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'51 Chieftain - Getting back to it

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Driver's door reassembled completely. Happy with that. 

All the doors now lock so I can secure the car.

Adjusted the starter inhibitor switch, pushing the lever all the way up to the top of N would go off the end of the switch and the starter wouldn't operate unless it was given a slight nudge downwards.


Everything's all boarded up, my brakes may be delayed because of the weather. But, I'm getting there, working through the nitpick list now.



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Okay, so: The List.

Rebuild brakes
Replace rubber fuel lines (*)
Replace intake and exhaust manifold gaskets
Replace heat riser gasket
Windshield defog tube (*)
Refit glove box (defog tube first)
Rewire battery to trunk (*)
Manifold stud (*)
Crank breather tube (*)
Air filter needs oil
Coolant change
Fill screen wash
Oil change
Rear axle oil (*)
Grease everything again (*)

That's everything between now and putting it on the road. There's more, but that's the prep list.


(*) - Item that I don't have in stock

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6 hours ago, Grizz said:

Does the air filter just sit in an oil bath? Or how you go about oiling it? I read an article about a while back but can’t remember 

The Pontiac engine has three air filters, one for the air intake of the carburetor and, two for the crankcase ventilation. They are all cleaned in the same manner. Immersing them completely in solvent, draining and filling the elements and draining again and again until the solvent is clean, then they are drip dried or blown out with compressed air. The air filter housing for the carburetor has a reservoir with oil in it, that housing must also be cleaned and then clean oil filled to the prescribed amount. Before the elements (3) are put back on the engine they should be filled with light weight oil and turned over and drip dried. 

The reason for oiling after cleaning is so that the oil film will cling to the wire mesh inside the filters and dirt in the air coming past will cling to the mesh and prevent it from entering the carburetor or the crankcase.

The crankcase ventilation and filtering is very important. One filter is at the oil fill neck and there is a air scoop built into it to catch air from the engine radiator fan and direct it into the engine. The oil filler tube has a crease in it to match the crease in the filter to index it properly so the crankcase gets air. ( I have seen many Pontiac's where by hook or crook someone has either twisted or installed the filler tube backwards or someone just forced the filter on backwards).

  The other crankcase filter is located on the road draft tube. That filters reason for being there is when the car is turned off say in a dirt parking lot the filter keeps dusty air from going up the road draft tube into the engine. Remember the end of the road draft tube is cut at a angle. It's cut at a angle so that when the car is in forward motion the pipe sticking down in the air stream causes a low pressure suction on the end of the pipe pulling harmful crankcase vapors out of the engine.

This form of crankcase ventilation is called the pressure suction type. Air pressure from the engine fan, and suction from the tube cut at a angle while being drawn through under the car while in motion.


You can just see the scoop on the bottom of the round housing where the air goes into the filter;




This is the exit part of the road draft system with filter,


Notice the tube is cut at a angle for drafting although it is positioned the wrong way see the flow chart below for the proper angle.

Picture 3 of 4



Here is how it works; Note the engine filler tube was later changed from the rt. side to the left for better scavenging the lower crankcase.  

1937 Pontiac High Resolution Stock Photography and Images - Alamy

Edited by Pfeil (see edit history)
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Correct. I need to make an extractor vent tube- I have a new oil filler cap that's not all smashed up. 

I bought an air filter but had to replace the mesh, before the car sees the road the mesh needs oiling and the pan filled. I have yet to finish talking it on and off which, when filled to the marking with oil is potentially quite messy.



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