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Rust Monster strikes! Patch panels. More questions '38 Model 41


Shaggy

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Hi group. Me again.

My '38 Model 41 is running now. Still trying to get that choke working on that Stromberg. <img src="http://forums.aaca.org/images/graemlins/grin.gif" alt="" />

After pulling the seats and carpet, I found the usual rusted out floor. Swiss Cheese, just short of Fred Flintstone action.

After Googling myself silly, I'm still empty handed. Can I assume that I'm on my own as to fabricating new floors, or is there anyone out there making nicely formed floor patch panels, like for later cars?

I'm basically looking at replacing all the flat parts out to the rockers, front and back.

I'm also looking for a heavy duty air cleaner as I live in an extremely dusty place, plus a headlight bucket. (One's rotted out)

Any pointers from the collective would be greatly appreciated.

Attached is a photo of the old girl. <img src="http://forums.aaca.org/images/graemlins/laugh.gif" alt="" />

Shag

Kittitas, WA

post-48075-143137907189_thumb.jpg

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I ended up fabricating my own patch panels for my 38-48, but there may be something out there.

Do you have the Stromberg AAV1, or a later retrofit? Mine is a later one, I think its a Stromberg AAV167, which may have been used to replace the Marvel? carbs (I guess they were unsatisfactory).

Bottom line - the AAV1 has a really complex choke, while the AAV167 has a more modern, simpler type.

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Thanks for the response.

I was figuring on making my own floors, but was holding out hoping for a more sanitary solution.

That choke is a head scratcher all right. I'm still studying the service manual. I believe it has the AAV1 carb, with the vacuum starter enable (which works fine) integrated with the choke. Please see the attached and advise?

Shag

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That's the original, and it's a beauty! I pulled one just like it off of a parts car and have torn it down. Only problem with mine is that the throttle shaft is seized up and I damaged it trying to get it out. Plus a bunch of other stuff is shot, but it has been fun trying to piece it back together.

If you pull your carb, you will find the choke asssembly separates into about 3 main pieces. There are two vacuum pistons and a bunch of linkage to be cleaned up. Once that all operates smoothly, I think you will be in good shape. Flush it out good with WD40 and see what good things happen.

By the way, one advantage of keeping the original is the air cleaner will still fit. Mine has a later air cleaner as well and when I purchased what looks like the correct one, it wouldn't fit over my more modern choke.

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I'm hoping to find a complete air cleaner. I just have the silencer portion and lack the element, lid and wing nut. Guess I'll be watching ebay. <img src="http://forums.aaca.org/images/graemlins/smile.gif" alt="" />

Just got done going thru my carb and choke. No kit, but just cleaning all the shellac out. What a mess!!

The throttle body bores were carboned and rusty. I sat the lower section in Stoddard until things softened a bit, then took my Eastwood carburetor cleaning toys to it. Got the carbon out, but the rust was sticking pretty well. I then took the stinky, but effective PB Blaster (NAPA) to the rust and dried it with air after a few minutes. All the rust turned bright orange, which made it a fairly easy task to pick the little cruddy bits from the cast iron bore without damaging it any further. Had to use the cheaters to see what I was doing. (Had LASIK last January)

The upper body had shellac plugging every port. Some air and fuel was getting thru, but not near enough. I could tell it was lean because 3 fingers on top the carb made it run much better when the engine was warm. She's clean now by golly. Those 2 big plugs are a pain to get loose!

The problem with the choke was evident when I went to reassemble it. Some dope had jammed the flexible shaft in the choke unit 90 degrees out. I simply washed the dickens out of it and blew it dry with air and put it back together. Manual warns against lubricating it, though with todays hi temp lubes like some teflons, I imagine a drop on the ball bearing on top wouldn't hurt.

With the carb assembled, I held a lighter beneath the bimetal coil and the choke began to open after a few moments. Glory be!

Now to put it back on the car and see how bad I've screwed things up. <img src="http://forums.aaca.org/images/graemlins/grin.gif" alt="" />

Best regards from Central WA.

Shag

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Follow up.

Not as bad as before, but still seems lean. Runs rougher'n a cob. <img src="http://forums.aaca.org/images/graemlins/confused.gif" alt="" /> Haven't found any vacuum leaks either. (Though I didn't check the advance pot) I put a rag in the silencer to add a little resistance to fatten it up a bit and it's a lot happier. I'll know more tomorrow when I put the vacuum gauge on and look at it again.

Choke seems to take forever to come completely off, but does eventually.

I'm at the mercy of whoever put the ol girl together before me. Valves seem quiet. The stock gauge doesn't seem to show much oil pressure which concerns me a tad. I need to put a confirmed gauge on to know for sure, as the stocker's pushing 70 years old and is likely hard of hearing. <img src="http://forums.aaca.org/images/graemlins/tongue.gif" alt="" />

Tomorrow I pull the plugs and have a look to see if any cylinders are being bad. Then a thorough inspection of the ignition components.

Hittin the sack.

Shag

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Guest imported_Thriller

Shag - I just wanted to let you know I am really enjoying this thread. I wish I could do the same amount of tinkering with my cars, but the new garage doesn't have a roof yet....

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Glad you get a kick out of it.

Discovered the vacuum advance unit is NFG today. This explains the 15" of vacuum, due to the leak as well as no advance at idle. Got a wiggle on the vacuum gauge I think is ignition related. New wires, plugs, cap and rotor tomorrow will tell. Replaced the points and it made a *huge* diff.

The car spent several years near salt water. (Puget Sound) and all electrical components are pretty well corroded. Looking more and more like a replacement wire harness is in the future too.

Believe me, I'm having a ton of fun working on this thing. Gotta love state-of-the-art circa 1938! <img src="http://forums.aaca.org/images/graemlins/grin.gif" alt="" />

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