"Priming" chain tensioners after car sat for months?

[austin1346]

My 2011 S4 has been sitting for a few months and I was curious if there's a way to "prime" the engine to build oil pressure in the chain tensioners before fully starting it. It has the cold-start chain rattle but it only does it for a split second after sitting for more than 3-5 days. Last time I started it after a few months of sitting the chain rattle happened (only for a second or so like always), but it was much louder than normal, sounded like the oil totally leaked down out of the tensioners.

I know on some vehicles in the US you can hold the accelerator down to the floor and then try to start it, and it will allow you to crank the engine and build oil pressure without starting. Does this work on B8s? I guess I could just pull the fuel pump fuse or the HPFP wire but it would be much easier to just hold the accelerator. I'd try it but I don't want to risk cold starting it at full throttle by accident. Couldn't find anything related on google other than pulling the fuse.

Also is this even necessary? I'm thinking starting it like normal would do just the same thing but quicker and yield the same results.

Thanks.

[egebhardt]

I don't know any gas pedal trick.
Pulling the fuel pump fuse is a good answer.
Maybe pull the connections to the coil-packs too.
Turning it over is likely the best way to build oil pressure and get it lubed before 1,500 rpm hits it.

The ultimate fix is pulling the engine and replacing all that crap on back. Clearly delay that job or sell the car.

[Nillious]

The car will still start with the fuse pulled as there is still fuel in the high pressure circuit. Honestly I’d just start it. 1000s of these cars rattle for 3-4 seconds on start and they do it a few hundred times a year. I doubt one rattling start will hurt anything.

If you insist on priming it just unplug the coil packs. Don’t crank it too much though cause it will flood it.

[austin1346]

Yea the best thing would be to replace the upper tensioners as that is generally what causes this, and no engine out required.

Technically it IS in spec though according to Audi, for what it's worth.

Some day in the future I want to pull the engine and refresh everything, however, I don't have the equipment, space, or knowledge to do so at the moment. Also, I figured since it's still in spec I'll wait a few years until the car loses most of it's value, that way if I screw anything up it won't matter much.

For now I'll just start it like normal then. Thanks.