Eliminating the drilled head bolt

[tom upton]

I have always wondered what the heck the engineers were thinking when they drilled out a head bolt to oil the rocker shaft, nessitating lower torque on 1 head bolt??? So came up with this idea. Cant see why it wont work? Going to be a tight fit between fitting and fuel tank, but pretty sure it will clear if I keep the tank hard to the back end battery tray. Would have preferred to keep everthing inside the valve cover, but no easy way to tap into an oil gallery and get it up to the rocker shaft that I could see? Thought I would post a pic in case any one else wants to use head studs, or even just bolt without the hole.

 

[joeysmith]

Can't tell if there is enough meat there but if there is a banjo bolt type setup would give more clearance
Nice out of the box thinking

 

[scootergmc]

You must've talked to my old mechanic friend. I can't remember to which tractor they did that or why, but I believe they needed a field repair and ran a line right up the block and back through the top of the valve cover. Now I'm going to have to check with him for the rest of the story...

 

[I550]

You must've talked to my old mechanic friend. I can't remember to which tractor they did that or why, but I believe they needed a field repair and ran a line right up the block and back through the top of the valve cover. Now I'm going to have to check with him for the rest of the story...

You could have ran it through the breather tube.

 

[scootergmc]

You could have ran it through the breather tube.

So I talked to him. He remembered that early on, the 478 Hercules in the 2050 and 2150 was giving a lot of head gasket/oil problems. He said they would run an oil line on the outside of those engines. He couldn't remember the exact routing on the top end. But they did it on more than a few tractors in the early 70s. He said they eventually got the head gaskets right.

He doesn't remember ever doing it to a Waukesha as shown above, but he understood wanting to eliminate the lower torque bolt, though he said he couldn't remember it ever giving much problems.

 

[tom upton]

I actually thought about running line thru breather tube or even out of valve cover in line with the fitting in rocker shaft but would have required cutting a hole out of valve cover for access to tighten up fitting. I couldnt see how to do it without it looking like a botch job.
Usually when a head gasket starts to leak on the waukeshaws its on the back side were the drilled head bolt is.

 

[GermantownGreen]

I actually thought about running line thru breather tube or even out of valve cover in line with the fitting in rocker shaft but would have required cutting a hole out of valve cover for access to tighten up fitting. I couldnt see how to do it without it looking like a botch job.
Usually when a head gasket starts to leak on the waukeshaws its on the back side were the drilled head bolt is.

I see interesting!!!!!
This is not an oil cooler block, it appears it doesn't have the oil pump shims in the front below the alternator? Share me more if you care to, on message.. Curiosity gets the cat .... GG Wes

 

[MikeO-WI]

The head looks like this may be a gas engine, unless I am missing something. Did they ever use oil cooler blocks for gas engines?

 

[GermantownGreen]

The head looks like this may be a gas engine, unless I am missing something. Did they ever use oil cooler blocks for gas engines?

Looks like you are right ! GG Wes

 

[tom upton]

Yes Gas 310 out of a 1850. This is the first gas Waukeshaw I have had the pleasure of rebuilding. I have several gas Olivers kicking around, but they just keep on running Hope to have this one running within a week or so, but had a bit of an oversight on the clutch I had. New one due in next tuesday so hopefully by next weekend I will post some finished pics.