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Thread: Engine rattle at low revs

  1. #1
    Join Date
    Jan 2019
    Location
    Middlesbrough uk
    Posts
    2
    My Cars
    BMW 318i e90

    Engine rattle at low revs

    Hello peeps, first time here and I am hoping this place answers all my queries on a regular basis. I have a bit of knowledge on the workings of engines but a free second opinion is always welcome.

    i have a 56 plate 318i and at low revs, it rattles, as if ur in the wrong gear.
    I am thinking some kind of timing chain slackness. It’s only got 85,000 on the clock so naturally the chains coming up to ring replaced.

    i also have an oil leak but I don’t think that’s causing the noise, until I can find the source of the leak I am making sure it’s got plenty in.

    its my first bmw and wouldn’t part with the car as I fooking love it but I just want it to run straight.

    i did change the rocker cover gasket thinking that was the source of the leak as their was oil fumes coming into the car but it’s still pissing out

    many thanks...

  2. #2
    Join Date
    Oct 2009
    Location
    Bellevue, WA
    Posts
    2,403
    My Cars
    335d, 328xd (had 330xi)
    No. You're lugging the engine, which is causing pre-ignition knock. Change down a couple gears - anything below about 2,000 rpm is generally too low.

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