239 piston rings
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Mountain Pass
Joined: Oct 2017
Posts: 121
Likes: 20
From: Northwest PA (Erie)
239 piston rings
Hi all - I am in the middle of “refreshing” the 239 (EBV) out of my ‘55 F-100. It’s pretty much disassembled and ready to head off to the machine shop for some work. I ordered a set of replacement piston rings but noticed that the kit doesn’t include the inner springs that the pistons had underneath the middle and bottom rings. According to the parts catalog, the 239 calls for the B5A 6148-CA (low mileage) or B4AZ 6148-A (Hi Lo) ring sets. Unfortunately, I can’t find pictures of the actual contents of these sets to see which one (or both) contain the springs.
I did notice one minor difference between the new middle rings and oil ring spacers and the originals - they are slightly wider. Would this be why inner springs didn’t come with the new set?
Thanks in advance for any info you can share.
I did notice one minor difference between the new middle rings and oil ring spacers and the originals - they are slightly wider. Would this be why inner springs didn’t come with the new set?
Thanks in advance for any info you can share.
Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 217
From: W (BY GOD) V
... piston rings but noticed that the kit doesn’t include the inner springs that the pistons had underneath the middle and bottom rings.
Thread Starter
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Mountain Pass
Joined: Oct 2017
Posts: 121
Likes: 20
From: Northwest PA (Erie)
Block is at shop now, rings are perfect, and cylinders were measured before ordering rings. All is well.
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