69 800A PCV and vacuum wipers

[Scooter]

Ok, this one has me a little baffled. Here in my cave helping out a friend with his recently purchased baby Scout. Over all this is a real clean well maintained "barn find". As I was learning him some IH tech advice with the basics with some of the normal gasket and fluid changes, I got a little stumped on a minor po setup.

304 motor attached to manual trans. Granted, I'm aware that the IH 4 poppers have a mechanical fuel pump with the vacuum pump attached. But I didn't see one on this 304. The last 69 800 I worked on had an actual pcv valve mounted on the valley pan, along with spark arrester on valve cover. Which is not currently installed on this sweet little ride.
I had the service manual in hand last night that he just purchase from IHPA, but I was fairly whooped from work and we didn't have much time for going through the manual. I'm in search of other ideas and/or opinions on top of his service manual that he took with him.

Any thoughts?

 

[Robert Kenney]

That pcv setup looks stock on the rear of the valley pan.
The one valve cover with the chrome cap is not. At least not for a 68-69 304. You should have an oil fill tube coming off of the front cover, with a 1/4 turn sealed cap on it. Just below the cap on the fill tube you should have a 3/8-1/2 nipple. That nipple takes a host that connects to the inner area of the air filter housing.

I thought the spark arrestor application was later on. Like 70 or 71 along with the dry element air filters.

 

[Scooter]

Hmmm....

The oil filler cap didn't seem stock to me either. As we all know how a po things go, we just don't exactly know what they were thinking. Here's a shot of a doa defunct 304 that I pulled out of another 69 800. It sure looks to me like a pcv valve mounted on the valley pan. Maybe I'm wrong for calling it a spark arrester that's screwed into the valve cover.

From what I gather, this motor was the original motor to that particular 69, before I pulled it. With the suttle difference between these two motor is what kinda throws me off. Neither of the two 69's that I have worked on had the vacuum pump attached to the fuel pump, like I have seen for new replacement pumps. Is the setup in my first posted photo normal for how the vacuum line is hooked up for the wipers? There is a little vacuum motorized unit mounted on left inner fender just under the master cylinder

 

[FDChappie]

Perhaps the engineers at IH figured that an 800 with a 304 in it was so over powered that you'd never get the vacuum low enough to affect the wipers?

 

[Robert Kenney]

hmmm....

The oil filler cap didn't seem stock to me either. As we all know how a po things go, we just don't exactly know what they were thinking. Here's a shot of a doa defunct 304 that I pulled out of another 69 800. It sure looks to me like a pcv valve mounted on the valley pan. Maybe I'm wrong for calling it a spark arrester that's screwed into the valve cover.

Yes that is a pcv in the valley pan and yes that is a spark arrestor in the vc.
But the photos in the op show the older sparkplug type of pcv valve. Those usually did not have the spark arrestor in the return air vent like the doa 304.

Going down the line I know that cali had more stringent emission requirements then say a fed spec light truck. That May be the reason for the difference you are seeing between 800's.

Also gross weight and truck vs passenger car classification probably had an influence on emissions regs.
Just guessing but the 304 on the op photos is probably a 304a not an e like the doa 304. The e304 would be the flat top emissions engine.

 

[Scooter]

Makes sense. Op photo was throwing me off in comparison to the dead 304 that I pulled out of another 69 800 and the ones out of the bigger Scout II cousins.

Am I safe to assume that the black hose off the brass fitting in op photo, is for wipers? Traced it to going through the firewall somewhere under the dash. Or would that be for something else? I really don't want to get into tearing things apart just yet, especially since it's not mine. And all were doing at the moment is basic maintenance of fluid changes and oil pan gasket replacement. Plus he hasn't had it long enough to actually drive it to see how it handles. Main concern was that he was informed of possible water tube being cracked. We'll find out either tonight or tomorrow. Here's an exterior shot of this baby Scout from op:

 

[Robert Kenney]

I'd say that wipers is a likely end point for that black hose too.

 

[Greg R]

Scooter that "older" pcv in the op picture is a take apart kind. You can unscrew the body and clean out the carbon and sludge off the pintle. I've done that also on the '67 t'all and the '51 l and it helps keep the oil leakage down.

 

[Scooter]

Thanks greg. We'll take a look into that and add it to the list of things to do for later date.

We just finished up with new fuel line and filter, along with new plugs, wires, new thermostat & gaskets. And the one thing that got us started on this, was a po claim of a cracked water tube off the water pump. Half way filled the radiator when we saw the left tube pissing out a pin hole. Luckily new tubes are on hand.

But ran into a more pressing matter with the carb. Which my gut thinks a poor rebuild. Was running Rich. Old spark plugs proved it with good wiff of raw fuel, among other issues with fuel over flowing out the top of carb and through side of bowl