How to fix a cracked head

Is it over heating? If there is oil in with the coolent, It could be a cracked head gasket on the engine, Or evan a crack internally in the engine block,

Generally speaking, if you have engine oil in the cooling system, you have a leak somewhere in the engine, which could be a head gasket.
Is there any sign of coolant in the engine oil ?

when the water mixes with the oil , if you don't fix it right away , you can warp the head or crack the head or engine block.

sounds like a blown head gasket

if there is no leak that you can see by the naked eye then there is a leak insid the motor most likely a cracked head gasket causing your coolent to mix into your oil.

sounds if you are getting coolent or water into the oil. you should have it taking to a shop for repair.

u say only somtimes smokes out the tail pipe it could be the oil cooler that is the problem,the oil cooler cools the oil using coolant and when the seals perish the oil and coolant mix,is it over heating?

don't run the engine with coolant in the oil the sugar content in most anti freexes will crystalize the rod and main bearings causing severe internal damage to the crankshaft! pull the spark plugs one at a time! to see which one has water on them and then remove the cylinderhead on that side and replace the head gasket and check for a crack around the exhaust valves but tis better when you tear a engine down! too! replace both!! head gaskets!

Check for coolant in the oil. The oil will look like chocolate milk. After it's sat overnight you can also try loosening your oil drain plug until fluid comes out. See if it looks like chocolate milk or is just straight coolant. Check your spark plugs. Pull them out of the cylinder head and check for white corrosion or actual coolant in chambers or threads. You can also do a block test (rent the block tester at Autozone for $25.00- return when you're done and you get the $25.00 back) the block test fluid is $8.99. Follow the directions and if your test fluid turns green or yellow you have combustion/emission gases in the coolant. This can be caused by a cracked block/ cylinder head/ blown head gasket. You can also disconnect one head's spark plugs and test that cylinder then the other to see if only one is causing the problem. Hope this helps. If you're losing coolant, it's probably not your water pump. A lot of times if a head gasket fails, the head (usually made from Aluminum) will crack or warp.

You Most Likely Need A New Head Gasket.