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Originally Posted by racechaser
I have an 89 f250 4x4 project truck I'm fixing up. The owner told me it had a 302 in it when I bought it. While having the intake off I noticed my rocker arms weren't all lifting the same( I know the intakes and exhuast have different lifts). While looking around I just noticed a small sticker for belt routing that says 5.8L.
So I see that most all parts on upper engine are the same so I haven't run into any differences in locating used parts for the upper engine. I now want to replace the damaged cam to see if my cylinder pressures get more equal so I can decide whether it needs a rebuild or not.
So How can I tell if I have a 5.0L or 5.8L without pulling a head to check the stroke length. The bore is the same if I'm correct, so that is the only way to tell that I know of.
I was hoping the # of bolts on oil pan were different or maybe a casting # somewhere.
I really need help because the cams are diffeent between the two.
Scott
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The firing order is different. 5.0 firing order is 1-5-4-2-6-3-7-8, 5.8 firing order is 1-3-7-2-6-5-4-8. Follow the spark plug wire from the passenger side front spark plug to the distibutor cap, that is number one. Distributor shaft rotates counterclockwise. Cylinders are numbered from front passenger side 1-2-3-4, driver side from front 5-6-7-8. I believe the 5.8 is also 2 invhes wider at the head spacing, but that in itself won't tell you anything.