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Unusual engine vibration after oil change

9609 Views 8 Replies 5 Participants Last post by  LaxDfns15
Hey guys, new to the board here, but have seen LOTS of excellent information here.

I've been doing a search on here and can't quite find a problem like I currently have. Monday afternoon I took my '06 Titan (~170k miles) in for an oil change at a local quick oil change type place. I've had them done there before, so didn't think anything of it. When I leave the place, I notice an odd vibration between 1500 to ~2100 RPM. It's not a violent vibration, but definitely noticeable enough to have me concerned. I haven't been back to the oil change place as I haven't been able to discern what exactly the problem is. It has the vibration while in park if I rev the engine through that RPM range, so I have ruled out U-Joints. I haven't had the time to do a thorough inspection, but I have checked out the fan clutch and looked at the belt, and both appear to be fine. There isn't any slop in the clutch and all blades are there and look ok. I don't see (with my naked eye anyway) anything wrong with the harmonic balancer. I figured if any of the plugs / coils were damaged / unplugged that I would have a code showing up for a misfire. I do have 4 days off so I can actually pull the metal cover from the bottom and get a better look at the balancer.

Anyone have any ideas where to start first or have an idea what could be going on? Any suggestions would be hugely appreciated!
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I hadn't checked the oil yet. I guess I am jumping to bigger things instead of starting with the simple things. Doh! It does feel a little different as far as power delivery. It's not quite as smooth as it was. Then again, I have been going really easy on it, not knowing if it is mechanical or electrical. Guess I'll be checking that before I leave work this afternoon. Thanks for thinking of the simple stuff man.

I originally assumed that perhaps a plug got fouled somehow and it would burn off and be back to normal. Guess that's not the case.
I'll check that when I get out of here. I can't really point a finger at the place, as I don't have any solid proof, and the fact that it is highly coincidental. I did see there is what appears to be an abnormally small filter, which from what I have read on this forum, is normal. I do find the oil filter location is wierd, along with the starter location. Learning more and more about this truck year after year.
Well, the oil level appears to be a little overfilled. Christmas day will probably be my day to crawl over it and dig further into it.
My apologies for the lengthy delay in getting back to this post.

Turns out the damned fools at the "quick change" place put in (estimating) between 8 to 9 quarts of oil. When I changed the oil, the 10 quart container was almost full. After cussing for a bit, I changed the filter and put ~6.5 quarts back in. Runs like a sewing machine now. I'm thoroughly surprised I hadn't blown out any seals, or anything worse. The only casualty seems to be the oil pressure sending unit. It's not easy to get to (without the right combo wrench anyway), so it will have to wait for the upcoming oil change.

In short, change your own oil because you never know what's going to happen at some overpriced oil change shack.
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