Join Date: Aug 1998
Location: Waldorf Md. USA
Re: Best Stuff for Stuck Intake Valve?
Take the valve cover off and spray a bunch or carb cleaner through the valve spring towards the valve. If you can take the rocker off, do that and smack the top of the valve a few times with a plastic hammer too. You can try an oil additive, but I have a hard time beleiving that enough of it will get into the valve stem to do any good.
You did not mention what type of engine, or if it has been sitting for a long time, or why you think a valve is stuck but .... if it is something that just happened, there is a good chance that the stem is galled up too and the only long term fix will be removing the head and properly repairing it.
Advanced Automotive Machine
1971 Chevelle "Heavy Chevy" original owner