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Old 12-31-2020, 01:00 AM   #1
Aarongriffey
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Default 300 c.i.d. Valve clearance and ignition timing?

I can not find specs for 1956 F100 pickup with the 300 straight 6 motor.
Can somebody help me out?
I Need to adjust the long overdue valve clearance and set the timing.
I gapped the points at .020”.
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Old 12-31-2020, 06:44 AM   #2
darrell
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

its no wonder you cant as this engine came out in 65.if its original it should be a 223.points are .025 valves .020
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Old 12-31-2020, 10:24 AM   #3
Ole Don
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

A 300 six has a three grove crankshaft damper. A 240 looks the same but has one groove. I don't remember the 223, but I do remember they go like stink.
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Old 12-31-2020, 11:25 AM   #4
dmsfrr
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

Probably need to positively ID the engine before you can go too much further with a tuneup.
But I'd only be guessing where to start looking...

There should be a casting number on the block up until the mid 60's, or a metal ID tag after that.
It will help if you can find it.

http://techlib.fordsix.com/fordsix-t...dentification/

.

Last edited by dmsfrr; 12-31-2020 at 11:43 AM.
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Old 12-31-2020, 11:50 AM   #5
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

The original 223 will have two nuts holding on the valve cover on top of it. Later 6 cyls. will have small bolts around the gasket area of the valve cover.

Sal
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Old 12-31-2020, 08:06 PM   #6
Aarongriffey
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

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This engine has eight bolts holding the valve cover but a single groove front pulley.
I find no tag anyplace on the engine.
I am familiar with the falcon engine and the 200. I ain’t one of them
I have owned and rebuilt a couple them.
I bought it as a 300, it has lots of power and is a real gas hog.
I just can’t find any specs even if it isn’t a 300.
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Old 12-31-2020, 08:18 PM   #7
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

I think I made a big mistake on the year.
I now believe it’s a ‘65 not ‘56.
When I got the motor it had an alternator, still has, the exhaust manifold was cracked, I took the manifolds from a ‘72 that I was junking out.
The previous owner of the ‘72 said it was a 240. So that would tell us it sure isn’t a 223.
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Old 12-31-2020, 09:16 PM   #8
darrell
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

these engines have hydraulic lifters 3/4 of a turn after contact for lifters.
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Old 12-31-2020, 11:57 PM   #9
Aarongriffey
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

Thanks Darrell.
I kinda figured it might have hydraulic lifters.
I set the timing to what seems to run best and start without kicking back on th starter.
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Old 01-01-2021, 12:18 AM   #10
Aarongriffey
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

Ok, I figured it out.
A ‘56 Ford takes a cartridge type oil filter.
Mine takes a spin on so it is not a ‘56 but a 65. It’s been a long time since the seller told me what year this engine is.
Thanks to everybody that helped straighten me out.
I have been running it in a ‘48 Nash Ambassador with an all synchro three speed out of an ecoline and a Jeep 3.08:1 rear end. Same wheel bolt pattern as the Nash.
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Old 01-01-2021, 10:05 AM   #11
54vicky
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

not true with all as a spin on adapter was added to a lot.as mentioned some numbers would help to narrow down
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Old 01-01-2021, 12:04 PM   #12
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

Hi Aaron,

I replied to your message with some 240 six tune up specs I found (passenger car).
Should be close enough for truck too.

Sal
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Old 01-01-2021, 02:22 PM   #13
Aarongriffey
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

I thought of that too 54Vick, but this one does not have an oil filter adapter.
The oil filter screws on directly to the block.
I had a 1967 3/4 ton pickup with 300 engine some 40 years ago that I replaced a cracked piston in but I don’t remember any of the tune-up specks. I just remember how it pulled my 23 foot trailer house like it wasn’t even there.
I will go with what Sal posted and thank everybody that took time to post on this thread.
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Old 01-03-2021, 03:49 PM   #14
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

215/223/262 have the manifolds on the left (driver's) side while the 240/300 have the manifolds on the right side and distributor on the left (driver's) side.
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Old 01-06-2021, 10:02 PM   #15
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Default Re: 300 c.i.d. Valve clearance and ignition timing?

Also; I understand that some 240's had a smaller combustion chamber. Newc
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