Mag 20 PO Mod
 

Removed the Mag 20 off my 2072 today to address what I believe to be an oil leak from the oil seal behind the flywheel. Took off the valve covers to take a peek and found a curious PO mod. It appears that silicone was used to form a "mushroom" around the push rod, and also there is a hole in the middle that was completely plugged. The valves are functioning normally(their movement is not hampered). Any idea why that's there? The other side doesn't have them. Should I remove them?:bigthink:

On a separate note, anything else I should consider replacing while the engine is out of the tractor?

http://s12.postimg.org/rrzq0rzml/IMG_0416.jpg

Looks like JB weld. Not sure what the hole is in the center. Possibly just a breather is what I would guess. Maybe Jon can answer that. But that defiantly looks like JB weld hi temp.

It has a soft rubber like consistency, it's more like RTV silicone than JB Weld.

Yes, you need to remove it. PO's :bash2::bash2:

Make sure the drain there is unplugged, and none of that crap plugs it again. It's silicone.

that's messed up

What do you think that PO was trying to accomplish?
Maybe he was trying to quiet the valve train. :biggrin2:

I'd love to know that as well. It would appear that the silicone serves to limit the amount of oil moving in and out of that "chamber". Why, I don't know , but I have a feeling I may find out once I remove all of it and run the engine :biggrin2:

Behind the top valve spring lower right, is that a piece of metal behind there or jb weld? That's the strangest thing I've ever seen! Hope that's a oil seal leaking behind the flywheel and not a hole/crack in the block!

I just went back to look, it must have been a reflection from the flash, there's nothing there, neither JB Weld nor crack. I too am getting concerned, we will find out Tuesday when my flywheel puller arrives.

I hope it's nothing, sure looks like jb weld or something silver in the back.