while warming the TY up in cold weather only for the first 3 mins i hear a knock . but then completely goes away when the engine heats up. Any ideas? :-? motor was upgraded, eagle rods, srp pistons and only 7000 miles on a new rebuild
Sounds like your clearences are set up a little loose. In the cold weather all metal parts contract. When you start up in cold weather, the clearences are a little loose from the metal contracting. When the motor heats up all the metal parts expand to their normal size. This could be a problem in the long haul. When cold you could be damaging the bearings if the clearance thing is the problem.
Another problem could be too heavy weight oil for the weather conditions causing "dry startup" Very bad for the bearings.
And yet another could be a little piston to bore slap while cold. (another metal contracting issue)
There are alot of things that can be the cause. I would seriously investigate the cause to prevent any costly damage.