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TO 35 timing update sorta


 
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William Fissell
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PostPosted: Mon Jan 01, 2018 3:00 pm    Post subject: TO 35 timing update sorta Reply to specific post Reply with quote

Hi,

I rebuilt the distributor today and it is now gorgeous.

It is timed to 6 BTDC as confirmed by my timing light

Does not run. I do however get a ton of fire out the cardburetor, and when cranking I actually now get each cylinder backfiring through the carb in sequence
pow-pow-pow-pow. Should not be happening unless intake valve still open. Intake should long ago be shut by 6 BTDC. If there was just a stuck valve I
wouldn't get 95 PSI compression on every cylinder.

Since the original problem was supposedly screeching thought to be a destroyed governorI am now (as in next weekend now) going to pull the timing cover as
I wonder if in a previous life someone got the cam shaft wrong - off by a tooth or two.

I will update next weekend. Thanks for all the help and if this sparks haha new ideas please say.

Billl
 
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PackardV8
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PostPosted: Mon Jan 01, 2018 3:09 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

"Rebuilt distributor". Meaning what??? Did replace the bushing??? If bushing is worn it will cause unpredictable resylts.
 
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William Fissell
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PostPosted: Mon Jan 01, 2018 3:12 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

@PackardV8: Thats a very reasonable question. No I did not replace the bushing; I freed up the frozen timing advance weights and the frozen advance shaft that was stuck to the shaft. There was negligible play side to side when I reinserted the distributor shaft in the casting.

BTW I didnt know packard made a V8; I only thought inline 8s...
 
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PackardV8
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PostPosted: Mon Jan 01, 2018 3:44 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

Packard made V8 1955 and 1956.
 
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William Fissell
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PostPosted: Mon Jan 01, 2018 3:48 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

Cool! I used to work in a building in Cleveland that used ot be a Packard dealership. Still had Packard carved in the stone.
 
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Dieseltech
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PostPosted: Mon Jan 01, 2018 4:38 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

Just a thought, when the points "break" to fire is the rotor and wire aligned for the number one cylinder? Could be simple as all four wires are incorrectly placed in the cap.
 
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William Fissell
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PostPosted: Mon Jan 01, 2018 5:19 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

Yes, thought of that and trouble shooted (spelling?) that a lot, even pulled the dizzy and tried it forward a tooth and back a tooth checked roto position at TDC and plug wire to #1 cylinder and that the rotor lined up with the contacts in the cap.
 
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Inno
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PostPosted: Mon Jan 01, 2018 5:20 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

Quick thought, you probably already are aware but the distributor rotates counter clockwise, make sure your plug wires reflect this on the dist. cap.
 
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William Fissell
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PostPosted: Mon Jan 01, 2018 5:41 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

Yup!

checked that. I had it wrong the first time :)

I am aware that the odds that I screwed something up are way higher than the odds that someone else did ;)

BUT I see nice fat blue spark, I timed it by hand as per instructions in the previous set of posts, and my timing light tells me 6 BTDC.

So... not sure how I am getting this backfiring as reliably as I am. I guess I can crank to tdc and then apply compressed air to the spark plug holes and confirm
that the valves are shut on #1.
 
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Steve@Advance
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PostPosted: Mon Jan 01, 2018 6:16 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

I don't think cam timing is the issue.

If the cam were off, it would not have 95 lb compression.

An easy way to tell, pull the coil wire, hold your palm tightly over the air in of the carb, crank the engine through. You should get a strong, steady vacuum against your hand, and your hand wet with gas.

If the popping stops with the coil wire out, the problem is ignition timing. Have you double checked that the distributor not 180* out?

If the popping continues with the coil wire out, then I would look for a valve problem, possibly (a long shot) restricted exhaust.

Just to be sure not to overlook the obvious, the fuel is gasoline, right? Had someone on here a while back, fought for weeks to get his tractor running, finally discovered someone had put diesel in his gas can! LOL
 
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William Fissell
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PostPosted: Mon Jan 01, 2018 6:39 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

You know thats not a bad thought that the timing is 180 out. I had thought about that but not very clearly. Crank turns twice for every one revolution of the rotor, doesnt it. yup I bet thats it.
 
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Tom H.
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PostPosted: Tue Jan 02, 2018 1:01 am    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

I also think you are 180 degrees out. Pull all the plugs, easier to turn over then, put your thumb on the number 1 plug hole and have someone slowly crank it over by hand. Compression has a lot more push than the exhaust stroke. So when up on compression set your distributor on number one plug wire. I usually set 1 at the 10:30 position. Look in your timing hole and it should be close to DC or 0
 
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William Fissell
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PostPosted: Thu Jan 04, 2018 11:14 am    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

you are correct. I was 180 out. runs now. Now to figure out the awful noise.
 
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Jerry/MT
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PostPosted: Fri Jan 05, 2018 8:38 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

The timing mark appears in the hole once per revolution but the spark plug only fires on every other revolution following the compression stroke. You are probably I rev out of time.
 
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cdmn
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PostPosted: Sat Jan 06, 2018 4:56 pm    Post subject: Re: TO 35 timing update sorta Reply to specific post Reply with quote

I have two 1955 Hudsons with Packard V8s and automatics. I believe Nashes did too, and some Studebakers. Some years earlier, White trucks used Packard Sixes.
 
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