What Engine Do I Have
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Freshman User
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What Engine Do I Have
I have a 1973 F250 4x4
How do I know if its a 360 or 390?
I see the number 352 on the front of the Block
I just purchased it he said he thought it to be a 390 but how do I know for sure?
Thanks
Tim
How do I know if its a 360 or 390?
I see the number 352 on the front of the Block
I just purchased it he said he thought it to be a 390 but how do I know for sure?
Thanks
Tim
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 83
From: NorCal
I quote myself:
Engine at TDC.
Spark plugs at #1 and #7 removed. Why #1 and #7? The crank journals are 180° our of phase.....
Measure #1 and mark....use the valve cover rail for reference on each side.
Measure #7 and mark.
Measure difference:
+/- 3.50 inches... = 360 cubes
If it's +/- 3.75 inches, then it's a 390.
Spark plugs at #1 and #7 removed. Why #1 and #7? The crank journals are 180° our of phase.....
Measure #1 and mark....use the valve cover rail for reference on each side.
Measure #7 and mark.
Measure difference:
+/- 3.50 inches... = 360 cubes
If it's +/- 3.75 inches, then it's a 390.
Thread Starter
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Freshman User
Joined: Aug 2013
Posts: 47
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Dang was hoping for something easier however nice info thanks!
It is original motor so probably 360 all the supporting parts the same between 360 and 390?
Distributor
Water pump
Fuel pump intake manifold
Valve covers etc....?
It is original motor so probably 360 all the supporting parts the same between 360 and 390?
Distributor
Water pump
Fuel pump intake manifold
Valve covers etc....?
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