Stuck exhaust valve
Posted January 20, 2011 - 05:56 PM
Posted January 20, 2011 - 06:31 PM
- Bolens 1000 said thank you
Posted January 20, 2011 - 06:46 PM
- Bolens 1000 and caseguy have said thanks
Posted January 20, 2011 - 07:01 PM
Thanks for adding that Dan! Not sure where my head was, but that's the way to go!
Just a little addition, if you have a brass or aluminum pin to use, place it in the center of the valve to ensure you don't accidentally hit the outer parts of the valve, which could bend the stem. As light as a tap as it will be, I just use a steel pin, but for advising others, I stick with recommending a soft metal drift pin.
Posted January 20, 2011 - 07:51 PM
Posted January 20, 2011 - 08:39 PM
It may sound a little violent, But you'll want to use the spray lubricant of your choice (Aerokroil, P.B. Blaster, WD40, etc...) and lube up the valve stem liberally. Make sure that the cam lobe for the exhaust valve is 180 degrees away from the valve stem (i.e. a gap between the lobe and the stem), then use the smallest hammer you have, a brass one is really nice because it wont mar the valve head, and tap lightly until it begins to move. Once it seats, you should be able to rotate he cam lobe back up to open it again, then repeat until it moves freely. This may be all you have to do depending on if there's a lot of slop in the guide after you get it freed up. If there is, then you'll have to replace the valve guide and possibly the valve as well. P. S., if it wont move with gentle tapping, don't get carried away or you'll bend the vale stem and that wouldn't be good at all. This is just my $.02. It has worked for me in the past. There may be more suggestions to come too. Hope this helps.
Done the same thing a couple of times, used a brass drift though.
Posted January 20, 2011 - 08:51 PM