2004 crf 450 r atifreeze in the oil and put new water pump and all that in it and they say it needs head gasket but if that dont work does that mean the blocks cracked

Do a compression test on the cylinder

Put the oil in the inner chamber.

there is really only two ways for oil to enter the oil (1) is the oil and water seals fitted on the water pump impellor or (2) the other is head gasket leak
the most common on MX bikes is the oil and water seal at the impellor (water pump)
if your not to mechanical minded then both of these issues you would be best to take to dealer to rectify as they bit tricky to do with out experience.
if you are mechanical minded then either problem is fairly cheap to fix about $25 for the oil water seals or about $70 for the head gasket
let me know if you want me to elaborate on either issue
good luck regards Jamie

You need to find it, and not run it, as coolant in the oil destroys things fast. Pressure test your coolant system to find a leak. You might be looking at head gasket, or even water pump seal area to start.

that is not an overfill hole it is a seal and bearing drain hole, this means the shaft seal has failed, u will need to replace the water pump

Water pump oil seal is not a possible cause. Even if the water and oil seal were so worn out that the coolant passed through both seals the weep hole in the crankcase cover would have to be completely stopped up and sealed. In that case it would leak into the transmission oil not the engine oil. The coolant leak would likely be in the cylinder/head area.

It seems the head gasket has blown thus the water /coolant in to the engine.. you will have to replace the head gasket and flush out the engine.
Hope this helps!

HI,,, YOUR WATER PUMP DRIVE SHAFT HAS WARN A GROOVE WHERE THE WATER PUMP OIL SEAL SITS....SO YOU NEED A NEW WATER PUMP SHAFT GASKETS AND SEALS..MAYBE NEW SHAFT BEARINGS...$100-180 TO GET FIXED..THE WATER NECK FROM YOUR CYLINDER HEAD NEEDS A NEW O'RING.. SIMPLE FIX UP