Whats this noise

[pontiacgta2002]

I'm getting a clicking noise after the motor is up to operating tempature. Here is a clip of it. Its most noticable at the beging of the clip. its a rythmic sound ticking/clicking.

https://plus.google.com/u/0/114044022533244965428#114044022533244965428/posts

1999 GMC Yukon, new motor from pace part number 12530283

specs:
This engine consists of:

1986-2000 style block, 1pc rear seal 4 bolt mains -(No mechanical Fuel Pump Provision)
Nodular Iron Crankshaft
Powdered Metal Connecting Rods
Hypereutectic Pistons
9.4:1 Compression Ratio
Roller Camshaft-
Specs-
Intake Lift- .414"
Exhaust Lift-.428"
Intake Duration @.050"- 191
Exhaust Duration @ .050-196
Lobe Centerline-111
Vortec Cylinder Heads- 64cc,1.94" intake,1.50" exhaust
Includes: Oil Pan, Timing Cover,Valve Covers and Harmonic Balancer

 

[SunlitComet]

If it is on the sides I lean toward exhaust leaks. If coming from the rear I lean towards flexplate/converter bolts.did sound like the bolts when camera was on left side. But sounded like exhaust when on the right side.