We were working on my dad's 2007 Express van, tracing an A/C line leak. I noticed a distnct loud rapid ticking; it seemed to come from near the front of the valve cover on the left side. We were busy and I did not get a stethoscope out to localize it further. I made a video of it but I can't get it to link or embed correctly here.
Here is a youtube video that is identical to me and more distinct than my video since it's in an open engine bay on a Silverado and not the semi-covered van's bay:
https://www.youtube.com/watch?v=vyhl7N6WVbI
It does not sound like an exhaust leak to me but rather too mechanical. Safe to assume it is a lifter on likely cyl 1 or 3? The van has about 146k on it with strong maintenance history. It got conventional 5w-30 on schedule at Jiffy Lube 2007 to 2015, then it got Castrol Edge 5w-30 and is the current fill, 2,300mi on fill since last September. They are driving less frequently and short trips (both retired) so a synthetic switch seemed in order. I do not recall the sound at the last oil change last year this time and I have not been under the hood since then. I doubt I could have missed it last spring/summer. My dad is hard of hearing and cannot hear it.
Anyone know this issue on these engines and have a recommendation? I was thinking of going to a 10w-30 FS HM oil for a higher ZDDP and HTHS, these do not seem to be strengths of the Castrol now that I look at the numbers.
Here is a youtube video that is identical to me and more distinct than my video since it's in an open engine bay on a Silverado and not the semi-covered van's bay:
https://www.youtube.com/watch?v=vyhl7N6WVbI
It does not sound like an exhaust leak to me but rather too mechanical. Safe to assume it is a lifter on likely cyl 1 or 3? The van has about 146k on it with strong maintenance history. It got conventional 5w-30 on schedule at Jiffy Lube 2007 to 2015, then it got Castrol Edge 5w-30 and is the current fill, 2,300mi on fill since last September. They are driving less frequently and short trips (both retired) so a synthetic switch seemed in order. I do not recall the sound at the last oil change last year this time and I have not been under the hood since then. I doubt I could have missed it last spring/summer. My dad is hard of hearing and cannot hear it.
Anyone know this issue on these engines and have a recommendation? I was thinking of going to a 10w-30 FS HM oil for a higher ZDDP and HTHS, these do not seem to be strengths of the Castrol now that I look at the numbers.
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