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Opel Astra G (1.6L, 16V) Z16XE 2003 - Identifying Engine Ticking/Knocking Sound Near Oil Drain Plug

asterix27 7338 10
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What could be causing a ticking/knocking sound coming from the bottom of a 2003 Opel Astra G 1.6 16V Z16XE engine near the oil drain plug, especially when cold and quieter when warm?

The sound is most likely from mechanical clearance in the bottom end, such as the piston/piston pin, connecting rod, or incorrectly selected crank bearings, because it is louder cold and fades as the engine warms up [#16525042] [#16525100] The suggested checks were oil pressure, whether the oil pan is deformed, and whether the crankshaft splash guard or oil pickup is touching the sump [#16525100] [#16525104] One later comment also pointed to the possibility that the engine simply has a persistent knock typical of older engines, but the problem was never resolved [#20244883] [#20244308]
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  • #1 16525031
    asterix27
    Level 19  
    Posts: 496
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    Hello,

    Car Opel Astra G, 1.6, 16V, Z16XE, 2003.

    What can it tick / tick like in the attached movie? A video recorded around the oil drain plug. You can't hear this chirping at the top, only at the bottom. The engine is after renovation due to taking oil: bushings, rings, regeneration of the head. The oil now burns about 100 ml / 10,000 km. The noise is the same both before and after renovation.

    https://drive.google.com/open?id=0BzSc6Ucz1hFcQkdHY085WVBJa2s
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  • #2 16525042
    panstalin2
    Level 20  
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    A similar sound as if there was a crank in the piston on the pin, loose or wrongly selected crank shells.
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  • #3 16525078
    asterix27
    Level 19  
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    As I mentioned before and after the renovation, the same. If there was a backlash somewhere, they would notice. The renovation was done by a company that specializes in Opel and has already made several dozen of such engines. I don't think they did something wrong or did it. The more that the sound disappears the hotter the engine. In the cold it is most audible. I am still waiting for any suggestions.
  • #4 16525100
    panstalin2
    Level 20  
    Posts: 435
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    You did not write that they replaced the pistons, only the rings. When it gets hot, the slack will be erased.

    What is the oil pressure on a cold engine with idle and warm ones?

    Oil pan not crumpled? The splash guard on the crankshaft is not touching the bowl, or the dragon?
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  • #5 16525104
    asterix27
    Level 19  
    Posts: 496
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    1. Idle, engine warm: 0.12 MPa
    2. Increased speed: 0.4 MPa

    I did not measure it in the cold.

    The oil pan is not crumpled.
  • #6 20243786
    Bartii21
    Level 5  
    Posts: 36
    Rate: 1
    And how did the topic end?
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  • #7 20244308
    asterix27
    Level 19  
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    It has not been resolved to this day.
  • #8 20244613
    Bartii21
    Level 5  
    Posts: 36
    Rate: 1
    So he still drives with such a fault now yes?
  • #9 20244744
    asterix27
    Level 19  
    Posts: 496
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    Rate: 36
    Yes, it still drives.
  • #10 20244823
    Bartii21
    Level 5  
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    It was the same for me
    The same renovation, everything as you wrote and you probably had to replace the piston and possibly the sleeves
    Everyone says that the crowd on the turn is knocking
  • #11 20244883
    asterix27
    Level 19  
    Posts: 496
    Help: 2
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    Hard to say. I have already done tens of thousands of kilometers. If it were something with a piston, it would have fallen apart a long time ago. This is what it is with good old 20-year-old engines, knocking, knocking and not wanting to fall apart.
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Topic summary

LABEL_AI_GENERATED
The discussion revolves around a ticking or knocking sound emanating from a 2003 Opel Astra G (1.6L, 16V, Z16XE) near the oil drain plug. The owner reports that the noise persists even after a comprehensive engine renovation, which included replacing bushings, rings, and regenerating the head. The sound is more pronounced when the engine is cold and diminishes as it warms up. Responses suggest potential issues with crankshaft components, oil pressure, and the possibility of needing piston replacement. Despite the ongoing noise, the vehicle remains operational without significant performance issues.
AI summary based on the discussion. May contain errors.
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