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BMW 3-Series (E90 E92) Forum
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engine knocking
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07-08-2011, 11:45 PM | #1 |
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engine knocking
my engine has been making a knocking noise lately. it sounds like pin knocks. from my knowledge if your put regular gas in, the engine will make knocking noise in the summer. Does anyone know what this could be??
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07-08-2011, 11:50 PM | #2 |
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Yes ur knocking from the low octane gas ..you answered ur question..use 93..
How many miles do you have?..that could be a sign that u have carbon deposits on ur pistons and intake valves..n its worst in the summer |
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07-09-2011, 12:25 AM | #3 |
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could it be valving tapping? if it was is that a bad thing?
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07-09-2011, 05:45 AM | #4 |
Uhh, Hi =)
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its retarding timing to accommodate the low octane gas, which is very bad for our engine. Better off using 89 and up.
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07-09-2011, 10:00 AM | #5 |
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Put in a bottle of techron and switch to a higher octane gas.
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07-09-2011, 11:47 AM | #6 |
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07-09-2011, 11:48 AM | #7 |
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07-10-2011, 03:00 PM | #8 |
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328? Can't tell on the mobile. If so, and if you're in warranty, get your valve lifters swapped at the dealer. Worked like a charm for me, and I always fill up with v-power
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07-10-2011, 09:07 PM | #9 |
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i have 55,000 miles
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07-12-2011, 08:07 AM | #10 |
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maybe this is the correct section, as my gf's car is making a Knocking or a Rattle sound,
in the pic below, im pointing to the spot where its coming from. its a 06 325i with 72k -sorry for such a huge picture.... i dont know how to make it smaller |
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07-13-2011, 01:13 PM | #11 |
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yea my dad is saying is could be a valve tap now?
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07-13-2011, 01:31 PM | #12 |
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Does the sound go away after you drive it for a while? After they sit for a for a few days, they'll the lifters will start ticking. It should go away after a while.
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07-13-2011, 01:35 PM | #13 |
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yea the car was sitting in the garage for 3 days then it started ticking when i went to start it up, i drove to work 10 minutes away and the car sat again for 6 hours and the ticking was their when i went to start the car again but it hasnt done it lately
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07-13-2011, 01:51 PM | #14 |
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mine will tick sometimes in the morning but after about a 10 min drive it goes away I wouldnt worry to much about it...all gas engines make a tap, click, or a clatter of some sort
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07-13-2011, 01:55 PM | #15 |
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Then it's totally normal. I'm not sure why they do it, but if they sit, they start ticking. Drive it for a few minutes and it goes away.
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--Marcelo
'06 Arctic Metallic 325i | Sport Package | 6MT | Dinan Stage III suspension | Dinan exhaust | 330i manifold swap! Click here! | Active Autowerke tune | 135i Brake Calipers | Deiselboost caliper brackets | E46 M3 front rotors |
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07-13-2011, 11:06 PM | #16 |
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alright guys thanku for the input i appreciate it.
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