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Daves55Sedan · 08-06-2018, 10:55 PM

Ummm...if the engine isn't totally gunked up inside, I would not run the engine with the valve cover off. It will look like a waterfall of oil sprayed all over everything, particularly exhaust manifold (smoke, smelly oil burning).
I would NOT attempt to remove a valve spring with the head installed on the engine. If the spring is removed and the valve is not stuck, the valve will slide down inside the cylinder and it will be impaled by the piston possibly causing damage.
Furthermore, I don't know of a way to make removal of the spring possible when the head is still mounted on the engine. To my knowledge, the head must be removed so that a valve spring compressor can be employed. It is not possible to use it when the head is mounted on the engine.

08-06-2018, 10:55 PM	#45
Daves55Sedan Senior Member Join Date: May 2010 Location: Granite City, Illinois Posts: 3,008	Re: Pulling my hair out over this misfire Ummm...if the engine isn't totally gunked up inside, I would not run the engine with the valve cover off. It will look like a waterfall of oil sprayed all over everything, particularly exhaust manifold (smoke, smelly oil burning). I would NOT attempt to remove a valve spring with the head installed on the engine. If the spring is removed and the valve is not stuck, the valve will slide down inside the cylinder and it will be impaled by the piston possibly causing damage. Furthermore, I don't know of a way to make removal of the spring possible when the head is still mounted on the engine. To my knowledge, the head must be removed so that a valve spring compressor can be employed. It is not possible to use it when the head is mounted on the engine.