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Registered User
Join Date: Nov 2015
Location: dubai
Posts: 38
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Engine knocking sound
The problem with my car never stops. I got my car to start however, it has developed this knocking sound as soon as i start it everytime and continues to stay.. when i accelerate the engine on idle the sound seems to go away but on low rpm the aound is continuously there. What am i looking into now? Or where ahould i begin?
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12-08-2016, 07:32 AM
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cycling has-been
Join Date: Sep 2004
Location: Jersey Shore
Posts: 7,238
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Porsche?
Reset the timing. If okay, run some SeaFoam through the combustion chambers/intake system. Bill K
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73 911T MFI, 76 912E, 77 Turbo Carrera |
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12-08-2016, 07:47 AM
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Registered
Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
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chain tensioner has collapsed.
not a fan of putting a liquid into a running engine, liquids do not compress. too much and you risk pulling a head stud or worse.
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86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
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12-08-2016, 09:11 AM
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cycling has-been
Join Date: Sep 2004
Location: Jersey Shore
Posts: 7,238
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Can I change my answer?
I agree with chain tensioners. Timing and dieseling would make it hard to start. Also, the noise is probably hidden by the exhaust note at speed, but still present.
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73 911T MFI, 76 912E, 77 Turbo Carrera |
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12-08-2016, 12:06 PM
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Member 911 Anonymous
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OP, post a video, it will help us determine a bit better our answers, hopefully that is
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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12-08-2016, 03:27 PM
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Registered User
Join Date: Nov 2015
Location: dubai
Posts: 38
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I will try to post a video on saturday. The sound does feel like it is coming from the left side of the engine when standing and looking into the engine. And feel heavy vibration on the chain housing case when i touch the pretruding bolts on the exterior of the housing. Also oddly the cylinder 1 and 5 dont seem to work just did a simple test by pulling each wire out of the spark plug socket and the engine shows change in idle speed. However 1 and 5 bring no changes. I changed the spark plugs and no change.
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12-08-2016, 07:48 PM
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Member 911 Anonymous
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Hmmm.
Can you verify spark is coming out of those wires? Get a 2 foot long wire and wrap a spare spark plug at the thread, plug into the wire and the other end of wire to a ground. Have a helper start it and observe for spark. DO not hold the wire, place it safely where you can see the spark to confirm spark then move to the next suspect. If you can, disconnect fuel pump via fuse. If no spark, verify OHMs of the wires.
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC Last edited by DRACO A5OG; 12-08-2016 at 08:17 PM.. |
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12-08-2016, 08:12 PM
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Marble Grey
