing chain jumped (not sure which one). Vehicle has 174k on it and has been rattling for a while. Was getting misfire on 3 cylinders. I towed the car to my sisters garage and started to slowly take it apart.
I have couple of questions:
What is the best kit that includes all tensioners sprockets and gaskets for the chains.
What is the size of the bell housing bolts that hold engine and transmission together.
Any help would be appreciated.
Thanks

-Wes-

Needs more info: What engine is in your Q7?

rngbartek

It is 3.0 gas engine.

'10Q7TDI_Prestige'

Since you got the gas engine, misfires are pretty common symptom on those related to either fueling or worn ignition components...plugs and coils need replacing at regular intervals, etc, etc., and you will get codes on those. True timing chain rattle is a pretty ugly, guttoral sound, so don't confuse that with the increasingly noisy fuel injector 'ticking' noises at startup, which are pretty common and can get worse over time due to failing injector seals, etc., and the injector seals all fail, as do the injectors eventually. Might be time for some TLC and parts, but don't know that I'd jump to worst case scenario w/o checking for the normal stuff and low-hanging fruit items.

Good luck!

rngbartek

The car had all the signs of timing chain failure. It kept going into "limp" mode when going up hills. When it finally went I was going up a pretty steep hill. Most of components are already off, just need to take off transmission and engine is ready to come out. I will be changing most of gaskets, plus tune up. I will post once my project is complete.

rngbartek

It was also making a noise when accelerating, especially between 2000 to 3000 RPMs. It was coming from the back of the motor.