Info needed: Strange Sound

[Phil Waterman]

Hi All

Was taking the truck out to play in the snow this morning. HUP started right up after sitting for a month in cold ranging from 0.3/56 F or -17/13 C. Stock 216 cu.in. full rebuild a couple of years ago. Since then every now and then I'll get this sound on starting when the temperature are well below freezing only last a couple of seconds.

This time I had the GoPro Camera with head mount turned on the clip shows the entire start sequence accept that the electric fuel pump was on for about 30 seconds before I hit the starter. That is the full cranking time. You can see my head turn looking for the noise. Sound comes 44 seconds into the video.

Oil pressure had already come up to 25 PSI by the time the sound occurs.

Clutch is disengaged and the trans mission is in neutral.

Any thoughts?

Added a short video of the short ride later.

Cheers Phil


Video.jpg

https://youtu.be/rVMBXy9ImZ8

Video of drive https://youtu.be/kbqcGDFRPVc
Screen Shot 2017-03-15 at 3.50.27 PM.jpg