Front Axle Pumpkin Vent

[dfkrug]

Thats what I thought too. Still, why would oil be coming out of an air breather either? I guess there is a "baffle" in the breather that could deteriorate according the to tech manual. Maybe mine is deteriorated?

Oil can come out of the breather onto your cover if the hose is cracked
and either/or:
> the separator/filter in the cover is not doing its job
> the rings are worn and causing excessive blow-by
> there is too much engine oil in the sump
> the drain-back holes in the head are clogged with sludge

Let's hope your rings are OK.

I had no problem removing my exhaust manifold studs and bolts. I
needed to remove them from the head to have the head hot tanked. You
don't need to remove the manifold at all for what you plan, but if you do,
the steel gasket is reusable. Just take the muffler off the manifold.

This photo is before I put the tank back in, but you can get a clear
view. If you cover the muffler hole like in the photo, you can wash
everything before you remove the valve cover.

 

[arrabil]

Will stainless handle the heat that manifold bolts see?

Never had a problem with it before. But if someone knows different I'm all ears.

Let's hope your rings are OK.

I'm gonna hope for a bad baffle but I suspect its the rings. Under heavy load some white smoke will come out of the exhaust. Like if I'm pushing on the hydro pedal up hill on my fairly steep driveway. Backing off the pedal and reducing speed and load eliminates the smoke. And yes, I understand how the hydro works, its just that I swear I don't think I'm bogging it or working it that hard. But it does. I crawl up the driveway (slowest possible speed achievable with the pedal) to prevent the smoke.

Thats pretty much a give-away of worn rings, no? I didn't know about the breather baffle though and if oil is coming through it, that would also explain the white smoke.

Either way, its why you see me looking for an engine in my sig. I'd rather rebuild one of the bigger ones and drop it in.

 

[dcyrilc]

Will stainless handle the heat that manifold bolts see?

Never had a problem with it before. But if someone knows different I'm all ears.

Nothing that I know of. I was just throwing out the question since I've never seen stainless used for ehaust manifold bolts.

 

[dcyrilc]

This photo is before I put the tank back in, but you can get a clear
view. If you cover the muffler hole like in the photo, you can wash
everything before you remove the valve cover.

Dave. That engine is way too clean to be working on to do a rebuild. How on earth are you supose to get grease all over everything if you clean it like that before starting the work?:laughing:

 

[jd3020u]

My 3720 with 128 hours has some "oil residue" around the breather pipe connection to the valve cover and no hose clamp. Hot oil vapors and dust will make a mess over time regardless of any other conditions present. I will be getting a clamp on mine shortly though

Oil can come out of the breather onto your cover if the hose is cracked
and either/or:
> the separator/filter in the cover is not doing its job
> the rings are worn and causing excessive blow-by
> there is too much engine oil in the sump
> the drain-back holes in the head are clogged with sludge

 

[arrabil]

I was just throwing out the question since I've never seen stainless used for ehaust manifold bolts.

Ah. I use them all the time when I have the manifold off already. They tend to rust-stuck a lot less.

"oil residue"

I got a lot more than residue though. Definitely have to call that a leak. I'm still hoping its the baffle or maybe no o-rings under the bolts or something similar.

 

[dfkrug]

That engine is way too clean to be working on to do a rebuild. How on earth are you supose to get grease all over everything if you clean it like that before starting the work?

As you likely know, that's the engine that I put together in my rebuild,
so I am approaching it here from the other direction.

Anyone needing to get in there for inspection or valve adjustment should
remove the muffler first, make a patch for the hole, then wash everything.
Pressure-wash or otherwise, it will help greatly in the inspection, and it
will help to keep the innards uncontaminated with dirt. It is easy to clean
if you do it BEFORE you open everything up.

 

[arrabil]

I made a new thread on the valve adjustment.