"Tapping" engine & maintenance

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Spaniarduk
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"Tapping" engine & maintenance

Post by Spaniarduk » Fri Jan 05, 2018 10:59 pm

Mine also sounds a bit 'clicky' in general. This is something that always obsessed me and worried me even though the car has only 27k miles. The other day i started it and stuck my ear right in on and around the engine block. I think i managed to locate the clicks and ticks from the admission side but no specifoc spot in particular. As if it came from difgerent spots, but all the same. I suddenly realised that my ear was hovering over the injectors! The electomagnets opening and closing each injectors. Something impossible to follow when you realise that at 1100 rpm (idle speed when cold) the injectors are firing in total 3300 times a minute! For peace of mind I also opened the oil filler cap. That allowed me to listen in for other ticks. Nothing at all. Smooth as cream. Also I stuck my ear onto the VANOS. It sounded a little rough for a about 15 seconds. I guess until oil finally got to the inners of it. It got noticeable quieter, not that it was alarmingly loud. Im only thankful me and my OCD-ness never got that stethoscope for Xmas :rofl:

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mr wilks
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"Tapping" engine & maintenance

Post by mr wilks » Fri Jan 05, 2018 11:10 pm

ShineyT wrote:
Fri Jan 05, 2018 7:33 pm
Well that sounds reassuring! I have owned the car 4 years and honestly never noticed it previously.

Oil change was about 2k miles/6 months ago, valve clearance was 8k miles/18 months @ inspection service.
18 months since last oil change ? You really need to stand next to it when cold & warm to comment but If it were mine I’d be changing the oil for some quality stuff (Millers CFS 10w 60 my only choice) .
Who did the valve check service 8k ago ? Trusted or maybe not ?
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dannytheduck1985
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"Tapping" engine & maintenance

Post by dannytheduck1985 » Fri Jan 05, 2018 11:41 pm

Does it get louder when you rev the engine?.
On idle that sounds like mine did.

Put a clip on of the sound when you rev. If it’s the bottom end bearings, the knock sound will make you cringe
84’ E28 Alpina B9
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ShineyT
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"Tapping" engine & maintenance

Post by ShineyT » Fri Jan 05, 2018 11:55 pm

mr wilks wrote:
Fri Jan 05, 2018 11:10 pm
ShineyT wrote:
Fri Jan 05, 2018 7:33 pm
Well that sounds reassuring! I have owned the car 4 years and honestly never noticed it previously.

Oil change was about 2k miles/6 months ago, valve clearance was 8k miles/18 months @ inspection service.
18 months since last oil change ? You really need to stand next to it when cold & warm to comment but If it were mine I’d be changing the oil for some quality stuff (Millers CFS 10w 60 my only choice) .
Who did the valve check service 8k ago ? Trusted or maybe not ?
Last oil change 6 months ago/ 2k miles, last valve clearance check was 18 months. Done by a very reputable bmw specialist (Forza GB).

Will probably get an oil change done just because though. The car doesn’t get many miles.
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ShineyT
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"Tapping" engine & maintenance

Post by ShineyT » Fri Jan 05, 2018 11:56 pm

dannytheduck1985 wrote:
Fri Jan 05, 2018 11:41 pm
Does it get louder when you rev the engine?.
On idle that sounds like mine did.

Put a clip on of the sound when you rev. If it’s the bottom end bearings, the knock sound will make you cringe
It goes away when not at idle actually, can’t hear anything untoward at all when moving up the revs.

Will try and get a video of some rev movement tomorrow though for clarity.
2006/56 Black Sapphire Z4MC. Imola Red leather, Carbon effect dash, DSP stereo, Nav, RPi back boxes, stubby, OEM Strutbrace and many more bits planned. Can't see it ever going anywhere!

dannytheduck1985
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"Tapping" engine & maintenance

Post by dannytheduck1985 » Sat Jan 06, 2018 12:01 am

ShineyT wrote:
Fri Jan 05, 2018 11:56 pm
dannytheduck1985 wrote:
Fri Jan 05, 2018 11:41 pm
Does it get louder when you rev the engine?.
On idle that sounds like mine did.

Put a clip on of the sound when you rev. If it’s the bottom end bearings, the knock sound will make you cringe
It goes away when not at idle actually, can’t hear anything untoward at all when moving up the revs.

Will try and get a video of some rev movement tomorrow though for clarity.
That’s a good sign :thumbsup:
84’ E28 Alpina B9
83’ VW B2 Passat CL
90’ Mercedes 300E-24
90’ Vauxhall Carlton GSI 3000 24V manual
85’ Opel Ascona Cabriolet

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