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Author Topic: 302  (Read 1522 times)

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390owner

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302
« on: December 30, 2019, 07:22:20 PM »
Ok I now have my 3 sbf engine to rebuild. It is a 69 block ford 302 standard bore. The pistons seem loose in the cylinders but there is barley a ring groove. I tried to put a 30 over ring in the cylinder and it would not fit so I know it it standard bore. If it was worn really bad would there not be a ring groove? I had a 30 over piston  and without rings it fit in the standard bore.
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Heo

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Re: 302
« Reply #1 on: December 30, 2019, 07:24:57 PM »
Hone and reringed in the past
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The defenition of a Gentleman, is a man that can play the accordion.But dont do it

frnkeore

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Re: 302
« Reply #2 on: December 30, 2019, 08:13:01 PM »
You'll need to measure near the top of the ring travel to find out how much taper you have. Take it to a shop and have them do it for you.

If it warn .006, or less, you might get away with having it honed and using .005 over rings and then knurl the pistons, to match.
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Frank

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Falcon67

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Re: 302
« Reply #3 on: January 03, 2020, 05:07:15 PM »
If you can fit a 4.030 piston in there, that means the bore is somewhere around 4.027 so yea- it's time to bore it. 
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