P220 Oil seeping.

[Gadget 37]

Let me start by saying sorry there is no photo.

I have a small (if there is such a thing) oil leak on my 220. It is on the right hand side of the engine, just above the bearing plate. There is a circular disc about 1 1/2 in diameter that is weeping oil. If it were automotive, I would call it a freeze plug. The parts breakdown simply says "Plug" Anyway, it looks like the PO may have applied some sealer at one point (Reddish brown RVT???). I thought that was a crappy fix and then I was looking at rebuilt short-blocks and it looks like they come that way (with sealer, not with leaks) 

Anyone care to tell me what this part actually is and what it does AND if there is in fact a sealer that is the proper fix.

Its only a small amount of oil, but I hate things that leak oil (no more old British cars for me) and worse yet, when the oil hits the airflow, it puts a fine coating on the cylinder head, which makes chaff start to collect more easily, and from what I have read, that's a no-no.

So is this something I should worry about or just put my big-boy pants on and stop whining?

 

[sorekiwi 761]

That plug is at the end of the camshaft.  It is a reasonably common oil leak on Onans.

 

Sorry I cant tell you how to fix it, the only one I have ever replaced was while the engine was apart.  You probably could pull the old one out by screwing a self tapping screw into the middle and pulling it out.  

 

I am sure that there are others on here who have done it.

[cleat 7,263]

That is the welch plug covering the end of the camshaft.

 

I had a bad leak on the 520HC there. The plug was loose.

 

I lifted it out with a magnet, cleaned the area real well, applied a small bead of sealer to the ridge where the plug sits and installed a new plug.

 

A hit in the center with a large punch and hammer and the new plug is nice and tight.

 

Wait a little while for the sealant to cure then start the engine and no leaks.

 

[Phatboy 565]

You can buy a pair of pliers that are designed to take out freeze out plugs in cars and take out the welch plug ,,, when you squeze them the ends go out instead of in,,and they have teeth on the ouside of them,, and are only a cpl of bucks,,, dont put a srew in there if you get a piece of metal in the engine you will regret not spendinng a cpl of bucks on the proper tool,,, easy fix in 5 minites or less..

[gwest_ca-(File Mod) 11,510]

Those plugs are cupped and just slightly smaller than the hole they are sized to fit. The idea is to flatten the cup a bit which makes the OD of the plug larger. We always held a ball peen hammer on the plug and hit the 1st hammer with a second hammer to flatten the plug. The large hammer head centered on the plug seems to be more effective. This way you can't miss and damage the block/hole. The best solution is a new plug with a thin strip of sealer on the edge.

 

Garry

[scoob8000 29]

7 hours ago, Phatboy said:

You can buy a pair of pliers that are designed to take out freeze out plugs in cars and take out the welch plug ,,, when you squeze them the ends go out instead of in,,and they have teeth on the ouside of them,, and are only a cpl of bucks,,, dont put a srew in there if you get a piece of metal in the engine you will regret not spendinng a cpl of bucks on the proper tool,,, easy fix in 5 minites or less..

 

What are they called, or have a link?    I just did a quick search but just keep coming up with tools to install them.

 

Mine is leaking too and I'm thinking of replacing it too.

 

 

[gwest_ca-(File Mod) 11,510]

There are 2 different types

http://www.hpaulin.com/Catalogue/EP_410_NEW_2010.pdf

 

Garry

[Gadget 37]

Thanks all,

So this area is not under pressure? That is to say that it simply contains oil being "splashed" to lubricate the cam-shaft?

Thanks again.

[cleat 7,263]

Not that end of the cam. I believe the gear end of the camshaft may be supplied oil.