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1951 Pontiac Chieftain


PhilA

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The mechanism had a lot of slack in. Problem was, the threaded rod wasn't holding straight. So, I cut up a spring from a door latch.

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Fitted it in place and now it holds the thing in line.

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Adjusted the rest of the linkage up, added a couple more springs and now it's a lot better.

 

Idle is better also after I pushed all the wires back into the distributor cap fully...

 

Phil

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Still got a really bad misfire at light to medium throttle. Feels fuelly but not too sure- stamping my foot down generates all the right actions though, and at light throttle it runs really quite well.

Things are out of adjustment, troubleshooting old fuel and crappy gaskets right now which really doesn't help.

 

--Phil

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This afternoon I set about looking at the ignition system. I checked none of the spark wires were high resistance or open circuit.

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They all came back good.

 

For giggles, with everything plugged in right I decided to see if adjusting the timing would help.

 

That'll be a yes then

New distributor cap time

 

 

Phil

 

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Nice day today and I'm stuck at home so I decided that the car needed a bit of TLC in the looks department. Started with 2000 grit and soap and water, started to wet-flat the paint.

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Cutting compound making a noticeable difference.

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Polish and wax.

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Comes up well enough still.

 

Phil

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Had a go at making the color better to go over the stone chips. It's moderate, but I'm going to try sand back the paint I added so only the divot if the scratch has touch up paint in.

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Still drying in this picture, the match isn't bad bad. 

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Tidied the back of the car up also.

It's a bit "lipstick on a pig" but it'll hold things over until the grinder comes out. That happens once everything else is done mechanically.

Phil

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The plik plik plik and misfire was recreated- I think I have a couple valves that are taking to sticking open.

 

Off with its head at the weekend if time allows. I may even pull it back out again to do this because access is not great. I think I'll try dig up my valve spring compressor, pull all the valves, check theyr'e all straight and clean, clean the guides and reassemble. Exhaust valve 8 has stuck open in the past.

 

--Phil

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55 minutes ago, Zelandeth said:

Possible that a decent run might resolve this without having to reduce the engine to a pile of bits again?

Can't remember how far into the valvegear you went last time...

I didn't, I pulled the head off and decoked the top surface.

 

Head off is easy, valves out moderately so but access sucks. 

 

Phil

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1 hour ago, PhilA said:

I didn't, I pulled the head off and decoked the top surface.

 

Head off is easy, valves out moderately so but access sucks. 

 

Phil

The curse of the sidevalve engine!

Shame you've got to mess around with it further, but sure you'll get there...at least once you've got it all sorted it should hopefully "just work" for a while.

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2 hours ago, Zelandeth said:

The curse of the sidevalve engine!

Shame you've got to mess around with it further, but sure you'll get there...at least once you've got it all sorted it should hopefully "just work" for a while.

I'm trusting the work done on this engine less and less.

Hopefully a clean and adjust will remedy it (probably will end up being horrifically expensive, like the simple re-seal of the gearbox ended up being).

 

Phil

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