Question?
 

Loud thicking noise form the engine? What might it be?

Could be a variety of things. Ticking valves is the first thing that comes to mind.

probably the oil pump

Have you run lower octane gas recently? That can cause knocking in vehicles designed for 91 octane + like ours.

aren't the Xs protected by anti-knocking technology? or is it model and year specific?

Nope....will bring it in tomorrow to have it looked at....will let you all know. Lucky its still under warranty.

The X just returned after 5 days at the shop.....exhaust side cyl #1 collasped....replased crankcase vent valve, replaced both intake and exhaust cams, cam carrier and hydraulic lifters.

Lucky me all under warranty.

Good lord, that's a new one on the board I think.

How many miles and what year?

You mean the cylinder in the block collapsed, or part of the cam? Did they say what they thought caused it?
Yowzers! Sounds expensive. Glad you didn't have to pay for it.

must be the hydraulic lifter that collapsed

2003 around 38000 miles....now the brakes are feeling funny...like slight humming when braking! Grrrrr....one after another...

Can you scan the ticket on that and post it, please?