compression test or leak-down test.
take them to a machine shop
THE ONLY WAY TO TELL IF THE CYLINDER HEADS ARE BAD IS BY REMOVING AND INSPECTING THEM.(NO ONE IS THAT GOOD AS TO BE ABLE TO TELL WITH OUT LOOKING) THE NORMAL PROBLEMS THAT YOU GET THAT ARE CYLINDER HEAD RELATED ARE NOT ALWAYS DUE TO A BAD CYLINDER HEAD.
Yes. I have a bad cylinder in the engine of my Saturn Outlook and it was detected by the check engine soon light.
you probably have a bad gasket on one of the heads or a cracked head like in a water jacket next to a piston wall. check the compression on each cylinder and they should all be with in a 15 lbs range or closer that will at least tell you which cylinder is leaking
putting 305 heads on a 350 will work.you have to chamfer the edges on the combustion chambers because the 305 has a smaller bore.If you leave the sharp edges you will have bad engine knocking,probably causing damage.You will probably increase compression ratio by about a point or so doing this swap also.The 305 has smaller valves and passages which is good for torque,but engine will probably not make good power above 5000 rpm.This engine would probably do well in a pickup truck,or daily driver worried more about good gas mileage instead of performance.350 heads will not work on 305 though,305 bore too small for big valves.
Valve guides and/or valve seals can be worn. Allows oil to get into the combustion chamber.Oil consumption and smoking are signs of either bad piston rings or bad valve guides/valve seals.A compression check on each cylinder can help determine which.
After you have located the clutch slave cylinder, have someone depress the clutch pedal. You should see the piston of the slave cylinder extend somewhat. If it does not, either the slave cylinder is bad, or the master cylinder, or, there is not enough brake fluid in the system for it to operate properly. Check the level in the master cylinder. If the slave cylinder is leaking profusely, it is probably bad.
You light the pilot. if it will not stay lit,the thermocouple is bad.
the modulator is part of the transmission, more than likely you have a problem with timing. check your base timing, firing order, check your advance.
Warped or cracked. A machine shop can check this condition for you, it may not be visible to the naked eye.
A check engine flashing indicates an engine cylinder misfire
Check engine light comes on, mileage drops, may end up toasting a cylinder coil which is a cylinder misfire or flashing check engine light.