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239 Ignition Timing
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Senior User
Joined: Nov 2008
Posts: 220
Likes: 1
From: Southeast MN
239 Ignition Timing
Hi,
I am trying to get my 239 OHV up and running. But the mechanic that is going to help me doesn't know anything about Y blocks.
He needs to know the following:
1) Cylinder locations 1-8
2) Cylinder locations on Distributor cap
3) Distirbutor rotation (CW or CCW)
4) Tune Up Specs (points gap, dwell gap, spark plug gap ect.)
And anything else that you think is important that I forgot.
Thank You,
I am trying to get my 239 OHV up and running. But the mechanic that is going to help me doesn't know anything about Y blocks.
He needs to know the following:
1) Cylinder locations 1-8
2) Cylinder locations on Distributor cap
3) Distirbutor rotation (CW or CCW)
4) Tune Up Specs (points gap, dwell gap, spark plug gap ect.)
And anything else that you think is important that I forgot.
Thank You,
Elder User
Joined: Sep 2012
Posts: 776
Likes: 3
From: Philly, PA USA
These links I think are what you are looking for:
Flathead Tuneup Specifications for 1949-53 V8 (239 & 255)
https://www.ford-trucks.com/forums/1...ng-issues.html
http://www.ford-y-block.com/assemblyerrors.htm -more for rebuilds but good to know info
1950 Ford 239 Flathead V8 Engine Specs
ignition timing and vac advance 239 flathead - Hot Rod Forum : Hotrodders Bulletin Board
hope these help, good luck!
Flathead Tuneup Specifications for 1949-53 V8 (239 & 255)
https://www.ford-trucks.com/forums/1...ng-issues.html
http://www.ford-y-block.com/assemblyerrors.htm -more for rebuilds but good to know info
1950 Ford 239 Flathead V8 Engine Specs
ignition timing and vac advance 239 flathead - Hot Rod Forum : Hotrodders Bulletin Board
hope these help, good luck!
Cargo Master
Joined: Apr 2003
Posts: 2,389
Likes: 58
Sounds like a good mechanic, and I'm not being sarcastic. It is good that he asks these questions and does not make assumptions.
Cylinder numbering.
So we are on the same page, the water pump is the front, the flywheel is the back, the distributor is the right, the oil pump is the left.
On the right bank, numbered from front to back, 1, 2, 3, 4
On the left bank, numbered from front to back, 5, 6, 7, 8.
Firing order 1-5-4-8-6-3-7-2
The distributor cap probably has a 1 near one of the terminals and that is where #1 should be. From there, follow the firing order, counterclockwise.
I don't remember the tune up specs, but I believe that is typical of any points equipped v8.
For stock cams, valve clearance, .019". About 1/4 turn of the adjuster screw loose from 0 clearance will get you real close.
Cylinder numbering.
So we are on the same page, the water pump is the front, the flywheel is the back, the distributor is the right, the oil pump is the left.
On the right bank, numbered from front to back, 1, 2, 3, 4
On the left bank, numbered from front to back, 5, 6, 7, 8.
Firing order 1-5-4-8-6-3-7-2
The distributor cap probably has a 1 near one of the terminals and that is where #1 should be. From there, follow the firing order, counterclockwise.
I don't remember the tune up specs, but I believe that is typical of any points equipped v8.
For stock cams, valve clearance, .019". About 1/4 turn of the adjuster screw loose from 0 clearance will get you real close.
Lead Driver
Joined: Nov 2002
Posts: 9,680
Likes: 1,251
From: Jefferson City, MO
Here is an image that might be helpful.
It was from this thread: https://www.ford-trucks.com/forums/1...lp-please.html
I'm currently putting together my 239 Y-Block. I'm an amateur so I'm going very slow and asking lots of questions. My thread is in my signature.
Here are the distributor specs from the shop manual:
It was from this thread: https://www.ford-trucks.com/forums/1...lp-please.html
I'm currently putting together my 239 Y-Block. I'm an amateur so I'm going very slow and asking lots of questions. My thread is in my signature.
Here are the distributor specs from the shop manual:
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Thread Starter
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Senior User
Joined: Nov 2008
Posts: 220
Likes: 1
From: Southeast MN
Here is an image that might be helpful.
It was from this thread: https://www.ford-trucks.com/forums/1...lp-please.html
I'm currently putting together my 239 Y-Block. I'm an amateur so I'm going very slow and asking lots of questions. My thread is in my signature.
Here are the distributor specs from the shop manual:
It was from this thread: https://www.ford-trucks.com/forums/1...lp-please.html
I'm currently putting together my 239 Y-Block. I'm an amateur so I'm going very slow and asking lots of questions. My thread is in my signature.
Here are the distributor specs from the shop manual:
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Fleet Owner
Joined: Dec 2000
Posts: 25,378
Likes: 5,387
From: Central PA
I would recommend getting a shop manual... That is where Harrier got his page of info...
Harrier is rebuilding a '55 239... make sure the specs are the same for a 58, if that is what you are working on.
Harrier is rebuilding a '55 239... make sure the specs are the same for a 58, if that is what you are working on.
Elder User
Joined: Sep 2012
Posts: 776
Likes: 3
From: Philly, PA USA
It's mentioned at the top of the image for 54-59 Ford and 55-57 T-bird
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