Originally Posted by gforceman
Does a leaking manifold. Leak only when hot. Or cold or both. ?
When cold its very loud tick. For example if you start your truck and it ticks loud for about 20-30 seconds then gets quiet or normal sounding. But once you start driving or putting the engine under a load, you'll hear it tick.
A way to check is when the engine is warmed up, roll windows down, put truck in drive, hold a foot on the break and push the gas pedal too, not too much to smoke the tires! You should hear the tick when the gas pedal is pushed. It should tick with rpms. If you simply put it in neutral or park and rev it and listen for the tick it won't be noticeable. Only under a load
Mine would be soo annoying with my passenger window down driving along a building or wall. The tick would echo off the wall and sound very loud.