You don't want to start my Chevrolet Malibu Mod.81

Hello someone can support me. I have a Chevrolet Malibu Mod. 81 6 online cylinders and does not want to start me and to change carburetor already put it on time and I don't want to start. The water pump was damaged about three months and had a small warming. The already Czech mechanic all of the above and the conclusion that I arrive is that the board of the head that is jumping the explosion between cylinder 4 and 5, I have already tried to agree with the mechanic so that I will change the joint is shown but it has been bad to support me someone telling me how this procedure is carried out a little mechanics. I will thank you for a prompt response.

It is cencillo with some knowledge, if the Marcala distribution is tuning so that the point is not lost, it takes the strap loose everything that aya that releases and releases the butt bolts that are under the multiple change the packaging lings well the surface and put the new Czech that is not crooked the cylinder head and put it, give the torque corresponding to the pores in the correct order.