RPM's sticking around 1600-1700 and groan occurs at 1400 rpm (vid included)

[zachf88]

Got the car back today. Cracked radiator, so they replaced and re-pressurized the coolant system. Everything seemed fine, until about 40 miles after I picked it up. I get a groan/rattle around 1400rpm and I noticed when I rev the engine, the rpm's drop at a constant speed until 1600-1700 where they catch and slow down significantly.

It occurs no matter if a/c is on or not, and when stationary and moving. Started to occur once the car was warm, but now does it when cold.

CLIFFNOTES:Took iPhone video of the problem....


Thanks in advance guys

[NY07RS4]

Can't view the video on my PC...? Weird.

[RAudi Driver]

Zach, it appears to look normal to me. I think mine may hang up a second at that rpm also, but i can't be sure it that. I'll check it today. I really didn't hear the groan or rattle in your vid, however, you know your car better than I do. Maybe the dealer forgot to plug in a vacuum line and it's holding up your rpms.

Whatever the case is, please post when you figure it out.

[pierl]

my GF r32 did that last summer .. and it was the AC compressor that failed.

[zachf88]

I guess it's back to the dealer..... urgh!

*edit - just going to wait until something breaks or get MIL. Getting the dealer to diagnose this is going to be a pain!

[rs4 tony]

off topic but 32 degrees is nice! where are you? I miss that weather

[rs4 tony]

never had this. weird. mine go down smooth tho just so you know.

[zachf88]

I'm in Colorado....

[zachf88]

Just realized that the dealer may have topped-off engine oil when the oil level was already at max. Would this cause a rattle/vibration between 1-2k rpm and when not on throttle (rpm's dropping)?

The oil is on the last line of the "m" on the dipstick. What would be the best way to remove just a tad bit of oil?

[rs4 tony]

I personally would let it be. It's only a little but you can do what you want or tell them to correct the error they made, which was top off your oil when it was unnecessary.

[NY07RS4]

You can't "let it be" Too much oil is often worse than too little oil. Easist method would be to get an extraction pump or fluid transfer kit. LEss than $50 at an auto part store. Stick the tube down the dip stick hole and suck out whatever amount necessary to get it back to normal range. Too much oil can be a HUGE problem if left alone. I wouldn't drive it, pick up the fluid extractor with a different car or get a ride from soneone.

[rs4 tony]

True. The seals, rings, gaskets are at risk

[zachf88]

already drove like 250-300 miles like this..... What damage could it have done?


either way, I replaced the oil filter and it's just at max when oil is cold..... But the problem is still there! urgh!