How long does engine knocking on cold start last?
Lasts maybe 30 seconds after cold start (haven’t tried warm start to know for sure). It is louder on the bottom of the engine compared to the top. Attached audio (from under engine) as requested. I would suggest that you start using 10w30 in the future.
Why do engine make knocking noise when cold started?
It’s like a clacking or grinding sound, almost like if something was touching the fan, and it gradually go away as the engine warms up until it’s running smooth. I think you may be dealing with engine sludge. It blocks passages when oil is cold, but hot oil begins to penetrate through the mess.
What to do about engine ticking noise when cold?
If you determine the engine oil is more than one quart low, the oil viscosity is wrong, or the oil is in poor condition change the oil and filter. Wait until the engine is cold, or at least 2-hours. Then start the engine oil and filter, replace all 8 active fuel management (AFM) valve lifters.
What should you do if your car is knocking on cold start?
Smell the dipstick. If it has the odor of gasoline it would be advisable to not start the engine until it has been drained and refilled with the proper oil and the source of the contamination found and repaired.
Lasts maybe 30 seconds after cold start (haven’t tried warm start to know for sure). It is louder on the bottom of the engine compared to the top. Attached audio (from under engine) as requested. I would suggest that you start using 10w30 in the future.
It’s like a clacking or grinding sound, almost like if something was touching the fan, and it gradually go away as the engine warms up until it’s running smooth. I think you may be dealing with engine sludge. It blocks passages when oil is cold, but hot oil begins to penetrate through the mess.
If you determine the engine oil is more than one quart low, the oil viscosity is wrong, or the oil is in poor condition change the oil and filter. Wait until the engine is cold, or at least 2-hours. Then start the engine oil and filter, replace all 8 active fuel management (AFM) valve lifters.
Smell the dipstick. If it has the odor of gasoline it would be advisable to not start the engine until it has been drained and refilled with the proper oil and the source of the contamination found and repaired.