Replacing valve stem seals in 305 H.O. small block chevy from 1986 Monte Carlo SS

I'm putting the original 305HO back in the Monte after taking the ZZ3 out for my Iroc project. This is mainly to make the car mobile but it may end up tagged with this engine for a while. Previous owner reported that this 305 has over 100k miles on it and has been out of the car since 1997. He said it smoked during startup and sure enough the valve stem seals were worn out. Hopefully this will fix the issue.

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Valve seal Replacement
Leaking valve seals cause your engine to smoke when you first start it up, and then it usually runs the rest of the day with no smoke. Usually replacing the valve seals will fix the problem. Here's how to do it. Of course other engines may vary to some degree but the basics are the same.





Replace Valve Seals on 350 Chevrolet Video 9
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2 Minute Valve Spring Removal How To.
I'm in the process of rebuilding a Perkins 4 cylinder 236 cubic inch engne (4-236). I had a 4-248 engine originally but it had a hole in the block so I bought a 4-236. This is the head from the 4-248. The heads are the same so I'm rebuilding both. This is just a quick how to remove the valve springs with a hammer and deep socket. The head will require some cleaning of rusty passages since the Exhaust pipe wasn't blocked from rain and snow. Its a simple procedure and can be done inhouse. Most times you would put a rag in the cumbustion chamber to keep the valves from going down with smack of the hammer but these valves are rust stuck so I didn't use a rag this time. When you put the valves back in you would definitely use the rag method for the valves. Most older engines can be done this way. Chev, Dodge or my favorite Ford can be done this way. I'm not sure about the newer engines but it might be worth a try. This is just my experience with valve spring removal and you can expect similar results with similar head setups. You could also do this method with the head still on the engine as long as you pressurize the cylinder. That would be another howto video that is probably already posted on Youtube. I'll be posting a video of inhouse valve spring installation when I'm ready to put this head back together.





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