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1951 Pontiac Chieftain


PhilA

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On 6/28/2020 at 2:25 PM, PhilA said:

No, it's neither. Missed my old blue one.

Someone spent on the options, thinking it's a Texas car (front plate holder, radio was set to both kinds of music- country and western). 

So, it's got the 8 speed automatic. I don't mind- it can change gear a damned sight faster than I can... 

 

Phil

FIFY

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Tidied up the wiring for the oil pressure warning light switch, tightened the oil pressure gauge union because it was leaking and added a return spring to the throttle shaft of the carburetor to get it to sit fully home because the linkage going over the engine has a little much slack in.

 

20200710_175024.thumb.jpg.db68654c1b016c908ac6c50cfb879a38.jpg

Engine got a bit warm. Just how warm was a bit worrying but it didn't smell all that bad.

 

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IR thermometer showed that the whole engine and radiator were at 170 degrees while the needle showed 220. I need to adjust that, then.

 

Phil

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3 hours ago, hairnet said:

170 is cool if its F? (no pun intended)

aint so bad (rocky III)

 

Yup. It should have a 180F thermostat in (nothing fitted right now) and it's a 7lb pressure system so it'll not boil until about 223F.

170 is cool enough for sitting idling when it's 90F out.

 

Phil

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20200713_195858.thumb.jpg.b27fb2bb024ac4f03fc99cce1a86b2c6.jpg

Liberated the driver's front sash channel tonight.

 

20200713_200118.thumb.jpg.391027e1964e613113b023cc3ce802c5.jpg

Is that household window putty I spy? Yes it is. Front glass channel is missing, the glad was done up into the metal fixings and broke from there. Marvellous. Now I gotta find one of those to fit, new glass and probably a new top/rear glass channel.

 

The rubber doohickey that grabs the glass into the sash channel is available new.

 

Phil

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On 7/10/2020 at 7:55 PM, PhilA said:

20200710_175024.thumb.jpg.db68654c1b016c908ac6c50cfb879a38.jpg

I built a doohickey to go on the back of the gauge.

20200717_123313.thumb.jpg.3050e2e18b95d475187e2dd2f27cf96f.jpg

This can push about an Amp and will just hook into the original wiring.

It's adjustable from 3 to 14 volts.

20200717_123323.thumb.jpg.42e08ed69096aeb229b3dba9ed89cd4a.jpg

Black wire will ground to the instrument cluster on a screw (it's got a fork on the end), one hole for the screw on the gauge, one that I need to get a screw and nut to go through and fix the power supply wire that's currently powering the gauge.

 

I'll play about with fitting that this afternoon

 

Phil

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5 hours ago, hairnet said:

oh to have a brain [/scarecrow]

 

 

They make it easy by putting a bunch of stuff in one little piece. The heart of it is this device, the LM317.

20200717_101300.thumb.jpg.69b69ccfbea62acf965bf536dabba631.jpg

Those three legs are connected to a few external pieces:

Circuit-diagram-of-LM317-variable-voltage-regulator-circuit_0.thumb.png.14139cebd772ed4062a2585ca23f022f.png

But they did a lot of work to make it simple, because the LM317 has this inside:

fbd_snvsay0.thumb.gif.fc343fdbcd0d5b563b0c1ca8f75c3227.gif

It's a wonderfully versatile, reliable and clever integrated circuit.

 

Phil

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3 hours ago, PhilA said:

They make it easy by putting a bunch of stuff in one little piece. The heart of it is this device, the LM317.

20200717_101300.thumb.jpg.69b69ccfbea62acf965bf536dabba631.jpg

Those three legs are connected to a few external pieces:

Circuit-diagram-of-LM317-variable-voltage-regulator-circuit_0.thumb.png.14139cebd772ed4062a2585ca23f022f.png

But they did a lot of work to make it simple, because the LM317 has this inside:

fbd_snvsay0.thumb.gif.fc343fdbcd0d5b563b0c1ca8f75c3227.gif

It's a wonderfully versatile, reliable and clever integrated circuit.

 

Phil

Yeah but WHAT DOES IT DO?!?! Apart from magic, as that’s the only reasonable explanation. 

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20200718_130515.thumb.jpg.3aee51e02340860c7f11495c78642f56.jpg

This afternoon I did this.

 

20200718_150850.thumb.jpg.b3629cceba9e9b38486c9a218fc55092.jpg

Because the temperature gauge was getting stuck in the middle like that, and wasn't moving smoothly. It needed a thump on the dash to make move. The oil pressure gauge was reading just above zero also when disconnected and that irked me so I adjusted that.

 

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Little bit of light oil on the moving parts.

 

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Turns out the gauge was good when removed but once tightened up into the bucket was twisting a tiny amount and making the needle bind. With it tightened down I carefully bent the armature and now it moves nicely. It's lost the gooey damping oil effect to a degree but I'll buy a slightly wobbly gauge over one that doesn't move.

 

20200718_160018_1.gif.d961a578757fd3e0c9ee524d381fed76.gif

Better. Doesn't get stuck any more.

 

Phil

 

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17 minutes ago, hairnet said:

dw will be looking for a triangle of doom there :D

is a doohickey related to a doobry or a doodah?? :D

 

Yes, loosely related to a whatchamacallit.

 

Also you cannot have a triangle of doom with only one wiper. The worst is inadequately swept area .

 

Phil

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1 hour ago, PhilA said:

Turns out the gauge was good when removed but once tightened up into the bucket was twisting a tiny amount and making the needle bind. With it tightened down I carefully bent the armature and now it moves nicely. It's lost the gooey damping oil effect to a degree but I'll buy a slightly wobbly gauge over one that doesn't move.

You need some fancy unguent from these chaps to restore the non-wobbliness.

Doohickeys attach to the whojamaflip, which is retained by the frendle pins.

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3 hours ago, somewhatfoolish said:

You need some fancy unguent from these chaps to restore the non-wobbliness.

I left just enough and watered it down a little to bring it back to the correct consistency. It had dried up a little over the years (some sort of silicone based gunge, added a little oil and it beaded on it, so went find the stuff in the garage for the windows and that mixed).

Good site though, so noted for future use, thanks!

 

Phil

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