If you are even considering pulling the heads use your solution ATF/Diesel on the exhaust manifold bolts. The valve cover gaskets are always shot anyway. With the valve covers removed you can also check to make sure if all the valves are moving, they may stick in the up position, if they are really dry. Once it is free you want to turn the engine over by hand a couple times, if it stops you most likely have found a stuck valve or something. I start with a plastic hammer, brass would be a good choice, an aluminum drift also works. When you tap on the valves you get a thud they are free, if it is a high pitch ting they are not. Good time to pour some penetrant on the valve guides and down the intake. Ia-k is correct I have not been working on my "V" engines lately. So the first step I would suggest is pull the valve covers and hit each valve to make sure a stuck valve isn't the cause of your problem. Could have save a lot of time and effort if I would have checked this out first. Took them off and sure enough I had a bent push rod. My dad (after the fact) said first thing I should have done was take the valve covers off hit each rocker arm to make sure none of the valves were stuck. Sparkplugs back in, some gas down the carb, and it started but ran on 7 cylinders. Couple of smacks with a sledge hammer and it spun over. No luck, so made a contraption that slid under the car and engaged the teeth of the ring gear. I had a stuck engine (327 Chevy) and tried several ways of breaking it loose including soaking the cylinders and trying to "rock" the engine back and forth with a socket/breaker bar, and bumping the starter. Fill it 'till it comes out of the spark plug holes and screw the sparkplugs back in a couple of turns to prevent evaporation. I agree with the ATF/Diesel/Acetone mix although Kroil Oil would be the best, but as pointed out expensive.īeing a V8 (I assume) a few tablespoons down the cylinder isn't going to be much help as will puddle on the bottom of the cylinder wall, a couple of tablespoons would work on a inline/L head though.
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